Business Class M2 - RPE Support Web Site

Business Class M2 - RPE Support Web Site
Foreword
Introduction
This manual provides information needed to operate
and understand the vehicle and its components.
More detailed information is contained in the Owner’s
Warranty Information for North America booklet, and
in the vehicle’s workshop and maintenance manuals.
Custom-built Freightliner vehicles are equipped with
various chassis and cab components. Not all of the
information contained in this manual applies to every
vehicle. For details about components in your vehicle, refer to the chassis specification pages included in all new vehicles and to the vehicle specification decal, located inside the vehicle.
For your reference, keep this manual in the vehicle
at all times.
IMPORTANT: Descriptions and specifications in
this manual were in effect at the time of printing.
Freightliner Trucks reserves the right to discontinue models and to change specifications or
design at any time without notice and without
incurring obligation. Descriptions and specifications contained in this publication provide no
warranty, expressed or implied, and are subject
to revisions and editions without notice.
Environmental Concerns and
Recommendations
Whenever you see instructions in this manual to discard materials, you should first attempt to reclaim
and recycle them. To preserve our environment, follow appropriate environmental rules and regulations
when disposing of materials.
Event Data Recorder
This vehicle is equipped with one or more devices
that record specific vehicle data. The type and
amount of data recorded varies depending on how
the vehicle is equipped (such as the brand of engine,
if an air bag is installed, or if the vehicle features a
collision avoidance system, etc.).
dealer referral, vehicle information, breakdown coordination, or Fleetpack assistance. Our people are
knowledgeable, professional, and committed to following through to help you keep your truck moving.
Reporting Safety Defects
If you believe that your vehicle has a defect which
could cause a crash or could cause injury or
death, you should immediately inform the National
Highway Traffic Safety Administration (NHTSA) in
addition to notifying Daimler Trucks North America
LLC.
If the NHTSA receives similar complaints, it may
open an investigation, and if it finds that a safety
defect exists in a group of vehicles, it may order a
recall and remedy campaign. However, NHTSA
cannot become involved in individual problems
between you, your dealer, or Daimler Trucks North
America LLC.
To contact NHTSA, you may call the Vehicle
Safety Hotline toll-free at 1-888-327-4236 (TTY:
1-800-424-9153); go to www.safercar.gov; or
write to: Administrator, NHTSA, 1200 New Jersey
Avenue, SE, Washington, DC 20590. You can also
obtain other information about motor vehicle safety
from www.safercar.gov.
Canadian customers who wish to report a safetyrelated defect to Transport Canada, Defect Investigations and Recalls, may telephone the toll-free
hotline 1-800-333-0510, or contact Transport
Canada by mail at: Transport Canada, ASFAD,
Place de Ville Tower C, 330 Sparks Street, Ottawa, Ontario, Canada K1A 0N5.
For additional road safety information, please visit
the Road Safety website at: www.tc.gc.ca/
roadsafety.
Customer Assistance Center
Having trouble finding service? Call the Customer
Assistance Center at 1-800-385-4357 or 1-800-FTLHELP. Call night or day, weekdays or weekends, for
STI-455-4 (2/11P)
A24-01238-000
Printed in U.S.A.
Foreword
© 2001–2011 Daimler Trucks North America LLC. All rights reserved. Daimler Trucks North America LLC is a Daimler
company.
No part of this publication, in whole or part, may be translated, reproduced, stored in a retrieval system, or transmitted
in any form by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Daimler Trucks North America LLC. For additional information, please contact Daimler Trucks North
America LLC, Service Systems and Documentation, P.O. Box 3849, Portland OR 97208–3849 U.S.A. or refer to
www.Daimler-TrucksNorthAmerica.com and www.FreightlinerTrucks.com.
Contents
Chapter
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Page
Introduction, Environmental Concerns and Recommendations,
Event Data Recorder, Customer Assistance Center, Reporting
Safety Defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Foreword
Vehicle Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1
Vehicle Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1
Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
Cab Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1
Heater, Ventilator and Air Conditioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1
Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.1
Drivetrain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1
Steering and Brake Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1
Fifth Wheels and Trailer Couplings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.1
Pretrip and Post-Trip Inspections and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1
Cab Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.1
In an Emergency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.1
Headlight Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.1
Hybrid Electric Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.1
Natural Gas Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.1
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I.1
1
Vehicle Identification
Vehicle Specification Decal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Federal Motor Vehicle Safety Standard (FMVSS) Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Canadian Motor Vehicle Safety Standard (CMVSS) Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire and Rim Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EPA Emission Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1
1.1
1.2
1.2
1.2
Vehicle Identification
Vehicle Specification Decal
COMPONENT INFORMATION
MANUFACTURED BY
MODEL
VEHICLE ID NO.
DATE OF MFR
ENGINE MODEL
TRANS MODEL MAIN
FRONT AXLE MODEL
REAR AXLE MODEL
PAINT MFR
PAINT NO.
IMRON PAINT−CAB
CAB COLOR A: WHITE (4775)
CAB COLOR B: BROWN (3295)
CAB COLOR C: BROWN (29607)
CAB COLOR D: DARK BROWN (7444)
3
1
The vehicle specification decal lists the vehicle
model, identification number, and major component
models. It also recaps the major assemblies and installations shown on the chassis specification sheet.
One copy of the specification decal is attached to the
driver’s side sunvisor; another copy is inside the rear
cover of the Owner’s Warranty Information for North
America booklet. An illustration of the decal is shown
in Fig. 1.1.
11/14/2001
2
f080118
1. Date of Manufacture: by month and year
2. Gross Vehicle Weight Rating: developed by taking
the sum of all the vehicle’s gross axle ratings
3. Gross Axle Weight Ratings: developed by
considering each component in an axle system–
including suspension, axle, wheels, and tires–and
using the lowest component capacity as the value
for the system
Fig. 1.2, Certification Statement, U.S.
USE VEHICLE ID NO.
WHEN ORDERING PARTS
WHEELBASE
ENGINE NO.
TRANS NO.
FRT AXLE NO.
REAR AXLE NO.
REAR AXLE NO.
RATIO
FOR COMPLETE PAINT INFORMATION
SEE VEHICLE SPECIFICATION SHEET
1
PART NO. 24−00273−010
11/21/96
f080021
Fig. 1.1, Vehicle Specification Decal, U.S.-Built Vehicle
Shown
NOTE: Labels shown in this chapter are examples only. Actual specifications may vary from
vehicle to vehicle.
2
Federal Motor Vehicle Safety
Standard (FMVSS) Labels
NOTE: Due to the variety of FMVSS certification
requirements, not all of the labels shown will
apply to your vehicle.
Tractors with or without fifth wheels purchased in the
U.S. are certified by means of a certification statement (Fig. 1.2) and the tire and rim information, combined into one label. This label is attached to the left
rear door post, as shown in Fig. 1.3.
If purchased for service in the U.S., trucks built without a cargo body have an incomplete certification
label (Fig. 1.4) attached to the left rear door post. In
addition, after completion of the vehicle, a certification label similar to that shown in Fig. 1.2 must be
attached by the final-stage manufacturer. This label
will be located on the left rear door post and certifies
1.1
11/13/2001
f080117
1. Tire and Rim Information
2. Certification Statement
Fig. 1.3, Label Location
11/14/2001
f080120
Fig. 1.4, Incomplete Vehicle Certification Label, U.S.
Vehicle Identification
that the vehicle conforms to all applicable FMVSS
regulations in effect on the date of completion.
Canadian Motor Vehicle Safety
Standard (CMVSS) Labels
In Canada, tractors with fifth wheels are certified by
means of a "Statement of Compliance" label and the
Canadian National Safety Mark (Fig. 1.5), which are
attached to the left rear door post. In addition, tire
and rim information (Fig. 1.6) is also included in the
label attached to the left rear door post.
given gross axle weight rating. Tires and rims installed on the vehicle at the time of manufacture may
have a higher load capacity than that certified by the
tire and rim label. If the tires and rims currently on
the vehicle have a lower load capacity than that
shown on the tire and rim label, then the tires and
rims determine the load limitations on each of the
axles.
See Fig. 1.6 for U.S. and Canadian tire and rim labels.
EPA Emission Control
Vehicle Noise Emission Control Label
A vehicle noise emission control label (Fig. 1.7) is
attached either to the left side of the dashboard or to
the top-right surface of the frontwall between the
dash and the windshield.
VEHICLE NOISE EMISSION CONTROL INFORMATION
f080024
10/10/2006
Fig. 1.5, Canadian National Safety Mark
1
DATE OF MANUFACTURE 01/96
FREIGHTLINER CORPORATION
THIS VEHICLE CONFORMS TO U.S. EPA REGULATIONS FOR NOISE EMISSION
APPLICABLE TO MEDIUM AND HEAVY TRUCKS.
THE FOLLOWING ACTS OR THE CAUSING THEREOF BY ANY PERSON ARE PROHIBITED BY
THE NOISE CONTROL ACT OF 1972:
A. THE REMOVAL OR RENDERING INOPERATIVE, OTHER THAN FOR PURPOSES OF
MAINTENANCE, REPAIR, OR REPLACEMENT, OF ANY NOISE CONTROL DEVICE OR
ELEMENT OF DESIGN (LISTED IN THE OWNER’S MANUAL) INCORPORATED INTO THIS
VEHICLE IN COMPLIANCE WITH THE NOISE CONTROL ACT.
B. THE USE THIS VEHICLE AFTER SUCH DEVICE OR ELEMENT OF DESIGN HAS
BEEN REMOVED OR RENDERED INOPERATIVE.
24−00273−020
10/06/98
2
f080026
Fig. 1.7, Vehicle Noise Emission Control Label
11/14/2001
f080119
1. Gross Weight Rating By Component in Axle System
2. Gross Vehicle Weight Rating By Component in
Vehicle As a Whole
Fig. 1.6, Tire and Rim Information
If purchased for service in Canada, trucks built without a cargo body and tractors built without a fifth
wheel are certified by a "Statement of Compliance"
label, similar to Fig. 1.2. This label must be attached
by the final-stage manufacturer after completion of
the vehicle. The label is located on the left rear door
post, and certifies that the vehicle conforms to all
applicable CMVSS regulations in effect on the date
of completion.
Tire and Rim Labels
Tire and rim labels certify suitable tire and rim combinations that can be installed on the vehicle, for the
IMPORTANT: Certain Freightliner incomplete
vehicles may be produced with incomplete noise
control hardware. Such vehicles will not have a
vehicle noise emission control information label.
For such vehicles, it is the final-stage manufacturer’s responsibility to complete the vehicle in
conformity to U.S. EPA regulations (40 CFR Part
205) and label it for compliance.
EPA07 and EPA10 Emission Control
To meet EPA07 and EPA10 emissions regulations for
vehicles domiciled in the USA or Canada, engines
manufactured after December 31, 2006 (EPA07) or
December 31, 2009 (EPA10) are equipped with an
emission aftertreatment system. Vehicles domiciled
outside of the USA and Canada may not have aftertreatment equipment, depending upon local statutory
emissions guidelines. There is a warning label
(placement will vary), for important new warning indicators in the driver’s message display, that pertain to
the aftertreatment system.
1.2
Vehicle Identification
It is a violation of US federal law to alter exhaust
plumbing or aftertreatment in any way that would
bring the engine out of compliance with certification
requirements. (Ref: 42 U.S.C. S7522(a) (3).) It is the
owner’s responsibility to maintain the vehicle so that
it conforms to EPA regulations.
1.3
2
Vehicle Access
Cab Door Locks and Handles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grab Handles and Access Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cab Entry and Exit, Vehicles With Two Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cab Entry and Exit, Vehicles With One Step . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back-of-Cab Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hood Opening and Closing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1
2.1
2.2
2.4
2.5
2.6
2.7
2.8
Vehicle Access
Cab Door Locks and Handles
1
One key operates the ignition switch and all of the
door locks.
2
3
4
IMPORTANT: Each key is numbered. Record
the number so a duplicate key can be made, if
needed.
To unlock the driver’s door from outside the cab, insert the key in the lockset and turn it one-quarter turn
clockwise (Fig. 2.1). To remove the key, turn it counterclockwise to its original position. Pull out on the
door pull handle to open the door.
5
2
1
f720398
10/25/2001
To open the door from the inside, lift up on the door lever
(arrow).
1. Lock Button
2. Armrest/Handle
3. Door Lever
4. Window Crank
5. Inner Door Grab Handle (optional)
3
10/22/2001
f720397
1. Key
2. Lock
3. Door Pull Handle
Fig. 2.1, Exterior Door Handle
To unlock the passenger’s door from outside the cab,
insert the key in the lockset and turn it one-quarter
turn counterclockwise. Turn the key clockwise to the
original position to remove it.
NOTE: The cab door locks can be operated
when the doors are open.
To lock a door from outside the cab, do either one of
the following:
• Insert the key in the lockset and turn it in the
direction opposite to the unlocking direction
(counterclockwise for the driver’s door, clockwise for the passenger’s door). Close the door
if it is open.
• Push down the inside lock button (Fig. 2.2).
Close the door.
2.1
Fig. 2.2, Door Interior
To open the door from the inside, lift up on the door
lever. This will unlatch the door whether or not it is
locked. If it is open, close the door by pulling the
inner door grab handle.
To lock either door from inside the cab, slide the lock
button downwards (Fig. 2.3). To unlock the door
without unlatching it, push the lock button upwards. A
red dot will show below the lock button when it is
unlocked.
Grab Handles and Access
Steps
For ease of entry and exit, there are three grab
handles, one on the A-pillar, one on the inner B-pillar,
and an optional one on the inside of the door. In addition, the steering wheel may be used to provide
secure handholds. There are one or two access
steps to provide secure footholds.
Vehicle Access
Use the cab access system (grab handles, access
steps, and steering wheel) to enter or exit the cab.
Entering from the Driver’s Side
2
To enter the cab from the driver’s side, do the following steps (Fig. 2.4):
3
1
1
10/24/2001
f720401
Move the button down to lock, and up to unlock (arrows).
The door is unlocked when the red dot shows.
1. Door
2. Lock Button
3. Red Dot
5
Fig. 2.3, Door Lock Button
NOTE: The A-pillar grab handle is not installed
on the driver’s side.
4
The grab handles, access steps, and steering wheel
are all part of the cab access system. Use these
"helping hands" when getting into, or out of, the cab.
They will increase your security and comfort.
Cab Entry and Exit, Vehicles
With Two Steps
WARNING
Wet or dirty shoe soles greatly increase the
chance of slipping or falling. If your soles are wet
or dirty, be especially careful when climbing
onto, or down from, the back-of-cab area.
2
3
11/02/2001
1.
2.
3.
4.
5.
f720399
Steering Wheel
B-Pillar Grab Handle
Bottom Step
Top Step
Inner Door Grab Handle (optional)
Fig. 2.4, Cab Access System, Driver’s Side
1.
Use the door pull handle to open the driver’s
door, and place anything that you are carrying in
the cab.
Always maintain three-point contact with the
back-of-cab access supports while entering and
exiting the back-of-cab area. Three-point contact
means both feet and one hand, or both hands
and one foot, on the grab handles, steps, and
deck plates. Other areas are not meant to support back-of-cab access, and grabbing or stepping in the wrong place could lead to a fall, and
personal injury.
2.
Grasp the B-pillar grab handle with both hands.
Reach up as far as is comfortable.
3.
Place your right foot on the bottom step, and pull
yourself up.
4.
Place your left foot on the top step.
5.
Grasp the steering wheel with your left hand, and
step up.
Be careful not to get hands or feet tangled in
hoses or other back-of-cab equipment. Carelessness could cause a person to trip and fall, with
possible injury.
6.
Step into the cab with your right foot first, and
grasp the steering wheel with your right hand.
2.2
Vehicle Access
NOTE: You can also use the inner door grab
handle, if available, as a support when getting
up or down from the bottom step.
5
4
Exiting from the Driver’s Side
To exit the cab from the driver’s side, do the following steps (Fig. 2.4):
IMPORTANT: Do not attempt to exit the cab
while carrying any items in your hands.
1.
If you wish to take any items with you, after you
exit the cab, place them in an accessible location
on the seat or cab floor. Make sure they will not
get in your way as you exit.
3
WARNING
Always face in when exiting the cab. Do not attempt to exit with your back to the cab, as you
would going down a flight of stairs. It is easier to
slip or lose your balance. If you slip when exiting
in this way, there is a greater likelihood of personal injury.
2.
Grasp the steering wheel with both hands. Place
your left foot on the top step, and stand on the
threshold, facing into the cab.
2
1
10/23/2001
1.
2.
3.
4.
5.
f720400
Bottom Step
Top Step
B-Pillar Grab Handle
Sidewall Grab Handle (optional)
A-Pillar Cover Grab Handle
Fig. 2.5, Cab Access System, Passenger’s Side and
Back of Cab
3.
Place your left foot on the bottom step and step
up to the upper step with your right foot.
4.
Move your right hand to the A-pillar cover grab
handle.
Step to the ground with your left foot first.
5.
Place your left foot on the top step and step up.
Retrieve from the cab any items that you wish to
take with you.
6.
Move your left hand to the A-pillar cover grab
handle.
7.
Step into the cab with your left foot first.
3.
Move your right hand to the B-pillar grab handle.
4.
Move your right foot to the bottom step.
5.
Move your left hand to the B-pillar grab handle.
6.
7.
NOTE: You can also use the inner door grab
handle, if available, as a support when getting
up or down from the bottom step.
Entering from the Passenger’s Side
NOTE: You can also use the inner door grab
handle, if available, as a support when getting
up or down from the bottom step.
To enter the cab from the passenger’s side, do the
following steps (Fig. 2.5):
Exiting from the Passenger’s Side
1.
Open the passenger’s door, and place anything
that you are carrying in the cab.
To exit the cab from the passenger’s side, do the following steps (Fig. 2.5):
2.
Grasp the B-pillar grab handle on the door with
both hands.
IMPORTANT: Do not attempt to exit the cab
while carrying any items in your hands.
1.
2.3
If you wish to take any items with you, after you
exit the cab, place them in an accessible location
Vehicle Access
on the seat or cab floor. Make sure they will not
get in your way as you exit.
WARNING
Always face in when exiting the cab. Do not attempt to exit with your back to the cab, as you
would going down a flight of stairs. It is easier to
slip or lose your balance. If you slip when exiting
in this way, there is a greater likelihood of personal injury.
ness could cause a person to trip and fall, with
possible injury.
Use the cab access system (grab handles, access
steps, and steering wheel) to enter or exit the cab.
Entering from the Driver’s Side
To enter the cab from the driver’s side, do the following steps (Fig. 2.4):
1.
Use the door pull handle to open the driver’s
door, and place anything that you are carrying in
the cab. Use the door armrest/handle and, if
available, the inner door grab handle, as a support if needed.
2.
Grasp the B-pillar grab handle with both hands.
Reach up as far as is comfortable.
3.
Place your right foot on the step, and pull yourself up.
2.
Grasp the A-pillar cover grab handle with both
hands, then place your right foot on the top step
while standing up from the seat facing inward.
3.
Place your left foot on the top step.
4.
Move your left hand to the B-pillar grab handle.
5.
Move your left foot to the bottom step.
6.
Move your right hand to the B-pillar grab handle.
4.
Step into the cab with your left foot.
7.
Step to the ground with your right foot first.
5.
Grasp the steering wheel with your left hand.
8.
Retrieve from the cab any items that you wish to
take with you.
6.
Step into the cab with your right foot, and grasp
the steering wheel with your right hand.
NOTE: You can also use the inner door grab
handle, if available, as a support when getting
up or down from the bottom step.
NOTE: You can also use the inner door grab
handle, if available, as a support when getting
up or down from the bottom step.
Cab Entry and Exit, Vehicles
With One Step
Exiting from the Driver’s Side
WARNING
Wet or dirty shoe soles greatly increase the
chance of slipping or falling. If your soles are wet
or dirty, be especially careful when climbing
onto, or down from, the back-of-cab area.
Always maintain three-point contact with the
back-of-cab access supports while entering and
exiting the back-of-cab area. Three-point contact
means both feet and one hand, or both hands
and one foot, on the grab handles, steps, and
deck plates. Other areas are not meant to support back-of-cab access, and grabbing or stepping in the wrong place could lead to a fall, and
personal injury.
Be careful not to get hands or feet tangled in
hoses or other back-of-cab equipment. Careless-
To exit the cab from the driver’s side, do the following steps (Fig. 2.4):
IMPORTANT: Do not attempt to exit the cab
while carrying any items in your hands.
1.
If you wish to take any items with you, after you
exit the cab, place them in an accessible location
on the seat or cab floor. Make sure they will not
get in your way as you exit.
WARNING
Always face in when exiting the cab. Do not attempt to exit with your back to the cab, as you
would going down a flight of stairs. It is easier to
slip or lose your balance. If you slip when exiting
in this way, there is a greater likelihood of personal injury.
2.4
Vehicle Access
2.
Grasp the steering wheel with both hands. Place
your left foot on the step, and stand on the
threshold, facing into the cab.
3.
Move your right hand to the B-pillar grab handle.
4.
Move your left hand to the B-pillar grab handle.
5.
Move your right foot onto the step.
6.
Step to the ground with your left foot first.
7.
Retrieve from the cab any items that you wish to
take with you.
NOTE: You can also use the inner door grab
handle, if available, as a support when getting
up or down from the bottom step.
Entering from the Passenger’s Side
To enter the cab from the passenger’s side, do the
following steps (Fig. 2.5):
WARNING
Always face in when exiting the cab. Do not attempt to exit with your back to the cab, as you
would going down a flight of stairs. It is easier to
slip or lose your balance. If you slip when exiting
in this way, there is a greater likelihood of personal injury.
2.
Grasp the A-pillar cover grab handle with both
hands, then place your right foot on the step
while standing up from the seat facing inward.
3.
Place your left foot on the step.
4.
Move your left hand to the B-pillar grab handle.
5.
Move your right hand to the B-pillar grab handle.
6.
Step to the ground with your right foot first.
7.
Retrieve from the cab any items that you wish to
take with you.
1.
Open the passenger’s door, and place anything
that you are carrying in the cab.
2.
Grasp the B-pillar grab handle with both hands.
NOTE: You can also use the inner door grab
handle, if available, as a support when getting
up or down from the bottom step.
3.
Place your left foot on the step and step up to
the cab with your right foot.
Back-of-Cab Access
4.
Move your right hand to the A-pillar cover grab
handle.
5.
Move your left hand to the A-pillar cover grab
handle.
6.
Step into the cab with your left foot.
NOTE: You can also use the inner door grab
handle, if available, as a support when getting
up or down from the bottom step.
Exiting from the Passenger’s Side
To exit the cab from the passenger’s side, do the following steps (Fig. 2.5):
IMPORTANT: Do not attempt to exit the cab
while carrying any items in your hands.
1.
If you wish to take any items with you, after you
exit the cab, place them in an accessible location
on the seat or cab floor. Make sure they will not
get in your way as you exit.
When trailer air and electrical connections cannot be
reached conveniently from the ground, Federal Motor
Carrier Safety Regulations require commercial carriers to provide back-of-cab access.
Optional grab handles are mounted on each cab
sidewall, or on the left sidewall only. See Fig. 2.6.
Steps are mounted either on the fuel tank(s) or on
metal brackets. When a deck plate is necessary, it is
mounted across the top of the frame rails.
IMPORTANT: Climb onto, and down from, backof-cab access facing in toward the vehicle, as
you would on a ladder. Do not climb up or down
facing out away from the vehicle.
WARNING
Wet or dirty shoe soles greatly increase the
chance of slipping or falling. If your soles are wet
or dirty, be especially careful when climbing
onto, or leaving, the back-of-cab area.
Always maintain three-point contact with the
back-of-cab access supports while entering and
2.5
Vehicle Access
2.
Place one foot on the bottom step and pull yourself up.
3.
Place your other foot on the top step.
4.
Move your lower hand to a higher position on the
grab handle.
5.
Step onto the deck plate.
Climbing Down from Back-of-Cab
To climb down from the back-of-cab area:
2
3
1
1.
Grasp the sidewall grab handle with both hands.
2.
Step one foot at a time onto the top step.
3.
Move your upper hand to a lower position on the
grab handle.
4.
Move one foot to the bottom step.
5.
Move your upper hand to a lower position on the
grab handle.
6.
Step to the ground with your upper foot first.
Battery Access
Battery Compartment
09/28/2007
1
1. Steps
2. Grab Handle
f602336
3. Deck Plate
Fig. 2.6, Back-of-Cab Access Supports (typical)
The battery compartment is located in the lower part
of the cab beneath and to the rear of the driver’s
door. It is fastened by a quarter-turn fastener. To
open the battery access door, turn the quarter-turn
fastener with a small screwdriver. See Fig. 2.7.
exiting the back-of-cab area. Three-point contact
means both feet and one hand, or both hands
and one foot, on the grab handles, steps, and
deck plates. Other areas are not meant to support back-of-cab access, and grabbing or stepping in the wrong place could lead to a fall, and
personal injury.
Be careful not to get hands or feet tangled in
hoses or other back-of-cab equipment. Carelessness could cause a person to trip and fall, with
possible injury.
Entering Back-of-Cab
When climbing onto the deck plate, do the following:
1.
Grasp the sidewall grab handle with both hands.
Reach up as far as is comfortable.
10/25/2001
f543934
Open the battery access door by turning the quarter-turn
fastener (arrow) with a small screwdriver.
Fig. 2.7, Battery Compartment, Closed
2.6
Vehicle Access
With the battery access door open (Fig. 2.8), it is
easy to get access to the battery terminals for cleaning, charging, or emergency jump starting.
NOTE: Whenever battery power is disconnected, clocks and electronically tuned radios
must be reset.
3
2
4
1
01/18/95
1.
2.
3.
4.
Top Step
Battery
Cab
Battery Access Door
Fig. 2.8, Battery Compartment, Open
To close the battery access door, do the following
steps:
1.
Swing the battery access door to line up the
quarter-turn fastener with the hole in the cab
door frame.
2.
Close the battery access door and check to be
sure the quarter-turn fastener is engaged with
the hole.
3.
Fig. 2.9, Cab (Battery) Isolation Switch
Hood Opening and Closing
The hood can be raised to a full-open position. A torsion bar helps you to raise the hood, and to lower it
to the operating position. Hood restraint cables prevent the hood from overtravel. A hood damper limits
the closing speed. In the operating position, the hood
is secured to the cab-mounted half-fenders by a
hold-down latch on each side of the hood.
To Open the Hood
1.
Apply the parking brakes.
2.
Release both hood hold-down latches by pulling
the ends outward. See Fig. 2.10.
Turn the fastener one-quarter turn.
Cab (Battery) Isolation Switch
The cab isolation switch (see Fig. 2.9) is located on
the cab floor at the left of the driver’s seat, or inside
the battery box. The battery isolation switch reduces
the power to the cab and engine power wiring. Use it
whenever the vehicle is to be put out of service for
extended periods.
IMPORTANT: The battery disconnect switch
does not completely isolate the batteries from
the electrical system. For service operations that
require that the batteries be disconnected, always shut down the engine and remove the
negative battery cables.
2.7
f600150a
f543933
10/24/2001
CAUTION
Do not let the hood free-fall to the full-open position. To do so could cause damage to the hood
or hood straps.
3.
Standing in front of the hood, raise the rear of
the hood upward until it reaches the over-center
position (45 degrees from vertical). Then slowly
bring it to a stop.
To Close the Hood
1.
Push the hood over center.
Vehicle Access
3
2
4
1
10/24/2001
f880555
1. Fender
2. Latch Hook
3. Latch Handle
4. Half-Fender
Fig. 2.10, Hood Hold-Down Latch
2.
As the hood goes over center, the damper automatically slows its rate of descent. If needed, you
can also slow its rate of descent with your hand.
3.
Make sure the hood is flush with the cowl, then
secure the hood by engaging both hood holddown latches.
IMPORTANT: Make sure that both hold-down
latches are fully engaged before operating the
vehicle.
Fuse Identification
Main Fuse Box/PDM
The main fuse box, also known as the power distribution module, or PDM, is located under the hood on
the left front fender just forward of the bulkhead module. See Fig. 2.11. To open the fuse box, pull down
on the wire clips holding the lid on the fuse box.
A sticker inside the lid of the fuse box shows the locations of the fuses and describes the circuit(s) that
each fuse protects (see Fig. 2.12). See Table 2.1 for
descriptions of a typical set of fuses. The fuses in the
main fuse box are mini blade-type fuses. Battery
power fuses, located near the batteries, are bolt-in
megafuses.
Because the electrical system is multiplexed, no relays are needed. The multiplexing module performs
the functions normally provided by relays.
Fuse Identification, Main Fuse Box
Pos.
Description
Fuse Color
Rating
No.
F1 VCU (MBE900 only)
Red
10 Amp
F2 Blower Motor
Green
30 Amp
F3 Engine ECU
Yellow
20 Amp
Transmission Control
Green
30 Amp
F4
Unit
F5 Ignition Switch
Tan
5 Amp
F6 Spare
—
—
F7 Bulkhead Module
Green
30 Amp
F8 ICU
Red
10 Amp
Transmission Control
Yellow
20 Amp
F9
Unit
F10 Door Locks (optional)
Red
10 Amp
F11 Mirrors (optional)
Blue
15 Amp
F12 Radio/Diagnostics
Yellow
20 Amp
F13 Chassis Module
Green
30 Amp
L/H Power Windows
Blue
15 Amp
F14
(optional)
F15 Bulkhead Module
Green
30 Amp
F16 ABS ECU
Blue
15 Amp
F17 Chassis Module
Green
30 Amp
F18 Bulkhead Module
Green
30 Amp
F19 Chassis Module
Green
30 Amp
F20 Bulkhead Module
Green
30 Amp
R/H Power Windows
Blue
15 Amp
F21
(optional)
F22 Bulkhead Module
Green
30 Amp
F23 Spare
—
—
F24 Spare
—
—
F25 Spare
—
—
F26 Spare
—
—
M1 Battery Power
—
125 Amp
M2 Battery Power
—
125 Amp
M3 Battery Power
—
150 Amp
Table 2.1, Fuse Identification, Main Fuse Box
Trailer and Taillight Fuse Boxes
The trailer fuse box and the taillight fuse box, on vehicles so equipped, are mounted on a bracket with
the chassis module on the left-hand frame rail aft of
the cab, or on a crossmember at the end of the
frame rail. These may be referred to as the chassis
fuse box or chassis PDM. See Fig. 2.13 for trailer
fuse and relay information, and Fig. 2.14 for taillight
fuse and relay information.
2.8
Vehicle Access
These fuse boxes contain mini blade-type fuses, 12volt mini relays, and 12-volt micro relays.
1
2
09/28/2004
09/25/2001
f544528
f543935
1. Bulkhead Module
Fig. 2.13, Trailer Fuse Box Diagram
2. Main Fuse Box
Fig. 2.11, Location of the Main Fuse Box
10/25/2001
f543936
Fig. 2.12, Main Fuse Box Diagram
10/07/2004
f544541
Fig. 2.14, Taillight Fuse Box Diagram
2.9
3
Instruments
Instrumentation Control Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1
Warning and Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6
Overhead Instrument Panel, Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.10
Speedometer and Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.10
Standard Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.11
Optional Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.14
Collision Warning System, Eaton VORAD EVT–300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.17
Instruments
Instrumentation Control Unit
There can be up to eight gauges on the driver’s instrument panel (six electronic and two mechanical).
Only the air gauges operate mechanically.
Figure 3.1 shows a typical set of instruments for vehicles equipped with the M2 instrument cluster
(ICU3-M2).
The M2 instrument cluster has the capability to drive
independent stand-alone gauges such as those installed on the auxiliary dash panel. Figure 3.3 shows
a typical dash.
Figure 3.2 shows a more basic instrument cluster.
The tachometer and the transmission temperature
gauge are not shown.
Dash Message Center
The M2 instrument cluster (ICU3-M2) is on vehicles
with engines manufactured before January 1, 2007,
and the ICU3X is on vehicles with engines manufactured January 1, 2007 or later. They can be differentiated by their ISO icons.
2
The dash message center is the heart of the instrument cluster. It has two parts, a set of 26 warning
and indicator lights similar to those found on a conventional lightbar, and a dash driver display screen.
3
4
5
1
6
12
7
8
09/10/2009
11
10
9
f610525a
NOTE: This instrument cluster is shown with the U.S. speedometer, which shows miles per hour (mph) more prominently
than kilometers per hour (km/h).
1.
2.
3.
4.
5.
Engine Oil Pressure Gauge
Dash Message Center
Dash Driver Display Screen
Headlight High-Beam Indicator
Fuel Level Gauge
6.
7.
8.
9.
Primary Air Pressure Gauge
Mode/Reset Switch
Secondary Air Pressure Gauge
Speedometer (U.S. version)
10. Tachometer (optional)
11. Transmission Temperature Gauge
(optional)
12. Coolant Temperature Gauge
Fig. 3.1, Gauge Layout, Typical, U.S. (EPA10 shown)
3.1
Instruments
1
2
3
4
5
9
6
10
7
8
09/10/2009
f610526c
NOTE: This instrument cluster is shown with the NAFTA speedometer, which shows km/h more prominently than mph.
1.
2.
3.
4.
Engine Oil Pressure Gauge
Dash Message Center
Dash Driver Display Screen
Fuel Level Gauge
5. Primary Air Pressure Gauge
6. Mode/Reset Switch
7. Secondary Air Pressure Gauge
8. Speedometer (NAFTA version)
9. Headlight High-Beam Indicator
10. Coolant Temperature Gauge
Fig. 3.2, Gauge Layout, Basic (EPA10 shown)
The driver display screen is a one-line by sevencharacter liquid crystal display (LCD) that normally
shows odometer readings. Below this display is a
smaller one-line by three-character LCD that shows
voltmeter readings.
The dash message center houses all of the standard
and optional warning and indicator lights. Warning
messages and diagnostic fault codes will appear in
the driver display screen. For more information on
this system, see under the heading "Ignition Sequence" in this chapter.
Ignition Sequence
The dash message center goes through a prescribed
ignition sequence each time the ignition switch is
turned on. See Fig. 3.4 for the ignition sequence.
If service miles or service hours has been exceeded,
either Fig. 3.5 or Fig. 3.6 will come up before the
fault screen (if faults are present. If no faults are
present and service hours or miles are exceeded,
either Fig. 3.5 or Fig. 3.6 will stay displayed unti the
park brake is released with the engine running, or
the mode button is pressed.
When the ignition is turned on, all the electronic
gauges complete a full sweep of their dials, the
warning and indicator lights light up, and the buzzer
sounds for 3 seconds.
NOTE: The air gauges do not sweep.
The following lights illuminate during the ignition sequence:
• Fasten Seat Belt Warning
• Low Battery Voltage Warning
3.2
Instruments
2
3
4
1
5
10/11/2001
f610578
NOTE: Instruments and controls, and their locations, may vary from those shown.
1. L/H Control Panel
2. Instrumentation Control Unit (ICU3-M2)
3. R/H Control Panel
4. Auxiliary Dash Panel
5. Climate Control Panel
Fig. 3.3, Dash Panel Layout (typical)
• High Coolant Temperature Warning
• Low Engine Oil Pressure Warning
• Low Air Pressure Warning
• Parking Brake On Indicator
• All engine indicator/warning lights, including
Check Engine, HET, DPF, and Stop Engine
• Check trans and Trans temp (if equipped)
• Cruise control active indicator
• Low fuel and Low DEF level lamp in Fuel
Gauge (if equipped with EPA10-compliant engine)
• The DEF level bar graph in the Fuel Gauge will
illuminate full scale (100% - all 4 segments w/
green LEDs) during the gauge sweep and then
3.3
sequence through all the levels (100%, 75%,
50%, 25%, 10%, 5%, 0%) when the gauge
sweep is completed. (if equipped with EPA10compliant engine)
NOTE: While the engine and ABS warning lights
illuminate during the ignition sequence, they are
not controlled by the instrument cluster but by
their own system ECU (electronic control unit).
When the ignition switch has been turned on, the
ICU performs a self-test, looking for active faults.
During the first half of the self-test, all segments of
the display illuminate as follows:
• First line (odometer): "888888.8"
• Second line (units): "TRIP MI KM HOURS"
Instruments
HEADLIGHTS ON
POWER ON
/ IGNITION OFF
IGNITION ON
123456.7
MI
ICU PERFORMS SELFTEST:
ELECTRONIC GAUGE NEEDLES
SWEEP, WARNING/INDICATOR
LIGHTS COME ON, BUZZER SOUNDS
ODOMETER
SCREEN
IF NO FAULTS
WERE DETECTED
**
IF FAULT DETECTED
*
123456.7
ABS 11
MI
12.3 VOLTS
FAULT CODE
SCREEN
PARK BRAKE
RELEASED − MOVING
**
123456.7
RELEASE PARK BRAKE
MI
12.3 VOLTS
f040804
10/26/2009
* HOURS SERVICE or MI SERVICE may display
** If the key was cycled off wile displaying Trip Miles, Trip Hours, or Ambient Air Temperature, that screen will be displayed instead of odometer miles, when the key is cycled ON without any faults.
Fig. 3.4, Ignition Sequence
• Third line (voltmeter): "88.8 % VOLTS SER-
VICE"
• Fourth line: "SPN ENGINE"
HOURS
SERVICE
10/26/2009
f040805
If there are no active faults, the driver display screen
displays the odometer.
Fig. 3.5, Service Hours Exceeded
MI
SERVICE
10/26/2009
f040806
Fig. 3.6, Service Miles Exceeded
During the second half of the self-test, the software
revision level is displayed.
If, however, the instrument cluster has received active fault codes from other devices, it displays them
one after the other until the parking brake is released, or the ignition switch is turned off. Once the
parking brake is released, the dash message center
displays the odometer again.
NOTE: If active faults are present, take the vehicle as soon as possible to an authorized
Freightliner service facility.
3.4
Instruments
If the fault is a serious problem that requires immediate attention, the engine protection system will activate. In most cases, the check engine light will illuminate also.
PUSH−
MODE
HOLD−
RESET
Some examples of faults requiring immediate attention include:
• High coolant temperature
• Low air pressure
• Low coolant level
• Low engine oil pressure
NOTE: The check engine light does not illuminate for a low air pressure fault.
The legend "SERVICE ENGINE" can appear on the
driver display screen as an active fault code. If this
legend appears, it means the trip miles (or hours)
have gone beyond the next required service interval,
as set by the vehicle operator.
IMPORTANT: If the legend "SERVICE ENGINE"
does appear on the driver display screen while
operating the vehicle, bring the vehicle to an
authorized Freightliner service facility when
convenient.
Odometer
The odometer is set to display in either miles or kilometers, depending on the primary scale of the
speedometer. The legend, either "MI" or "KM," illuminates between the odometer and the volts display
when the engine is running or the headlights are
turned on.
The odometer is a seven-digit display with a decimal
point, until the vehicle has traveled 999,999.9 miles
or kilometers (km). At one million miles (km), the
odometer resets itself to "1000000," without the decimal point, and can continue up to 9,999,999. The
odometer only displays significant figures (no leading
zeros).
Mode/Reset Switch
The mode/reset switch (Fig. 3.7) is located on the
right side of the instrument cluster. The mode/reset
switch is used to scroll through the displays on the
message display screen, and to reset the trip distance and trip hours values to zero.
3.5
09/25/99
f610340
Fig. 3.7, Mode/Reset Switch
When the odometer reading is displayed and the
parking brake is applied:
• Press the mode/reset switch once and the trip
distance will display.
• Press the mode/reset switch a second time
and the trip hours (engine hours) will display.
• Press the mode/reset switch again and the
temperature screen will be displayed (if
equipped).
• Press the mode/reset switch again and the SE-
LECT screen and the current units, MI or KM,
will display.
• Press the mode/reset switch again and the
temperature alert screen will be displayed (if
equipped).
• Press the mode/reset switch again and the
diagnostics/service screen will display.
• Press the mode/reset switch again and the
enggine miles (kilometers) screen will display.
• Press the mode/reset switch again and the en-
gine hours screen will display.
• Press the mode/reset switch again and the set
up screen will display
• Press the mode/reset switch againe to return
to the odometer reading.
To reset trip miles and/or trip hours to zero, press the
mode/reset switch for 1 second or longer. To toggle
between MI (miles) or KM (kilometers), press the
mode/reset switch while in the SELECT screen.
Instruments
Warning and Indicator Lights
NOTE: If the check engine light illuminates during vehicle operation, take the vehicle directly to
an authorized Freightliner service facility.
There can be up to 26 warning and indicator lights
(telltales) installed in the dash message center. See
Fig. 3.8 for 2004 engines, or see Fig. 3.9 for EPA07
engines, or see Fig. 3.10 for EPA10 engines. There
are four rows of lights. Lights installed in the top row
are optional and their positions may vary. The lights
in the bottom three rows are installed in fixed positions on all vehicles. Most are standard, but a few
are optional.
Engine Protection Warning
WARNING
When the red STOP engine lamp illuminates,
most engines are programmed to shut down automatically within 30 seconds. The driver must
immediately move the vehicle to a safe location
at the side of the road to prevent causing a hazardous situation that could cause bodily injury,
property damage, or severe damage to the engine.
Check Engine Indicator
The amber check engine indicator light (CHECK ENGINE legend) illuminates when certain faults are detected. If a critical engine condition exists (for example, low oil pressure, low coolant level, high
coolant temperature, high DPF soot level, or uncontrolled DPF rengeneration), the check engine light
will illuminate to alert the driver to correct the condition as soon as possible. If the condition gets worse,
the engine protection light will illuminate.
3
2
1
10
WASH
FLUID
5
INTAKE
HEATER
7
6
12
11
WHEEL
LOCK
4
The red Stop Engine, or Engine Protect, warning
light illuminates to indicate that the protection system
available for the engine has been activated. On
some engines, the engine ECU will derate the engine, allowing it to run, but at lower rpm and slower
vehicle speed. The vehicle may be driven to a safe
location or to a service facility.
8
13
WATER
IN FUEL
WHEEL
SPIN
LOW
WATER
14
CHECK
TRANS
9
15
ENG
FAN
LOW
FUEL
BRAKE
16
03/05/2002
22
17
23
19
18
24
21
20
25
26
27
f610593a
Typical installation shown. Location of legends installed in the top row may vary, and other legends may be specified.
1. Wheel Lock Warning (optional)
2. Low Washer Fluid Indicator
(optional)
3. Intake Heater On Indicator
(optional)
4. Water In Fuel Indicator (optional)
5. Wheel Spin Indicator (optional)
6. Low Coolant Warning (optional)
7. Check Transmission Indicator
(optional)
8. Engine Fan On Indicator (optional)
9.
10.
11.
12.
13.
14.
Low Fuel Warning (optional)
Check Engine Indicator
Engine Protection Warning
No Charge Indicator (optional)
Tractor ABS Indicator
Transmission Overheat Indicator
(optional)
15. Trailer ABS Indicator (as applies)
16. Low Oil Pressure Warning
17. High Coolant Temperature
Warning
18. Fasten Seat Belts Warning
19. Brake System Warning/Parking
Brake On Indicator
20. Not Used
21. Air Restriction Indicator (optional)
22. Left-Turn Signal Arrow
23. Low Battery Voltage Warning
24. Dash Driver Display Screen
25. High Beams On Indicator
26. Low Air Pressure Warning
27. Right-Turn Signal Arrow
Fig. 3.8, Warning and Indicator Lights, ICU3-M2 Pre-’07 Dash Message Center
3.6
Instruments
1 2
4
3
OPT
OPT
OPT
5
OPT
OPT
OPT
6
OPT
7
OPT
OPT
ABS
ABS
8
11
10
9
14
13
12
17
16
15
18
19
f610850
10/18/2006
Typical installation shown. Location of legends installed in the top row may vary, and other legends may be specified.
14.
15.
16.
17.
18.
19.
8.
9.
10.
11.
12.
Low Oil Pressure Warning
High Coolant Temperature
Fasten Seat Belt Warning
Parking Brake On Warning
Diesel Particulate Filter (DPF)
Status Lamp
13. High Exhaust System
Temperature (HEST) Warning
1.
2.
3.
4.
5.
6.
Optional Indicator
Check Engine Indicator
Stop Engine Indicator
Malfunction Indicator Light (MIL)
Tractor ABS Indicator
Transmission Temperature
Indicator
7. Trailer ABS Indicator
Left-Turn Signal
Low Battery Voltage Warning
Driver Display Screen
High Beams On Indicator
Low Air Pressure Warning
Right-Turn Signal
Fig. 3.9, Warning and Indicator Lights, ICU3X EPA07 Dash Message Center
3
AIR
FILTER
WASH
FLUID
CHECK
STOP
11
5
4
1 2
7
6
*WAIT*
TO START
*OPT 4*
8
WHEEL
SPIN
9 10
LOW
WATER
13
12
CHECK
TRANS
ABS
15
14
**IDLE**
MGMT
OPT 9
ABS
TRIP MI KM HOURS
VOLTS SERVICE
SPN ENGINE
17
16
19
18
21
20
22
28
24 26
25
27
29
23
10/26/2009
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Air Filter Indicator
Check Engine Indicator
Washer Fluid Indicator
Stop Engine Indicator
Wait to Start
Malfunction Indicator Light (MIL)
Blank for Optional Indicator
Wheel Spin Indicator
Low Water Indicator
Tractor ABS Indicator
Check Transmission Indicator
f611076
12. Transmission Temperature
Indicator
13. Idle Manager Indicator
14. Trailer ABS Indicator
15. Blank for Optional Indicator
16. Left-Turn Signal
17. Low Oil Pressure Warning
18. Low Battery Voltage Warning
19. High Coolant Temperature
20. Water in Fuel Indicator
21. Fasten Seat Belt Warning
22.
23.
24.
25.
26.
27.
28.
29.
Driver Display Screen
High Beams On Indicator
Parking Brake On Warning
Brake Air—Low Air Pressure
Warning
Diesel Particulate Filter (DPF)
Status Lamp
Cruise Control Enabled Indicator
High Exhaust System
Temperature (HEST) Warning
Right-Turn Signal
Fig. 3.10, Warning and Indicator Lights, ICU3X EPA10 Dash Message Center
3.7
Instruments
On other engines, the engine ECU will shut down the
engine. It will at first derate the engine, and, if the
condition does not improve, shut it down completely
30 seconds after the light comes on. The driver must
safely bring the vehicle to a stop on the side of the
road before the engine shuts down.
To restart the engine (override the shutdown command) turn the ignition switch to OFF, leave it there a
few seconds, and turn the switch to START. The engine will run for a short period and shut down again if
the condition does not improve.
IMPORTANT: Do not attempt to restart the engine while the vehicle is moving. Bring the vehicle to a safe stop and restart the engine with
the vehicle stopped.
Emergency Buzzer
The emergency buzzer sounds during the ignition
sequence and whenever one of the following conditions exists:
• The engine oil pressure falls below the preset
level shown in Table 3.1.
• The coolant temperature rises above the pre-
set level shown in Table 3.2.
• The air pressure falls below the preset level,
which is 65 psi (448 kPa).
• The parking brake is set with the vehicle mov-
ing at a speed greater than 2 miles per hour.
Warning and Indicator Lights
CHECK
STOP
Check Engine (amber)
Stop Engine or Engine Protect
(red)
High Exhaust System Temperature
(HEST) (amber)
Diesel Particulate Filter (DPF)
Status (amber)
Indicates an undesirable engine condition is detected or
recorded. If the condition gets worse, the stop engine or
engine protection light will illuminate.
Indicates a serious fault which requires the engine shut down
immediately. The engine ECU will reduce the maximum
engine torque and speed, and, if the condition does not
improve, will shut down the engine within 30 seconds of the
light illuminating. The driver must safely bring the vehicle to
a stop on the side of the road and shut down the engine as
soon as the red light is seen. If the engine shuts down while
the vehicle is in a hazardous location, the engine can be
restarted after turning the key to the OFF position for a few
seconds.
Slow (10-second) flash, indicates a regeneration is in
progress, and the driver is not controlling the engine idle
speed.
Solid illumination indicates a regeneration is in progress, with
high exhaust temperatures at the outlet of the tail pipe, if the
speed is below 5 mph (8 km/h). It does not signify the need
for service; it only alerts the vehicle operator of high exhaust
temperatures. See the engine operation manual for details.
Solid illuminated indicates a regeneration is required.
Change to a more challenging duty cycle, such as highway
driving, to raise exhaust temperatures for at least 20
minutes, or perform a parked regeneration. See the engine
operation manual for details.
Blinking indicates that a parked regeneration is required
immediately. An engine derate and shutdown will occur. See
the instructions in the engine operation manual to perform a
stationary regeneration.
Malfunction Indicator Lamp (MIL)
(amber)
Indicates an engine emissions-related fault, including, but not
limited to the aftertreatment system. See the engine
operation manual for details.
3.8
Instruments
Warning and Indicator Lights
Tractor ABS (amber)
Indicates a problem with the ABS is detected. Repair the
tractor ABS immediately to ensure full antilock braking
capability.
Trailer ABS (amber)
Indicates a fault is detected with the trailer ABS.
Left-Turn Signal (green)
Flashes on and off whenever the outside turn signal lights
are flashing.
Right-Turn Signal (green)
Flashes on and off whenever the outside turn signal lights
are flashing.
High-Beam Indicator (blue)
Indicates the headlights are on high beam.
Low Air Pressure Warning (red)
For EPA07, activates with a buzzer when air pressure in the
primary or secondary air reservoir falls below 64 to 76 psi
(440 to 525 kPa).
For EPA10, activates when suspension air is low.
Low Air Pressure Warning (red)
Activates with a buzzer when air pressure in the primary or
secondary air reservoir falls below 64 to 76 psi (440 to 525
kPa). (EPA10)
Activates with a buzzer when the coolant temperature goes
High Coolant Temperature Warning
above a maximum level specified by the engine
(red)
manufacturer (see the engine manual).
Low Engine Oil Pressure Warning
(red)
Intake Heater (amber)
BRAKE
3.9
Activates with a buzzer when engine oil pressure goes below
a minimum level specified by the engine manufacturer (see
the engine manual).
Indicates the intake air heater is active. Wait to start.
(EPA07)
Indicates the parking brake is engaged, or hydraulic brake
Parking/Emergency Brake Warning fluid pressure is low. A buzzer activates when the vehicle is
(BRAKE!) (red)
moving over 2 mph (3 km/h) with the parking brake set.
(EPA07)
Indicates the parking brake is engaged, or hydraulic brake
Parking/Emergency Brake Warning fluid pressure is low. A buzzer activates when the vehicle is
(BRAKE) (red)
moving over 2 mph (3 km/h) with the parking brake set.
(EPA10)
Cruise Control Activated (green)
Indicates the cruise control is active.
Fasten Seat Belt Warning (red)
Illuminates for 15 seconds when the ignition key is turned to
the ON position.
Instruments
Warning and Indicator Lights
NO
CHARGE
Water in Fuel Warning (amber)
Indicates that the fuel could contain water.
Low Battery Voltage Warning (red)
Indicates battery voltage is 11.9 volts or less.
No Charge Warning (amber)
Indicates an alternator charge output failure.
Check Transmission Temperature
Indicates high transmission temperature.
Check Transmission
Indicates a transmission issue.
Overhead Instrument Panel,
Optional
Speedometer and Tachometer
The overhead instrument panel (Fig. 3.11), if installed, holds the citizen’s band (C/B) radio, a microphone clip, and any switches that can not be accommodated on the driver’s or auxiliary dash panels.
Three kinds of speedometer face (Fig. 3.12) are
available. The U.S. version of the speedometer registers speed in both miles per hour (mph) and kilometers per hour (km/h), with mph in the larger numbers.
The underside of the overhead console also holds
the sun visors and the optional dome/reading light
assembly. For more information on the dome/reading
light assembly, see Chapter 4.
The NAFTA version of the speedometer face reverses this arrangement, with km/h in the larger
numbers. The metric only version (not shown) shows
km/h exclusively.
1
2
Speedometer
3
4
1
f680028
04/19/2002
1. Storage Area with Netting
2. C/B Radio
3. Microphone Clip
4. Dome/Reading Light Assembly
Fig. 3.11, Overhead Instrument Panel
3.10
Instruments
Tachometer, Optional
point, the engine will derate or shut down, depending
on the type of engine protection system installed.
The tachometer (Fig. 3.12) indicates engine speed in
revolutions per minute (rpm) and serves as a guide
for shifting the transmission and keeping the engine
in the appropriate rpm range. For low idle and rated
rpm, see the engine identification plate.
50
PSI
15
20 25
35
30
25
10
15
5
45
70
50
5
RPM
X100
90
0
65
110
30
100
OIL
75
130
10
0
55
85
10/09/2001
km/h
f610528
MPH
Fig. 3.13, Engine Oil Pressure Gauge
1
2
10/09/2001
f610527
1. Tachometer
2. Speedometer
Fig. 3.12, Speedometer and Tachometer
Standard Instruments
Standard instruments are supplied with the instrument cluster and should be present on every vehicle,
with the following exceptions:
• The tachometer is optional on all vehicles.
• The transmission temperature gauge is op-
tional on all vehicles.
Engine Oil Pressure Gauge
NOTICE
A sudden decrease or absence of oil pressure
may indicate mechanical failure. Bring the vehicle
to a safe stop and investigate the cause to prevent further damage. Do not operate the engine
until the cause has been determined and corrected.
The engine oil pressure gauge (Fig. 3.13) displays
the current engine oil pressure. If engine oil pressure
falls below the preset levels shown in Table 3.1, first
the check engine light will illuminate, and, if the condition does not improve, the engine protection light
will also illuminate and the buzzer will sound. At this
3.11
Engine Model
Detroit Diesel
Cummins
Mercedes-Benz
MBE900
Caterpillar 3126
Oil Pressure*
At Idle Speed:
psi (kPa)
14 (97) min.
15 (103)
At Rated RPM:
psi (kPa)
55 (350) min.
35 (241) min.
7 (50)
36 (250)
10–20 (69–138)
30–45 (207–310)
* Oil pressures are given with the engine at operating temperature. With
the engine cold, oil pressure may be higher. Individual engines may vary
from the listed pressures; observe and record pressures when the engine
is new to create a guide for checking engine condition.
Table 3.1, Oil Pressure Specifications
Coolant Temperature Gauge
NOTICE
A sudden increase in coolant temperature may
indicate engine or cooling system failure. Bring
the vehicle to a safe stop and investigate the
cause to prevent further damage. Do not operate
the engine until the cause has been determined
and corrected.
During normal engine operation, the coolant temperature gauge (Fig. 3.14) should read 175 to 195°F
(79 to 91°C). If the temperature remains below 160°F
(71°C) or exceeds the maximum temperature shown
in Table 3.2, inspect the cooling system to determine
the cause. See the M2 Workshop Manual for troubleshooting and repair procedures.
Instruments
If coolant temperature rises above the preset levels
shown in Table 3.2, first the check engine light will
illuminate, and, if the condition does not improve, the
engine protection light will also illuminate and the
buzzer will sound. At this point, the engine will derate
or shut down, depending on the type of engine protection system installed.
200
275
F
125
350
TRANS
150
200
10/30/2001
f610600
Fig. 3.15, Transmission Fluid Temperature Gauge
F°
100
Under heavy loads, such as when climbing steep
grades, temperatures may, for limited periods, climb
above those given here.
250
WATER
10/09/2001
f610565
Fig. 3.14, Coolant Temperature Gauge
Maximum Coolant Temperature
Engine Make
Temperature: °F (°C)
Detroit Diesel
215 (101)
Cummins
225 (107)
Mercedes-Benz
222 (105)
MBE900
Caterpillar 3126
230 (110)
Fuel Level Gauge, Pre-EPA10
On vehicles that are pre-EPA10 compliant, the fuel
level gauge indicates the level of diesel in the fuel
tank(s). See Fig. 3.16. A single fuel gauge is standard. If equipped with a second (optional) fuel gauge,
each fuel tank level is indicated on a separate
gauge.
1/2
Table 3.2, Maximum Coolant Temperature
Transmission Fluid Temperature
Gauge
E
The transmission fluid temperature gauge is optional
and available on all vehicles.
During normal operation, the transmission fluid temperature gauge (Fig. 3.15) reading should not exceed 250°F (121°C) at the sump.
NOTICE
A sudden increase in transmission fluid temperature that is not caused by a load increase may
indicate mechanical failure. Bring the vehicle to a
safe stop and investigate the cause to prevent
further damage. Do not operate the vehicle until
the cause has been determined and corrected.
F
FUEL
10/09/2001
f610566
Fig. 3.16, Fuel Level Gauge, Pre-EPA10
Fuel/Diesel Exhaust Fluid (DEF)
Gauge, EPA10
For engines that are EPA10 compliant, the fuel and
DEF levels are measured in a dual purpose fuel/DEF
gauge. See Fig. 3.17.
The diesel fuel level is indicated at the top of the
gauge, with a low-fuel warning lamp that illuminates
3.12
Instruments
1
1/2
ULTRA LOW SULFUR
DIESEL FUEL ONLY
E
4
F
1
DEF
E
F
3
2
08/21/2009
1. Diesel Fuel Level
Indicator
2. DEF Level Indicator
3. Low DEF Warning
Lamp (amber below
10% DEF)
f611045
4. Low Fuel Warning
Lamp (amber at 1/8
tank of fuel)
Fig. 3.17, Fuel/DEF Gauge, EPA10
amber when the diesel fuel level registers 1/8th of
capacity. The DEF level is indicated in the lightbar on
the lower portion of the gauge. There is a low DEF
level warning lamp that illuminates amber when the
DEF level reaches 10% of capacity. See Chapter 11,
for details of the DEF gauge functions.
Primary and Secondary Air Pressure
Gauges
WARNING
If air pressure falls below minimum pressure, the
braking ability of the vehicle will be limited. Slow
the vehicle down and bring it to a gradual stop.
Do not attempt to move the vehicle until air pressure has risen above the minimum level. Moving
a vehicle without adequate braking power could
cause an accident resulting in personal injury or
death.
2
10/22/2009
f610567
1. Primary Air Pressure Gauge
2. Secondary Air Pressure Gauge
Fig. 3.18, Air Pressure Gauges
buzzer, connected to both the primary and secondary
systems, activate when air pressure in either system
drops below a minimum pressure of 65 to 75 psi
(448 to 517 kPa).
When the engine is started, the warning light and
buzzer remain on until air pressure in both systems
exceeds minimum pressure.
Voltmeter
The voltmeter is a digital readout located on the bottom line of the dash message center whenever the
ignition switch is turned on. See Fig. 3.8 for 2004
engines, or see Fig. 3.9 for EPA07 engines, or see
Fig. 3.10 for EPA10 engines.
Air pressure gauges (Fig. 3.18) register the pressure
in the primary and secondary air systems. Normal
pressure with the engine running is 100 to 120 psi
(689 to 827 kPa) in both systems.
It indicates the vehicle charging system voltage when
the engine is running and the battery voltage when
the engine is stopped. By monitoring the voltmeter,
the driver can be aware of potential charging system
problems and have them fixed before the batteries
discharge enough to create starting difficulties.
Air pressure gauges are required on all vehicles with
air brakes. A low-air-pressure warning light and
The voltmeter will normally show approximately 13.7
to 14.1 volts when the engine is running. The voltage
3.13
Instruments
of a fully charged battery is 12.7 to 12.8 volts when
the engine is stopped. Battery voltage under 12.0
volts is considered a low battery, and a completely
discharged battery will produce only about 11.0 volts.
The voltmeter will indicate lower voltage as the vehicle is being started or when electrical devices in
the vehicle are being used.
If the voltmeter shows an undercharged or overcharged condition for an extended period, have the
charging system and batteries checked at a repair
facility.
Optional Instruments
Optional instruments are not found on every vehicle.
They are stand-alones, not driven by the instrument
cluster, and are usually located on the auxiliary dash
panel. They are listed here in alphabetical order, to
make the information easier to find.
Axle Oil Temperature Gauges,
Forward and Rear
NOTICE
A sudden increase in oil temperature that is not
caused by a load increase may indicate mechanical failure. Bring the vehicle to a safe stop and
investigate the cause to prevent further damage.
Do not operate the engine until the cause has
been determined and corrected.
During normal operation, optional axle oil temperature gauges (Fig. 3.20), both forward and rear,
should read between 160 and 220°F (71 and 104°C)
for Meritor™ drive axles.
Ammeter
An optional ammeter (Fig. 3.19) measures current
flowing to and from the battery. When the batteries
are being charged, the meter needle moves to the
plus side of the gauge; when the batteries are being
discharged, the needle moves to the minus side. A
consistent negative reading when the engine is running indicates a possible problem with the charging
system.
10/10/2001
f610571
Fig. 3.20, Axle Oil Temperature Gauge
Under heavy loads, such as when climbing steep
grades, temperatures up to a maximum of 250°F
(121°C) are not unusual.
Digital Clock
10/10/2001
f610573
The optional digital clock (Fig. 3.21) has black characters on a constantly backlighted green display, with
a brightness that automatically adjusts for day or
night. The clock has a 24-hour alarm, with a threeminute snooze feature.
1.
Fig. 3.19, Ammeter
To set the time of day:
1.1
Push the Run/Set (lower) switch to the
right (TIME-SET position).
NOTE: When the hour setting is for a time
between noon and midnight, the small letters
3.14
Instruments
10/11/2001
3.1
With the alarm time set, push the alarm
(upper) switch to the left. An alarm "wave"
symbol and the letters "AL" will appear in
the upper left corner of the display when
the alarm is on.
3.2
When the displayed time of day coincides
with the alarm time, the alarm will sound.
If the SNOOZ button is not pushed or the
alarm switch is not moved, the alarm will
automatically stop sounding after 1 minute
and will not sound again for 24 hours.
3.3
If desired, press the SNOOZ button while
the alarm is sounding to shut the alarm off
for 3 minutes. The alarm symbol will flash
in the display when the button is pushed
and will continue to flash until the alarm
switch is moved or the alarm has sounded
for one minute. The snooze procedure can
be done as many times as desired.
3.4
Move the alarm switch to the right when
you wish to shut off or cancel the alarm;
the alarm symbol will disappear.
f610576
Fig. 3.21, Digital Clock
"PM" will appear in the lower left corner of
the display; no "PM" display indicates an
A.M. setting.
1.2
1.3
1.4
2.
Advance the minute setting by repeatedly
pushing, or pushing and holding the
minute button as needed.
Push the Run/Set switch to the middle
(RUN) position.
To set the alarm time:
2.1
3.
Advance the hour setting to the correct
number by pushing and releasing the hour
button as many times as needed. Or if the
button is pressed and held in for longer
than 2 seconds, the numbers will continue
to advance until the button is released.
Push the Run/Set switch to the left
(ALARM-SET position).
2.2
Set the alarm time by using the same procedure that you used to set the time of
day; remember to set the hour for A.M.
(no letters in the corner of the display), or
P.M. as desired.
2.3
Return the Run/Set switch to the middle
(RUN) position; the readout will return to
the time-of-day setting.
To operate the alarm:
Engine Oil Temperature Gauge
NOTICE
A sudden increase in oil temperature that is not
caused by a load increase may indicate mechanical failure. Bring the vehicle to a safe stop and
investigate the cause to prevent further damage.
Do not operate the engine until the cause has
been determined and corrected.
NOTICE
A sudden increase in oil temperature that is not
caused by a load increase may indicate mechanical failure. Bring the vehicle to a safe stop and
investigate the cause to prevent further damage.
Do not operate the engine until the cause has
been determined and corrected.
During normal operation, the optional engine oil temperature gauge (Fig. 3.22) should read in the following temperature range:
• 177 to 203°F (81 to 95°C) for Mercedes-Benz
MBE900 engines;
3.15
Instruments
• 160 to 195°F (71 to 91°C) for Caterpillar 3126
engines;
• 200 to 260°F (93 to 126°C) for Detroit Diesel
and Cummins engines.
Under heavy loads, such as when climbing steep
grades, temperatures that exceed the normal oil temperature range for a short period are not unusual.
10/10/2001
f610568
Fig. 3.23, Intake-Air Restriction Indicator
10/10/2001
f610569
NOTE: Rain or snow can wet the filter and
cause a higher than normal reading temporarily.
Fig. 3.22, Engine Oil Temperature Gauge
Under heavy loads, such as when climbing steep
grades, temperatures that exceed the normal oil temperature range for a short period are not unusual. If
the temperature returns to normal when the load decreases, there is no problem.
Intake-Air Restriction Vacuum Readings
Service inH2O
Initial inH2O
Engine Make*
Cummins
12
25
Detroit Diesel
12
20
Mercedes-Benz
12
20
Caterpillar
15
25
Intake-Air Restriction Indicator
* Turbocharged engines must be checked at full load and governed engine speed.
The intake-air restriction indicator measures the
vacuum on the engine side of the air cleaner at the
air cleaner outlet. On standard installations, it is
mounted on the intake air piping in the engine compartment.
As an option for easier viewing, the intake-air restriction indicator (Fig. 3.23) can be mounted on the
dash, usually on the right-hand control panel.
Intake-air restriction vacuum is measured in inches of
water (inH2O).
If the yellow signal stays locked in the red zone, at or
above the values shown in Table 3.3 after the engine
is shut down, the air cleaner needs to be serviced.
The indicator then needs to be reset by pressing the
black button on the bottom of the indicator.
Table 3.3, Intake-Air Restriction Vacuum Readings
Vehicles may be equipped with an optional go/no-go
restriction indicator without graduations (Fig. 3.24).
Pyrometer
A pyrometer registers the exhaust temperature near
the turbocharger. Normal exhaust temperatures are
700 to 1100°F (370 to 595°C). See Fig. 3.25.
Variations in engine load can cause exhaust temperatures to rise as high as 1100°F (600°C). If the
pyrometer reading shows that exhaust temperature
exceeds normal, reduce fuel to the engine until the
exhaust temperature is reduced. Shift to a lower gear
if the engine is overloaded.
Variations in engine load can cause exhaust temperatures to vary. If the pyrometer reading shows
3.16
Instruments
04/08/2005
f090431
Fig. 3.24, Manual-Reset Air Restriction Indicator, Go/
No-Go
10/10/2001
f610574
Fig. 3.26, Turbo Boost Pressure Gauge
Collision Warning System,
Eaton VORAD EVT–300
WARNING
10/10/2001
f610570
Fig. 3.25, Pyrometer
that exhaust temperature exceeds normal, reduce
fuel to the engine until the exhaust temperature is
reduced. Shift to a lower gear if the engine is overloaded.
Turbocharger Boost Pressure Gauge
A turbocharger boost pressure gauge (Fig. 3.26)
measures the pressure in the intake manifold, in excess of atmospheric pressure, being created by the
turbocharger.
The Eaton VORAD EVT–300 Collision Warning
System (CWS) is intended solely as an aid for an
alert and conscientious professional driver. It is
not intended to be used or relied on to operate a
vehicle. Use the system in conjunction with rearview mirrors and other instrumentation to safely
operate the vehicle. Operate this vehicle,
equipped with the EVT–300 Collision Warning
System, in the same safe manner as if the EVT–
300 Collision Warning System were not present.
The EVT–300 Collision Warning System is not a
substitute for safe, normal driving procedures,
nor will it compensate for any driver impairment,
such as drugs, alcohol, or fatigue.
The EVT–300 Collision Warning System may provide little or no warning of hazards such as pedestrians, animals, oncoming vehicles, or cross
traffic.
On vehicles with SmartCruise, the vehicle will not
deactivate cruise control for stationary targets,
such as a car stopped in your traveling lane.
Failure to drive safely and use the system properly could result in personal injury and/or death
and severe property damage.
The Eaton VORAD EVT–300 is a computerized collision warning system (CWS) that uses front-mounted
3.17
Instruments
mode, and if so configured, failure of the driver
to enter the ID card.
(and side-mounted) radar to continuously monitor
vehicles ahead of and alongside your vehicle.
• A photo light sensor automatically adjusts alert
NOTE: The side-mounted radar is optional and
not installed on all vehicles with a CWS.
The CWS warns of potentially dangerous situations
by means of visual and audible alerts. It performs in
fog, rain, snow, dust, smoke, and darkness. To be
detected, objects must be within the radar beam’s
field of view and provide a surface area that can reflect back the radar beam. The beam sweeps an
area of 12 degrees in the horizontal plane and 5 degrees in the vertical plane. This allows the determination of the distance to, relative speed of, and angle
to the target of vehicles and objects ahead.
The forward-looking antenna transmits radar signals
to, and receives them back from, vehicles and objects ahead. It only reports those that are within your
lane. Road curvature information is provided by a
yaw rate sensor in the CPU, which shapes the radar
detection zone to the curve. The yaw sensor also
functions during turns.
An optional side sensor(s), not installed on all vehicles with a CWS, is mounted on the side of the vehicle. It transmits and receives radar signals for a
distance of 2 to 10 feet (0.5 to 3 meters), alongside
your vehicle. The side sensor can detect unseen vehicles and objects alongside your vehicle, moving
and stationary, in a 15-degree vertical by 15-degree
horizontal beam pattern.
Refer to the Eaton website for additional information,
www.roadranger.com.
Driver Display Unit (DDU)
and indicator light brightness depending on cab
lighting conditions.
• A small speaker provides audible alert tones to
warn of closing on an object ahead and, when
equipped with an optional side sensor, of objects alongside when the turn signal is activated in preparation for a lane change.
• Additional tones indicate speaker volume, sys-
tem failure, driver’s card status, and data extraction pass or fail.
See Table 3.4 for descriptions of the various alert
lights and tones.
Yellow
Yellow
and
Orange
Yellow
and
Orange
Yellow,
Orange
and Red
Yellow,
Orange
and Red
The DDU controls system power, range for vehicle
warnings, speaker volume, and all other system functions. At the lower front edge of the DDU, a slot is
provided to insert the optional driver’s identification
(ID) card.
• Alert and indicator lights advise of multiple
None
Following distance 2-3 seconds
(second alert).
Single
Following distance 1-2 seconds
(target vehicle slows).
Double
Following distance 0-1 seconds
(target vehicle slows).
Continuous
Following distance 1/2 second or
(twice per
less (or slow-moving vehicle).
second)
Table 3.4, Alert Lights and Tones, DDU
NOTE: All system controls are located on the
Driver Display Unit (DDU).
The DDU contains the controls and indicators
needed to operate the system. See Fig. 3.27. Indicators to inform the driver about the system’s operation
are located on both the DDU and the optional side
sensor display.
Alert Lights and Tones, DDU
Tone
Description
None
Object detected (first alert).
Proximity alarm with vehicle
Double
moving at less than 2 mph (3
km/h).
Light
Yellow
Use the following instructions to operate the DDU
controls and interpret the data provided by the CWS:
1.
Push in the volume control and power ON/OFF
knob to turn power on or off. Turn the knob left
or right to increase or decrease speaker volume.
NOTE: The system may be configured to have
no on/off capability. If the vehicle does not have
ON/OFF control at the DDU, hold in the volume
control knob while turning the ignition switch to
the ON position.
warning levels, system power, failure display
3.18
Instruments
5
4
3
6
2
ON
SC
FAIL
7
1
VOLUME
RANGE
WARNING LEVEL
11
10
9
EATON VORAD
12
8
04/06/2001
1.
2.
3.
4.
5.
6.
Red System Failure Indicator Light
Green Power ON/Driver’s Card Status Indicator Light
Volume Control and Power ON/OFF Knob
Speaker
Range Control Knob
Green SC Indicator Light
7.
8.
9.
10.
11.
12.
f610486
Photo Light Sensor
Driver’s ID Card Slot
Red Alert Light
Orange Alert Light
Yellow Alert Light
Distance/Danger Alert Lights
Fig. 3.27, Driver Display Unit (EVT-300)
2.
At startup, a power-on LED test takes place. All
the indicator and alert lights illuminate. The
green SC indicator light will flash eight times.
3.
If the system’s configuration requires, insert the
driver’s ID card in the slot at the lower front edge
of the DDU. A high-pitched tone will sound when
the driver’s ID card has been successfully read.
One low tone will sound if the driver’s card has
been unsuccessfully read.
NOTE: The green power ON light blinks continuously if the system is on, configured to require a
driver’s ID card, and the card is not inserted.
4.
The speaker is located under the top cover of
the DDU. It sounds audible tones to alert the
driver to potential hazards.
NOTE: The system may be configured so that
range control can not be adjusted by the driver.
6.
NOTE: All warnings apply only to objects within
the maximum detection range and in your lane.
Proximity alarm tones and vehicle-closing 1/2second and two-second following interval tones
are configured items.
7.
First Alert: The yellow alert light illuminates when
an object is detected within the system’s maximum range of 350 feet (107 meters) on a
straight road. Range is reduced in curves by the
turn radius of the curve. This light also illuminates when the proximity alarm threshold is
crossed.
8.
Second Alert: Both the yellow and orange alert
lights illuminate when your vehicle is within a
NOTE: The system may be configured so that
volume control may be restricted to a range
above a minimum level.
5.
3.19
To adjust the first alert detection range from 3
seconds down to 2 seconds, rotate the range
control knob from left to right. This will also
change the second alert detection range from 2
seconds down to 1.75 seconds.
Proximity Alarm: If your vehicle is traveling less
than 5 mph (8 km/h) and an object is detected
less than 15 feet (4.5 meters) in front of your vehicle, and the closing rate is less than 2 mph (3
km/h) but more than 1/2 mph (1 km/h), the proximity alarm activates (the yellow alert light illuminates and a low-frequency double tone sounds).
Instruments
3-second following interval behind another vehicle in the same lane. If you are within a
2-second following interval, and closing on the
vehicle ahead, a warning tone will also sound.
9.
1
Third Alert: All three alert lights, yellow, orange,
and red, illuminate when you are 1 second (or
less than 1 second) behind a vehicle. If the vehicle ahead is opening the interval, no tone will
sound. If you are closing the interval, double
tones will sound. Within a 1/2-second or less following interval, opening or closing, the tones will
repeat twice per second.
2
3
10. If a stationary vehicle or object, or an object
moving less than 3.4 mph (5.5 km/h), is detected
within 220 feet (67 meters) and within 3 seconds,
all three alert lights will illuminate and the double
tones will sound. This warning overrides all others and is not affected by the range control knob
setting.
IMPORTANT: The system is disabled in turns
with a radius of less than 750 feet (230 meters),
and when the brakes are applied.
11. All tones are disabled in sharp turns or when the
brakes are applied. If the configuration permits,
the three-second and two-second alert levels
may be adjusted with the range control knob. A
single low-frequency tone sounds when a system
failure is detected. A medium-frequency tone
sounds when the volume control level is
changed.
12. Successful downloading of Eaton Vehicle Infor-
mation Management System (EVIMS) data will
cause a double tone to sound. Unsuccessful
downloading will cause a low-frequency tone to
sound.
13. The photo light sensor senses lighting conditions
and automatically adjusts the intensity of the indicator and alert lights.
Side Sensor Display
1.
The yellow indicator light (Fig. 3.28) illuminates
continuously when no vehicle is detected by the
side sensor(s).
2.
The photo light sensor senses lighting conditions
and automatically adjusts the intensity of indicator and alert lights.
01/27/97
f601259
1. Red Alert Light (vehicle or object detected)
2. Photo Light Sensor
3. Yellow Indicator Light (no vehicle or object detected)
Fig. 3.28, Side Sensor Display (EVT-300)
3.
The red alert light illuminates when objects are
detected by the side sensor(s).
3.1
If the right turn signal is activated and the
side sensor detects an object, the red
alert light will illuminate and the DDU
speaker will sound a high-frequency
double tone. This tone is sounded only
once per activation of the turn signal.
3.2
The red light will also illuminate and stay
on if a failure of the side sensor is detected.
Special Road Situations
WARNING
The Eaton VORAD EVT–300 Collision Warning
System (CWS) is intended solely as an aid for an
alert and conscientious professional driver. It is
not intended to be used or relied on to operate a
vehicle. Use the system in conjunction with rearview mirrors and other instrumentation to safely
operate the vehicle. This system will not warn of
many possible hazards. Do not assume it is "all
clear" if no alert lights are illuminated.
3.20
Instruments
Failure to drive safely and use the system properly could result in personal injury and/or death
and severe property damage.
WARNING
Certain special road situations may affect the system’s ability to detect objects. These situations include the effects of curves, dips, and hills that may
provide an unexpected result:
Heavy rain or water spray at the side sensor may
cause both the yellow and red lights on the side
sensor display to illuminate at the same time.
Under these conditions the system is temporarily
unable to provide adequate warnings.
NOTE: A warning may sound when an object is
detected in front of the vehicle even though the
driver intends to turn away or stop before reaching the object.
Failure to drive safely and use the system properly could result in personal injury and/or death
and severe property damage.
• When an object is detected in a very sharp
right- or left-hand turn, the audible alarm will
not sound.
• When approaching a curve, before turning into
it, alarms may sound and lights illuminate because of an object off the road, directly in line
with your vehicle. This will not occur when the
brakes are applied.
• Elevated obstacles such as overpasses and
overhead signs may be detected when approaching a roadway descending to a lower
elevation.
• Vehicles cannot be detected on the other side
of a hill. An alarm will not sound until the object
is within the field of view of the antenna assembly.
• On approaching a steep hill, objects above the
beam cannot be detected. Generally, the beam
hitting the road surface does not cause an
alarm.
• The side sensor only detects objects within its
field of view, next to the tractor. A vehicle farther back, behind the field of view, will not be
detected.
• The side sensor range is set to detect average
sized vehicles, 2 to 10 feet (0.5 to 3 meters)
away, in the adjacent lane. The side sensor
provides a 15-degree vertical by 15-degree
horizontal beam pattern.
• The radar beam of the CWS will detect near
range cut-ins of approximately 30 feet (9
meters) or less, depending on the angle of entrance into the lane in front of your vehicle.
NOTE: A continuous fixed object on the right
side of the vehicle such as a guard rail, wall,
tunnel, or bridge may cause the side sensor
alert light to stay on.
In Case of Accident
The optional accident reconstruction capability provides two segments of system data, one of which
can be stored in system memory.
1.
Push and hold the DDU range knob for at least 5
seconds to store the first segment.
IMPORTANT: If the range knob is pushed again,
a fail tone will sound.
2.
Within 6 seconds, the green SC indicator light
will blink rapidly 8 times, confirming that the data
has been saved.
3.
After the first segment is saved, the second segment runs continuously but only contains the last
10 minutes (approximately) of system data.
NOTE: Once the first memory segment is frozen, the other can’t be frozen. Only by disconnecting the main CPU connector can the second memory segment be preserved. You must
return the CPU to Eaton VORAD for downloading and interpretation of accident reconstruction
data.
4.
The system will cease recording data 30 seconds after the vehicle comes to a stop.
5.
After 30 days from the date the memory was frozen, the information will be cleared automatically.
Maintenance and Diagnostics
IMPORTANT: Servicing the Eaton VORAD EVT–
300 Collision Warning System should be done
3.21
Instruments
only by qualified technicians. Special skills and
equipment are required. Take your vehicle to an
authorized Freightliner service facility for repairs,
or contact Eaton VORAD at (800) 826-4357.
1.
Keep the antenna assembly and side sensor(s)
free of a buildup of mud, dirt, ice, or other debris
that might reduce the system range.
2.
The system tests itself continuously and evaluates the results every 15 seconds. If a problem
is detected with the front radar system, the red
FAIL light on the DDU illuminates continuously as
long as the failure is active. The corresponding
fault code is stored in the CPU memory.
3.
When the system is placed in failure display
mode, both active and inactive fault codes can
be indicated by the DDU. Inactive faults are
those that have occurred and have been cleared.
Active faults are those that are still present.
4.
Fault codes provide the driver the ability to
record the system faults during a trip and to notify his maintenance department or Eaton
VORAD. In this mode, specific fault codes are
indicated by the pattern of blinks of the driver
display unit red FAIL light.
5.
Each fault code is a two-digit number, as shown
in the Eaton VORAD Collision Warning System
Driver Instructions. The red FAIL light blinks the
same number of times as the first digit, a pause
of approximately 3/4 of a second follows, then
the light blinks the same number of times as the
second digit.
6.
Display the fault codes.
6.1
6.5
If no faults are found, or after all the current fault codes have been issued, a code
41 is blinked out to indicate the end of the
sequence.
Press and hold the DDU volume control
and power ON/OFF knob for at least 9
seconds.
IMPORTANT: The system will turn off if you
release the knob before 9 seconds have
passed.
6.2
Continue pressing the knob until the FAIL
light begins to blink.
6.3
After 9 seconds, the DDU FAIL light begins to blink out the first fault code.
6.4
After finishing one code, the system waits
3 seconds, and then begins the next fault
code.
3.22
4
Controls
Ignition Switch and Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
Lighting Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
Multifunction Turn Signal Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5
Horn Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7
Powertrain Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.8
All-Wheel-Drive Controls, Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.12
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.13
Adjustable Steering Column . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.14
Other Dash-Mounted Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.14
Heater/Air Conditioner Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.15
Seat Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.16
Controls
Ignition Switch and Key
WARNING
The ignition switch (Fig. 4.1) has four positions: ACCESSORY, OFF, ON, and START. In addition, the
same key locks and unlocks the cab doors.
Do not attempt to modify, add, splice, or remove
electrical wiring on this vehicle without authorization from Freightliner Engineering. Doing so
could damage the electrical system and result in
a fire that could cause serious personal injury or
property damage.
There are two new electrical modules, a master module located near the frontwall (bulkhead module) and
a slave module located between the frame rails
(chassis module).
This new wiring system features intelligent controls
that blink to show switch activity and error conditions.
These controls cannot be distinguished by their appearance, only by their function.
09/12/2001
f610509
Fig. 4.1, Ignition Switch Positions
In the OFF position, the key slot is vertical; the key
can be inserted and removed only in this position.
The following can be operated in the off position (regardless of whether the key is inserted): The lowbeam headlights, taillights, brake lights, road lights,
dome lights, clearance lights, turn signals, hazard
warning lights, horn, CB radio, power windows, cigarette lighter, clock, and electric oil pan heater.
In the ACCESSORY position, the key is turned counterclockwise. The radio, stereo system, mirror heat,
air dryer, backup lights, and all of the electrical systems that are operable in the off position are operable in the accessory position.
In the ON position, the key is turned clockwise and
all electrical systems are operable. The low air pressure and low oil pressure warning lights (or messages) and buzzer operate until the engine is started
and pressure is built up.
Electrical System
The Business Class® M2 features a new type of
electrical system, different from any previous vehicle.
Multiple electrical signals are carried along a simplified set of wires, reducing the size of wiring bundles.
There are significantly fewer wires overall, meaning
less chance of damage, shorts and other problems.
For more information about these controls, see under
the headings "Axle Switches" and "Suspension
Dump Switch."
Lighting Controls
The lighting controls mentioned under this heading
generally operate through switches located on the
dash.
Two types of dash switches are used:
• Paddle switches with a single paddle located in
the center of the switch. The paddle can be
raised or lowered to perform a function.
• Rocker switches that can be pressed at either
the upper or lower end to perform a function.
Certain rocker switches are guarded to prevent
them from being switched on or off accidentally.
When the panel lights are on, most switch legends
are backlit with a colored light, usually green. This
allows the driver to find the switch more easily in the
dark. When the switch is on, the switch icon is normally backlit with a colored light, usually amber.
Some switch icons are dead-fronted (not visible until
the switch is turned on). When turned on, some
switches are illuminated from within by a red or
amber LED (light-emitting diode).
Control Panels
The left-hand control panel (Fig. 4.2) contains a louvered window outlet for the face vents of the heating,
4.1
Controls
ventilation, and air conditioning system (HVAC), and
four switches arranged in a vertical line, usually the
headlight, panel light increase/decrease, and the
cruise control On/Off and Set/Resume switches.
The HVAC climate control panel is on a separate
panel below the auxiliary dash panel, between the
two cupholders.
Exterior Light Controls
Headlight/Parking Light Switch
2
3
4
1
The headlight/parking light switch (Fig. 4.3) is a
paddle switch located on the left-hand control panel
above the cruise control switches. When the paddle
is lowered, the parking lights illuminate (the front turn
signals, the cab marker and identification lights, and
the taillights). When the paddle is raised, the lowbeam headlights illuminate, along with all the parking
lights. To turn off all lights, return the paddle to the
center position.
5
f610579a
10/15/2001
1.
2.
3.
4.
5.
Left-Hand Control Panel
Instrumentation Control Unit
Right-Hand Control Panel
Radio Panel
Auxiliary Dash Panel
Fig. 4.2, Switch and Gauge Panels
The instrument cluster (ICU3-M2) is located right behind the steering wheel. No controls are installed on
the standard instrument cluster.
The right-hand control panel (Fig. 4.2) usually contains the transmission push-button shift selector (on
vehicles with automatic or automated transmission)
and the trailer brake lever (hand control valve). On
vehicles with manual transmission, a variety of
switches are installed here. If there is a dashmounted air-restriction indicator, it is often mounted
here.
The radio panel contains two louvered dash outlets
for the face vents of the HVAC, one on either side of
the radio (if installed).
The auxiliary dash panel (Fig. 4.2) below the radio
panel contains the marker interrupt switch, the air
brake valve knobs, the cigarette lighter, and a variety
of switch options.
10/15/2001
f610580
Raise the paddle to illuminate the headlights, low beam.
Lower the paddle to illuminate the parking lights.
Fig. 4.3, Headlight/Parking Light Switch
NOTE: The front turn signal is the amber lens in
each headlight unit. The low-beam headlight is
the top clear lens in each headlight unit.
When the headlights or parking lights are on, the
panel lights also illuminate. An amber light in the
switch backlights either the top icon (for headlights
and parking lights) or the bottom icon (for parking
lights only).
Panel Light Increase/Decrease Switch
When the panel lights are on, they can be either
brightened or dimmed by using the INCR/DECR
rocker switch just below the headlight switch
(Fig. 4.4). To brighten the panel lights, press on the
upper part of the rocker (at the INCR legend). To dim
4.2
Controls
the panel lights, press on the lower part of the rocker
(at the DECR legend).
f610581
05/09/2002
Raise the paddle to flash the marker lights.
10/29/2001
f610598
Fig. 4.4, Panel Light Increase/Decrease Switch
When the panel lights are on, both legends are backlit in green.
Daytime Running Lights
Switching on the ignition and releasing the parking
brakes automatically activates the daytime running
lights, if equipped. The daytime running lights will
operate until the parking brakes are applied or the
headlights are turned on.
Fig. 4.5, Marker Light Interrupt Switch
The low beam headlights must be turned on before
the road lights can be turned on. The road lights will
not illuminate if the high beam headlights are already
on, and switching from low beams to high beams will
switch off the road lights.
To turn the road lights on, press on the upper part of
the rocker (at the road light icon). See Fig. 4.6. To
turn the road lights off, press on the lower part of the
rocker (at the ROAD LAMP legend).
NOTE: Daytime running lights are standard on
all Canadian vehicles.
The daytime running lights illuminate at about twothirds of normal power.
Marker Light Interrupt Switch
The marker light interrupt (MRKR INT) paddle switch
temporarily flashes the marker lights and taillights
(Fig. 4.5). With the vehicle lights on, raise the paddle
to briefly turn off the marker lights and taillights. With
the vehicle lights off, raise the paddle to briefly turn
on the marker lights and taillights.
Turning off the vehicle lights automatically turns off
the marker lights. When the panel lights are on, the
marker light icon and MRKR INT legend are backlit
in green.
Road Light Switch, Optional
The road light (ROAD LAMP) rocker switch operates
the optional road lights, which are recessed into the
front bumper or mounted on the lower edge of a cutout in the center of the front bumper.
4.3
f610582
10/15/2001
Fig. 4.6, Road Light Switch
When the road lights are on, the road light icon is
backlit in amber. When the panel lights are on, the
ROAD LAMP legend is backlit in green.
Utility Light Switch, Optional
The utility light switch operates one of the following
lights or sets of lights:
• A single round utility light swivel-mounted in
the center of the cab roof;
Controls
• Two round utility lights mounted in fixed posi-
tions on each side of the cab roof;
• Two flush-mounted utility lights mounted on the
back of the cab, one on each side.
To turn the utility light(s) on, press in on the upper
part of the utility light (UTLY LAMP) rocker switch
(Fig. 4.7). To turn the utility light(s) off, press on the
lower part of the rocker (at the UTLY LAMP legend).
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10/15/2001
Fig. 4.8, Spotlight Switch
Dome Lights
Diffuse dome lights are installed on all cabs. The
standard dome light has a clear lens and is installed
on the back of the cab above the rear window. See
Fig. 4.9 for the rear dome light.
f610583
10/15/2001
Fig. 4.7, Utility Light Switch
When the utility lights are on, the diagonal light beam
icon is backlit in red. When the panel lights are on,
the UTLY LAMP legend is backlit in green.
Spotlight, Optional
The spotlight switch operates one of the following
lights or sets of lights:
• A single spotlight and pivoting handle assembly
mounted on the driver’s door;
• Two spotlights and pivoting handle assemblies
mounted, one on each side, on both the driver’s and passenger’s doors.
To turn the spotlight(s) on, press in on the upper part
of the spotlight (SPOT LAMP) rocker switch
(Fig. 4.8). To turn the spotlight(s) off, press on the
lower part of the rocker (at the SPOT LAMP legend).
When the spotlight(s) is on, the diagonal light beam
icon is backlit in red. When the panel lights are on,
the SPOT LAMP legend is backlit in green.
10/16/2001
f543926
To remove the lens, press in at the mounting tabs
(arrows).
Fig. 4.9, Rear Dome Light
On cabs with an overhead console, there is an optional overhead dome light assembly containing a
diffuse dome and a clear reading light. See Fig. 4.10
for the optional dome/reading lights on the overhead
console.
Interior Lights and Light Controls
Light Replacement
Rear Dome Light
The interior lights include dome lights, red map
lights, and clear reading lights.
To replace the rear dome light (Fig. 4.9), do the following steps:
4.4
Controls
Clear Reading Lights, Optional
Clear reading lights are available as a option. They
are included only in the light assembly installed in
the overhead console, located next to the diffuse
dome light in the same fixture (Fig. 4.10). Like the
dome lights, the reading lights are door-activated.
1
2
Multifunction Turn Signal
Switch
3
10/17/2001
1. Overhead Console
2. Trimplate
f610587
3. Light Assembly
The multifunction turn signal switch is attached to the
steering column, just below the steering wheel, on
the left-hand side. This switch has the following
functions:
• The turn signals
Fig. 4.10, Overhead Console Dome Lights
1.
2.
• The windshield wipers and washers
Press in on the lens at the four mounting tabs
(arrows).
Replace the bullet-type bulb and install the lens
on the lamp base with the button at the bottom.
Overhead Console Dome/Reading Lights
• The headlight high beams
• The hazard warning flasher
See Fig. 4.11 for the multifunction switch and its
component parts.
To replace the overhead console dome/reading lights
(Fig. 4.10), do the following steps:
1.
Remove the tapping screws that attach the lamp
assembly and trimplate to the overhead console.
2.
Separate the lamp assembly from the trimplate
and disconnect the wiring harness.
3.
Replace the lamp assembly.
4.
Snap the lamp assembly and trimplate together.
5.
Connect the lamp assembly to the wiring harness.
6.
Insert the tabs on the trimplate into the slots on
the overhead console attachment plate.
7.
Center the lamp assembly in the headliner cutout
and install the center tapping screw.
8.
Install the remaining tapping screws.
Dome Light Switches
In the standard cab, there is one dome light switch in
the driver’s door that turns on the diffuse dome light
when the driver’s door is opened. In one option, two
switches are installed, so that the diffuse dome light
turns on when either the driver’s or passenger’s door
is opened.
4.5
4
5
1
2
3
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f820386
Press down on the upper part of the rocker to activate
the hazard warning flashers.
1. Washer Button
2. Wiper Control Dial
3. Turn Signal Lever
4. Hazard Flasher (red rocker switch)
5. Multifunction Switch Module
Fig. 4.11, Multifunction Turn Signal Switch
Turn-Signal Controls
The turn signal lever (Fig. 4.12) is mounted on the
steering column. Moving the lever down turns on the
Controls
left turn signal lights; moving it up turns on the right
turn signal lights.
2
3
1
4
5
f820383
10/29/2001
Rotate the control dial away from you to turn the wipers
on, or speed them up.
10/17/2001
f820384
Move the lever down to turn on the left turn signals.
Move the lever up to turn on the right turn signals.
Fig. 4.12, Turn Signal Controls
When one of the turn-signal lights is on, a green indicator arrow flashes at the far left or far right of the
warning and indicator light panel.
The lever automatically returns to the neutral position
(self-cancels the switch) when the steering wheel
returns to the straight ahead position after a turn. To
cancel the signal manually, move the lever to the
neutral position.
Windshield Wiper/Washer Controls
CAUTION
Rotate the control dial towards you to slow the wipers
down, or turn them off.
1. Washer Button
2. OFF Position
3. Delay Positions
4. Wipers On, Low Speed
5. Wipers On, High Speed
Fig. 4.13, Wiper/Washer Controls
the control dial clockwise as far as it will go (to the
OFF setting) turns the wipers off.
The washers are operated by a yellow button at the
very end of the turn signal lever. To operate the
washers, press the button in and hold it in until you
want the washers to stop.
Headlight High Beams
Do not move the wiper arms manually. Wiper
motor damage will occur if the arms are moved.
Push the turn signal lever forward, towards the windshield, to turn on the high-beam headlights. Pull the
turn signal lever back to its original position to turn
them off. See Fig. 4.14.
The wipers are operated by a rotary switch in the
wiper control dial, which is on the end of the turn signal lever. See Fig. 4.13. There are five delay settings, marked on the dial by lines of increasing
length, and two steady speed settings, LO and HI.
When the high beam headlights are on, a blue light
illuminates on the instrument cluster between the tachometer and speedometer. For vehicles built to operate in the United States, switching on the high
beams will switch off the road lights.
Rotating the control dial forward (in a counterclockwise direction) turns the wipers on. If they are already on, rotating the handle further forward (to a
faster speed setting) increases the speed of the wipers through the various delay settings, and to LO and
then HI.
NOTE: The ignition switch must be on for the
high beams to work.
With the headlight low beams on, pull the lever backward, towards the steering wheel, to flash the high
beams (turn them on momentarily).
Rotating the control dial in the opposite direction
(clockwise) causes the wipers to slow down. Rotating
4.6
Controls
The button for the electric horn is located in the center of the steering wheel. To sound the horn, press
down on the button. See Fig. 4.15.
1
2
1
10/17/2001
f820385
Move the lever away from you to turn on the high beams.
Move the lever back to its original position to turn them
off.
Move the lever towards you to flash the high beams
momentarily.
1. Turn Signal Lever
To sound the electric horn, press down on the horn
button.
1. Horn Button
Fig. 4.15, Electric Horn Control
2. Boot
Fig. 4.14, Headlight High Beams
The headlight low beams remain on continuously
during high beam operation. If the low beam headlights are turned off by use of the headlight switch,
the high beams turn off also.
f461918
10/17/2001
Air Horn, Optional
Single and dual air horns are available as options.
The air horn is controlled by a wire lanyard hanging
down just inboard on the driver’s door. See Fig. 4.16.
Pull downward on the lanyard to sound the air horn.
Hazard Warning Flasher
The hazard warning light flasher (Fig. 4.11) is a red
rocker switch located on the top of the multifunction
switch module. When the flashers are activated, all
of the turn signal lights (front, side, and rear) and the
two green indicator arrows on the control panel will
blink on and off.
To flash the hazard warning lights, press down on
the upper part of the rocker (towards the dash). To
stop the hazard warning lights, press down on the
lower part of the rocker (towards the steering wheel).
Horn Controls
NOTE: It is possible to have both the electric
and the air horn installed on one vehicle.
Electric Horn
A single electric horn is standard. Dual electric horns
are available as an option.
4.7
10/17/2001
f610592
To sound the air horn, pull down on the lanyard (arrow).
Fig. 4.16, Air Horn Control
Controls
Powertrain Controls
above the paddle and SET/CST below the
paddle.
After-Treatment System (ATS)
Request/Inhibit Regen Switch
A parked regen of the ATS can be initiated with the
request/inhibit regen switch. It may also be used to
inhibit the vehicle from performing an automatic
regen. See Fig. 4.17.
1
The style and function of switch will vary with the engine make and model. See the engine operation
manual for operation details.
2
09/13/2001
10/02/2006
f610848
Fig. 4.17, Request/Inhibit Regen Switch
Cruise Control Switches
CAUTION
Do not attempt to shift gears without using the
clutch pedal when the cruise control is engaged.
Failure to follow this precaution will result in a
temporarily uncontrolled increase in engine
speed; transmission damage and gear stripping
could result.
On standard models, cruise control is activated by
two dash switches. See Fig. 4.18. On some models,
cruise control can be activated by a button on the
transmission shift knob.
• The On/Off Switch—this two-position rocker
switch bears the legend SPD CNTL on the
lower half of the switch. When cruise control is
on, an amber light illuminates in the top part of
the switch.
• The Set/Resume Switch—this three-position
paddle switch bears the legend RES/ACC
f610510
To turn cruise control on, press the upper half of the On/
Off (rocker) switch. To turn cruise control off, press the
lower half of the On/Off (rocker) switch.
1. Cruise Control On/Off (rocker) Switch
2. Cruise Control Set/Resume (paddle) Switch
Fig. 4.18, Cruise Control Switches, Dash-Mounted
NOTE: For more information about cruise control operation, see Chapter 7.
Engine Brake Switch, Optional
The engine brake switch controls the degree of engine braking. Normally there are two paddle
switches, a two-position On/Off Switch to activate the
engine brake, and a two-position HI-LO Switch to
control the amount of engine braking.
To turn the two-position On/Off Switch on, raise the
paddle. When the two-position switch is on, an
amber LED (light-emitting diode) illuminates inside
the switch.
To turn the two-position HI-LO Switch on high, raise
the paddle (at the HI-LO icon). To turn the twoposition HI-LO Switch on low, lower the paddle (at
the ENG BRK legend). See Fig. 4.19.
A three-position switch is used on MBE900 engines
equipped with both the regular engine brake and the
constant-throttle (decompression) brake. It works the
4.8
Controls
1
2
f610588
10/17/2001
1. On/Off Switch
11/28/2001
2. HI-LO Switch
f610589
Fig. 4.20, Exhaust Brake Switch
Fig. 4.19, Engine Brake Switches
same as the two-position HI-LO switch, except that
there is a third (off) position when the switch is left at
its normal position.
The engine brake turns off automatically or when the
clutch pedal is pressed. On vehicles without a clutch
pedal, the brake pedal can be used to deactivate the
engine brake. For more information about engine
brake operation, see Chapter 7.
When the panel lights are on, the HI-LO icon is backlit in amber on the HI-LO switch. On both switches,
the ENG BRK legend is backlit in green when the
panel lights are on.
Exhaust Brake Switch, Optional
The optional exhaust brake is controlled by a dashmounted rocker switch to help slow the vehicle when
the accelerator is released. See Chapter 7 under the
heading "Exhaust Braking System, Optional" for additional information.
03/31/2009
f610589a
Fig. 4.21, Exhaust Brake Switch
To turn the engine fan on, press on the upper part of
the rocker (at the fan icon). See Fig. 4.22.
When the engine fan is running, the fan blade icon is
backlit in amber. When the panel lights are on, the
ENG FAN legend is backlit in green.
To turn the exhaust brake on, press on the upper
part of the rocker (at the light inside the switch). The
exhaust brake turns off automatically. See Fig. 4.20
or Fig. 4.21.
When the exhaust brake switch is on, an amber LED
illuminates inside the switch. When the panel lights
are on, the EXHST BRK legend is backlit in green.
Engine Fan Switch, Optional
The engine cooling fan can be turned on by the engine fan switch (ENG FAN legend). The fan will continue to operate for a set amount of time and then
turn off unless the coolant temperature is high
enough to continue the fan operation.
4.9
f610590
01/04/2011
Fig. 4.22, Engine Fan Switch
Controls
Transmission Controls
If so equipped, the transmission range control valve
and splitter valve are attached to the gearshift knob.
Transmission shift pattern labels are located inside
the cab. See Chapter 8 for complete transmission
operating instructions.
On vehicles with standard Allison On-Highway Series
automatic transmission, the shift selector is leveractivated. The display mounted on the steering column provides four forward ranges and one reverse
range. See Fig. 4.23.
f610638
01/22/2003
Fig. 4.24, Overdrive Lockout Switch
1
2
On vehicles with Allison MD Series automatic transmission or Eaton Autoshift automated transmission, a
push-button shift selector provides four, five, or six
forward ranges and one reverse range. See Chapter 8 for more information about the push-button shift
selector.
Axle Switches
3
All axle switches contain a red LED (light-emitting
diode) that illuminates the switch from within when
the switch is turned on (the upper part of the rocker
is pressed). The legend under the LED, if any, is not
visible until the switch is turned on.
IMPORTANT: A guard is positioned around all
axle switches to prevent unintentional activation.
01/22/2003
f270119
1. All Series, Standard (without park)
2. 1000/2400 Series, Optional (with park)
3. 2000 Series, Optional (with auto-apply parking
brake)
Fig. 4.23, Steering Column-Mounted Shift Controls
NOTE: For more information on axle switch
function, see Chapter 8.
Differential Lock Switch
CAUTION
When the transmission is in D (drive), the vehicle will
operate in the overdrive (5th) gear. To shift down into
the direct drive (4th) gear, use the overdrive lockout
switch (O/D legend). See Fig. 4.24. The transmission
will shift into 4th gear and remain in that gear unless
a range inhibitor is active, such as engine overspeed.
See Chapter 8 for more information about range
inhibitors.
Differential lock should only be engaged when
the vehicle is stopped or moving slowly at low
throttle. This will prevent internal axle damage.
To shift to fourth gear, press on the upper part of the
rocker (at the LED). The LED will come on and stay
illuminated until the bottom part of the rocker switch
is pressed.
To lock the wheels together, press the upper half of
the rocker momentarily (at the LED). To turn off differential lock, press the upper half of the rocker
again.
The differential lock switch is a two-position guarded
rocker switch. See Fig. 4.25. It causes the wheels on
each axle governed by the switch to rotate together.
It is also known as side-to-side wheel lock.
4.10
Controls
To lock the axles together, press the upper half of the
rocker momentarily (at the LED). To turn off interaxle
lock, press the upper half of the rocker again.
When the panel lights are on, the double-axle icon is
backlit in green.
10/26/2001
f610596
IMPORTANT: The interaxle lock rocker switch is
guarded to prevent unintentional switch activation. This switch does not have a diagnostic
blink function when inactive.
Axle Shift Switch
Fig. 4.25, Differential Lock Switch
When the panel lights are on, the double-axle icon is
backlit in green.
IMPORTANT: The differential lock switch is
guarded to prevent unintentional switch activation. If the LED in the switch begins to blink during normal operation, when the switch has not
been activated, this indicates an error condition.
Bring the vehicle to an authorized Freightliner
service facility as soon as possible.
CAUTION
To prevent transmission and axle damage, make
sure the automatic transmission is in high range
when performing an axle shift with the vehicle
moving.
The axle shift switch is a two-position guarded rocker
switch installed on vehicles with two-speed axles.
See Fig. 4.27.
Interaxle Lock Switch
CAUTION
The interaxle lock should not be engaged on a
vehicle with obviously spinning wheels. Engagement at high speed or power can damage the
axle(s).
The interaxle lock switch is a two-position guarded
rocker switch installed on vehicles with dual drive
axles. See Fig. 4.26. It causes both axle shafts to
rotate together.
10/26/2001
f610594
Fig. 4.27, Axle Shift Switch
To shift the axle from low speed to high speed, press
the upper half of the rocker momentarily (at the
LED). To turn the axle shift off (switch from high
speed back to low speed), press the upper half of
the rocker again.
NOTE: On vehicles with tandem drive axles,
there is an interlock that prevents a 2-speed
axle from shifting whenever the interaxle lock is
on.
10/26/2001
f610595
Fig. 4.26, Interaxle Lock Switch
4.11
When the panel lights are on, the AXLE SHIFT legend is backlit in green.
IMPORTANT: The axle shift switch is guarded to
prevent unintentional switch activation. If the
Controls
LED in the switch begins to blink during normal
operation, when the switch has not been activated, this indicates an error condition. Bring the
vehicle to an authorized Freightliner service facility as soon as possible.
All-Wheel-Drive Controls,
Optional
All-wheel-drive (AWD) allows the driver to direct
driveline power to all four axles, front and rear. Two
switches are used to control AWD: an AWD operation
switch used to activate all-wheel-drive, and an AWD
range switch used to select the high or low range.
AWD controls are not multiplexed.
AWD Operation Switch
The AWD operation switch is a two-position rocker
switch with a light-emitting diode (LED) that illuminates when AWD is engaged. The legend LOCKED
is underneath the LED on the upper half of the
switch. On the lower half is the legend AWD. See
Fig. 4.28. When the panel lights are on, the AWD
legend is backlit in green.
AWD Range Switch
CAUTION
To prevent damage to the transfer case and the
driveline, stop the vehicle and apply the parking
brake before using the range switch.
The AWD range switch is used under similar conditions to those of the axle shift switch on a two-speed
rear axle. Use the high range when driving at normal
speeds under off-road conditions, or on non-paved
surfaces. Use the low range when extra traction is
needed at lower speeds; for example, under conditions of mud, snow, or ice. This switch should be
used only when AWD has been engaged.
In most cases, the AWD range switch is a twoposition rocker switch with the legends LO RANGE
at the upper end and HIGH RANGE at the lower
end. On vehicles with a power take-off unit (PTO),
the three-position switch has a neutral (N-TRL) position in the middle. See Fig. 4.29. When the panel
lights are on, the HIGH RANGE legend is backlit in
green.
1
2
LO
RANGE
LO
N−TRL
HIGH
RANGE
HIGH
RANGE
LOCKED
AWD
08/10/2006
f610807
Fig. 4.28, AWD Operation Switch
To engage AWD, press the upper half of the rocker
switch. The LED illuminates to indicate that AWD is
engaged. To turn off AWD, press the lower half of the
switch. The LED goes out to indicate the AWD is no
longer engaged.
When AWD is engaged, the LOCKED legend is
backlit in red. In addition, a red indicator with the legend T-CASE ENGAGED displays on the dash message center.
07/21/2006
f610808
1. Two-Position Switch
2. Three-Position Switch
Fig. 4.29, AWD Range Switches
Two-Position Switch (no PTO)
On vehicles without a PTO, high range is considered
standard operation. To activate the low range, press
the upper half of the switch. When the low range is
activated, the LO RANGE legend is backlit in red. In
addition, a red indicator with the legend T-CASE LO
RNG displays on the dash message center. To
switch back to HIGH RANGE, press the lower half of
the switch.
4.12
Controls
Three-Position Switch (with PTO)
Trailer Air Supply Valve
IMPORTANT: Always use the N-TRL switch position when operating the PTO.
The red octagonal-shaped knob (Fig. 4.30) on the
auxiliary dash panel operates the trailer air supply
valve. After the vehicle and its air hoses are connected to a trailer, and the pressure in the air system
is at least 65 psi (448 kPa), the red knob must be
pushed in (and should stay in) to charge the trailer
air supply system and release the trailer spring parking brakes. Before disconnecting a trailer or when
operating a vehicle without a trailer, the red knob
must be pulled out.
On vehicles with a PTO, neutral is considered standard operation (switch in the middle position). An
amber indicator with the legend T-CASE NTRL displays on the dash message center.
To activate the high range, press the lower half of the
switch. No indicator displays on the dash message
center with the high range activated. Press the upper
half to return to N-TRL.
To activate the low range, press the upper half of the
switch. A red indicator with the legend T-CASE LO
RNG displays on the dash message center. On the
switch, the LO N-TRL legend is backlit in red. Press
the lower half to return to N-TRL, and then press the
lower half again to select HIGH RANGE.
Braking
Parking Brake Control Valve
See Chapter 9 under the heading "Dual Air Brake
System" for further information about the trailer air
supply valve.
Trailer Brake Lever
The trailer brake lever (hand control valve) is used
for applying the trailer brakes without applying the
truck or tractor brakes. It is usually mounted on the
right-hand control panel. See Fig. 4.31. See Chapter 9 under the heading "Dual Air Brake System" for
operating instructions.
The yellow diamond-shaped knob (Fig. 4.30) on the
auxiliary dash panel operates the parking brake control valve (park brake switch). Pulling the yellow knob
applies the tractor parking brakes (spring brakes).
Pushing in the knob releases the tractor parking
brakes. Before the parking brakes can be released,
the air pressure in either air brake system must be at
least 65 psi (448 kPa).
1
2
f610591
10/17/2001
Fig. 4.31, Trailer Brake Lever
f610291
03/10/99
1. Trailer Air Supply Valve (red knob)
2. Parking Brake Control Valve (yellow knob)
Fig. 4.30, Brake Valve Control Knobs
See Chapter 9 under the heading "Dual Air Brake
System" for further information about the parking
brake control valve.
4.13
Meritor™ WABCO® Antilock Braking
System (ABS)
The Meritor WABCO Antilock Braking System (ABS)
has an amber tractor indicator light (TRACTOR ABS
legend) and, if equipped with automatic traction control (ATC), an amber wheel spin indicator light
(WHEEL SPIN legend). See Fig. 4.32.
Controls
On vehicles equipped with a compatible trailer, there
is also an amber trailer indicator light (TRAILER ABS
legend).
5
1
See the brake system operating instructions in Chapter 9 for more information about ABS.
2
1
3
2
3
10/12/2000
4
f610454
1. Tractor ABS Indicator
2. Wheel Spin Indicator
(optional)
3. Trailer ABS Indicator
Fig. 4.32, ABS Indicator Lights
Adjustable Steering Column
To tilt the steering column, press down on the foot
pedal located below the steering column. Tilt the
steering column up or down to the desired position.
Release the foot pedal to lock the steering column in
place. See Fig. 4.33.
To telescope the steering column, press down on the
foot pedal located below the steering column. Pull
the steering wheel closer to you or push the steering
wheel farther away from you. Release the foot pedal
to lock the steering column in place.
Other Dash-Mounted Controls
Windshield-Fan Switches, Optional
Ceiling-mounted defogger fans are operated by
LOW/OFF/HIGH toggle switches located in the base
of the fan.
07/19/2006
1. Multifunction Turn
Signal Switch
2. Headlight Switch
3. Ignition Switch
f610799
4. Adjustable Steering
Column foot Pedal
5. Steering Wheel
Fig. 4.33, Adjustable Steering Column
Cigarette Lighter
Push in the lighter to heat the element. The lighter
will stay in and will automatically pop out when the
element is hot.
CB Radio Connections
An antenna connection and positive (+) and negative
(–) power connections are provided for a CB radio.
4.14
Controls
Suspension Dump Switch
NOTICE
Do not operate the vehicle over uneven ground
such as ramps, speed bumps, curbs, etc. with
the air springs deflated. Doing this may lead to
air bag separation from the piston, preventing the
suspension air springs from reinflating.
NOTICE
Never exhaust air from the suspension while
driving. When the air is exhausted, the suspension will not absorb road shocks, and components may be damaged.
The suspension dump switch is a two-position
guarded rocker switch (Fig. 4.34). It allows the air in
the vehicle air suspension to be quickly exhausted,
lowering the rear of the vehicle. This makes it easier
to connect to, or disconnect from, a trailer.
Normal Response: The LED in the switch blinks
while the suspension is deflating or filling. When it is
completely deflated, the LED comes on steady and
stays illuminated. In normal operation, the suspension may dump or fill so quickly that the blinking of
the switch is barely noticeable.
If operation of the switch is not possible for any reason (vehicle is moving faster than 5 mph, ignition is
turned off, etc.), the LED will stop blinking and turn
off.
Slow Response: If operation of the switch is slowed
for any reason (by cold weather, low air pressure,
etc.), the switch will continue to blink until the suspension completes a dump or fill. As in the normal
response, the LED comes on steady and stays illuminated when the suspension if fully deflated.
Abnormal Response: If the LED blinks for more than
10 seconds, the suspension dump mechanism may
not be operating properly. Bring the vehicle to an authorized Freightliner service facility for testing.
If the ignition is turned off while the vehicle is in
dump mode, the power to the dump solenoid is cut
off to prevent battery drain, and the suspension system will autofill the rear air springs. The suspension
will also autofill if the vehicle is operated with the
suspension dumped, and the speed is over 5 mph
(e.g. -- driver forgot to inflate the bags or there was a
system failure).
Suspension Autofill Override Valve
10/26/2001
f610597
Fig. 4.34, Suspension Dump Switch
To lower the rear of the vehicle quickly, press the
upper half of the rocker momentarily (at the LED). To
raise the suspension to its normal height, press the
upper half of the rocker again.
When the panel lights are on, the tractor icon is
backlit in green.
IMPORTANT: The suspension dump switch is
guarded to prevent unintentional switch activation. This switch does not have a diagnostic
blink function when inactive.
When the suspension dump switch is pressed, three
responses are possible: a normal response, a slow
response, and an abnormal response.
4.15
The suspension autofill override option is a dash air
valve, that keeps the suspension deflated when the
ignition is turned off. To operate it, turn off the ignition
then push the override valve knob. See Fig. 4.35.
When the ignition is turned on, the override valve will
release automatically, and the suspension will autofill.
The suspension dump switch will then operate normally as described previously.
Heater/Air Conditioner Control
Panel
Standard controls (Fig. 4.36) for the heating, ventilation, and air-conditioning system (HVAC) consist of
an eight-speed fan switch, an air selection switch,
and a temperature control switch. On vehicles with
air conditioning, the panel also contains a telltale
LED and an air recirculation button. See Chapter 6
for detailed operating instructions for the HVAC.
Controls
1
SH TO
PU
2
09/11/2007
f321102
Fig. 4.35, Suspension Autofill Override Valve
1
2
3
0
f910481
1. Three-Person Seat
2. Seat Slide Lever
Fig. 4.37, Full Bench Seat
adjustment so that the seat back contacts the backwall. It is the responsibility of the driver to adjust the
seat to prevent damage to the seat and the cab interior.
2
1
10/05/2001
3
4
All adjustment controls for a suspension seat are located on the seat base. See Chapter 5 for complete
instructions.
10/03/2001
f831452
1. Fan Switch
2. Air Selection Switch
3. Temperature Control Switch
Fig. 4.36, HVAC Climate Control Panel, Standard
Seat Controls
Bench Seat Adjustment Controls
The standard bench seat has one control: the seat
slide lever. See Fig. 4.37. The two-person bench
seat and the non-suspended passenger seat have
no controls.
Suspension Seat Adjustment Controls
All controls for adjusting air suspension seats are
located within easy reach of the occupant.
Due to the maximum adjustability of mid- and highback air suspension seats, it is possible to combine
the seat back recline adjustment and the seat slide
4.16
5
Cab Features
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2
Seat Belts and Tether Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.7
Air Bag, Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.9
Cab Amenities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10
Windshield Washer Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.11
Cab Features
Windows
Mirrors
Standard windows operate mechanically using a
hand crank.
The standard outside mirrors are mounted on the
door frame. There is a primary rear view mirror and a
convex mirror.
Power windows are optional, and can be installed on
one side or both sides. One power window switch
(window icon) will be installed on the dash for each
window. See Fig. 5.1. If your vehicle is equipped with
power windows, press up to raise the window; press
down to lower the window. Releasing the switch
causes the window to stop.
Mirror Heat Switch, Optional
One or both outside door mirrors can be heated to
keep them clear of fog, frost, and ice.
To heat the mirrors, press the upper part of the mirror heat switch (MIRR HEAT) on the dash. See
Fig. 5.3. When the mirror heat switch is on, an
amber indicator light illuminates inside the switch.
MIRR
HEAT
10/09/2001
f610522
Press up to raise the window; press down to lower the
window. Releasing the switch causes the window to stop.
Fig. 5.1, Power Window Switch
Standard vent (wing) windows do not open. Operating vent windows are optional. To open the operating
vent window, turn the latch on the window and push
the window open. See Fig. 5.2.
10/09/2001
f610524
To heat the mirrors, press up; press down to turn off the
heat.
Fig. 5.3, Mirror Heat Switch
The mirror heat switch is a smart switch (fully multiplexed).
Power Mirrors, Optional
The main outside mirrors, if heated, can be equipped
with an electrical remote control located on the driver’s door. See Fig. 5.4.
To select the mirrors on the left-hand side, press the
left side of the mirror select switch. To select the mirrors on the right-hand side, press the right side of the
mirror select switch.
1
The keypad has four arrow keys, pointing up, down,
left, and right. To adjust the mirror position, press the
keypad in the direction you want the mirror to move.
2
f670096
10/05/2001
1. Latch
2. Vent Window
Fig. 5.2, Operating Vent Window (optional)
5.1
Down View Mirror, Optional
A down view mirror can be installed on the top of the
passenger door frame to allow the driver a view of
Cab Features
Unless otherwise noted, all seat adjustments should
be made while seated and before the engine is
started.
2
Due to the high degree of adjustability found in highback air suspension seats, it is possible to set the
seat back recline adjustment and the seat slide adjustment in such a combination that the seat back
will come into contact with the rear wall of the cab. It
is the responsibility of the driver to adjust the seat to
prevent damage to the seat and the cab interior.
1
10/05/2001
f610523
To adjust the mirror position, press the keypad on the
door in the direction you want the mirror to move.
1. Mirror Select Switch
The following is a description of adjustments that are
available on one or more seats. Not all seats have all
of the adjustments listed below.
1.
2. Keypad
Fig. 5.4, Power Mirror Switch Pad
Seat Slide (fore-and-aft): When this adjustment is
made, the entire seat moves forward or backward on its track (Fig. 5.6).
the area adjacent to the right side of the cab. See
Fig. 5.5.
B
A
1
f720396
10/05/2001
10/05/2001
f910482
A. Seat Slide (fore-and-aft) Adjustment
B. Isolator Feature
1. Mirror
Fig. 5.5, Down View Mirror (optional)
Seats
Fig. 5.6, Seat Slide Adjustment and Isolator Feature
2.
Isolator: This feature (also referred to as backslap isolator or Chugger-Snubber®) reduces the
amount of road shock by isolating the occupant
from the motion of the vehicle, and allowing the
upper seat to move in a simple pendulum motion. Whenever the isolator is not desired, it can
be locked out (Fig. 5.6).
3.
Lumbar Support: Lumbar support changes the
shape of the seat back to give more or less support to the occupant’s lumbar (lower back) area.
General Information
WARNING
Keep hands, tools, and other objects away from
the scissor points under the seats. Failure to do
so could cause personal injury.
5.2
Cab Features
This adjustment is either mechanical or air controlled, depending on make and model of the
seat (Fig. 5.7).
B
A
B
A
10/05/2001
f910484
A. Backrest Tilt
B. Seat Cushion Tilt
Fig. 5.8, Cushion Tilt Adjustments
10/05/2001
A. Lumbar Support
f910483
B. Headrest Adjustment
Fig. 5.7, Lumbar Support and Headrest Adjustment
4.
Headrest: When this adjustment is made, the
upper part of the backrest (back cushion)
changes angle to provide head and upper back
support (Fig. 5.7).
5.
Backrest Tilt: This adjustment pivots the backrest
forward or backward (Fig. 5.8).
6.
Seat Cushion Tilt: This adjustment raises or lowers the front and/or back of the seat (bottom)
cushion. This adjustment is easier to perform
when all weight is removed from the seat
(Fig. 5.8).
7.
Seat Tilt: When this adjustment is made, the seat
assembly, both backrest and seat cushion, tilts
forward or backward (Fig. 5.8).
8.
9.
5.3
A
10/05/2001
Ride Height Adjustment: The entire seat moves
up or down when adjusting the ride height. The
adjustment is either manual or air controlled, depending on the make and model of the seat
(Fig. 5.9).
Damper: When you sit on the seat, a leveling
valve places you in the center of the ride zone.
When the damper is adjusted properly under nor-
f910485
A. Ride Height
Fig. 5.9, Ride Height Adjustment
mal driving conditions, the seat should not top or
bottom against the limits of the vertical travel.
10. Ride Firmness: A firmer ride gives a better feel
for the road but less protection against unevenness in the road surface. A softer ride smooths
out the bumps.
Cab Features
Bench Seats
The three-person full bench seat is standard. See
Fig. 5.10.
1
1
7
6
4
5
10/10/96
2
10/05/2001
f910481
1. Three-Person Seat
2. Seat Slide Lever
Fig. 5.10, Full Bench Seat
The full bench seat has a seat slide adjustment to
allow more or less leg room for the driver and passengers. Release the seat slide lever and push backwards or forwards to move the seat along its track.
High-back air suspension seats are optional for both
driver’s and passenger’s seats. Also available are a
non-suspended passenger’s seat, and a two-person
bench seat with a safe or tool box located under the
seat.
No adjustments are possible on the two-person
bench seat or the non-suspended passenger seat.
Bostrom Seat
Seat Slide Adjustment
Move the seat slide and isolator lever (Fig. 5.11) to
the left and hold it there to slide the seat forward or
backward to the desired position.
Isolator
To engage the isolator, put the seat slide and isolator
lever in the center position. Lock out the isolator by
moving the lever to the right.
1.
2.
3.
4.
5.
6.
7.
2
3
f910131
Backrest Tilt Lever
Air Lumbar Support Control Valve (optional)
Damper Adjustment Switch
Height Adjustment Switch
Seat Cushion Tilt Knob
Seat Slide and Isolator Lever
Lumbar Support Knob (standard)
Fig. 5.11, Bostrom Seat
Lumbar Support
To increase lumbar support, rotate the lumbar support knob forward. To decrease lumbar support, rotate the knob rearward.
On seats equipped with air lumbar support, press the
control valve upward to increase lumbar support.
Press the control valve downward to decrease lumbar support.
Seat Cushion Tilt
Rotate the seat cushion tilt knob to increase or decrease seat cushion tilt.
Backrest Tilt
To tilt the backrest, lean forward slightly to remove
pressure from the cushion and hold the backrest tilt
lever rearward. Lean backward slowly to the desired
position and release the lever to lock the backrest in
place.
5.4
Cab Features
Ride Height and Damper Adjustment
Lumbar Support
To raise the seat, press the upper portion of the
height adjustment switch. To lower the seat, press
the lower portion of the switch.
To adjust the lumbar support, use the lumbar support
switch on the side of the seat to give more or less
support to your lower back.
Press the damper adjustment switch to adjust the
damper.
Backrest Tilt
National 2000 Series Seat
To tilt the backrest, turn the backrest tilt knob until
the desired position is reached.
Seat Slide Adjustment
Seat Cushion Adjustment
Move the seat slide lever (Fig. 5.12) to the left and
hold it there to slide the seat forward or backward to
the desired position. Move the lever back to its original position to lock the seat in place.
To adjust the height of the front of the seat cushion,
lift the front cushion height adjustment handle, and
pull forward or push back to the desired setting.
To adjust the height of the rear of the seat cushion,
remove your weight from the seat and turn the rear
cushion adjustment knob to one of three positions.
Ride Height Adjustment
To raise or lower the height of the seat, use the
height adjustment switch on the side of the seat.
7
Sears Seat
Seat Slide Adjustment
6
1
5
4
2
3
4
f910445
11/14/2000
1.
2.
3.
4.
5.
6.
7.
3
Push the seat slide (fore-and-aft adjustment) lever
(Fig. 5.13) all the way to the left and slide the seat
forward or backward, as desired. Release the lever
to lock the seat in the desired position.
5
Backrest Tilt Knob
Lumbar Support Switch
Height Adjustment Switch
Seat Slide Lever
Front Cushion Height Adjustment Handle
Isolator Handle
Rear Cushion Adjustment Knob
2
1
Fig. 5.12, National 2000 Series Seat
10/08/2001
Isolator
To use the isolator feature, turn the isolator handle to
the horizontal position. Turn the isolator handle down
to lock out the isolator.
1.
2.
3.
4.
5.
f910487
Seat Slide Lever
Seat Cushion Tilt Adjustment
Ride Height Knob
Lumbar Support Lever
Backrest Lever
Fig. 5.13, Sears Low Profile Seat
5.5
Cab Features
Isolator
To engage the isolator (if installed), move the seat
slide and isolator lever (Fig. 5.14) all the way to the
right. To lock out the isolator, move the isolator lever
to the center position.
1
10/08/2001
1
2
f910488
1. Ride Height Switch
2. Air Lumbar Support Switch
Fig. 5.15, Air Controls, Sears Seat
2
4
Seat Cushion Tilt
5
3
8
6
Backrest Adjustment
7
10/09/2001
To raise the seat cushion, lift upward on the front of
the seat cushion, and then push it rearwards. To
lower the seat cushion, pull forward on the front of
the seat cushion, and then push downwards.
f910486
NOTE: Armrests are optional.
1. Lumbar Support Lever
2. Backrest Lever
3. Ride Height Knob
4. Shock Absorber Bracket (ride firmness)
5. Pin (ride firmness)
6. Snap Ring (ride firmness)
7. Seat Slide and Isolator Lever
8. Seat Cushion Adjustment
Fig. 5.14, Sears Fleetmaster Seat (with isolator)
Lumbar Support
Move the three-position lumbar support lever upward
to increase lumbar support (firmer). Move the lever
downward to decrease lumbar support (less firm).
NOTE: This three-position lever (see inset) does
not rotate a full 360 degrees.
For seats with air support, use the aft rocker switch
on the control panel on the left-hand side of the seat
(Fig. 5.15). Press up to make the seat firmer; press
down to make the seat less firm.
To adjust the backrest, push downwards on the backrest lever just below the bottom of the backrest cushion. With the lever down, lean forward or backward
to the desired position. Release the lever to lock the
backrest in place.
Ride Height Adjustment
Push the ride height knob inwards to inflate the air
cylinder, raising the height of the seat. Pull the ride
height knob outwards to deflate the air cylinder, lowering the height of the seat.
For seats with air support, use the forward rocker
switch on the control panel on the left-hand side of
the seat (Fig. 5.15). Press up to raise the seat; press
down to lower the seat.
Ride Firmness Adjustment
For a softer ride, remove the snap ring and pin from
the shock absorber bracket (see inset). Relocate the
pin in the other set of holes in the bracket and secure it with the snap ring.
5.6
Cab Features
Seat Belts and Tether Belts
Seat Belt Inspection
General Information
Seat belt assemblies are designed to secure persons
in the vehicle to help reduce the chance of injury or
the amount of injury resulting from accidents or sudden stops. For this reason, Daimler Trucks North
America LLC urges that the driver and all passengers, regardless of age or physical condition, use
seat belts when riding in the vehicle.
WARNING
Always use the vehicle’s seat belt system when
operating the vehicle. Failure to do so can result
in severe personal injury or death.
Seat belt assemblies in Daimler Trucks North
America (DTNA) vehicles meet Federal Motor Vehicle Safety Standard 209, "Type 1" and "Type 2" requirements.
When transporting a child, always use a child restraint system or the vehicle seat belts as appropriate. To determine whether a child restraint system is
required, review and comply with applicable state
and local laws. Any child restraint used must comply
with Federal Motor Vehicle Safety Standard 213,
"Child Restraint Systems." When providing a child
restraint system, always carefully read and follow all
instructions pertaining to installation and usage for
the child. Make certain the child remains in the restraint system at all times when the vehicle is in motion.
In addition to seat belt assemblies, tether belts are
installed on suspension-type seats. Tether belts help
secure the seat to the floor and are intended to restrain the seat and seat belt in case of an accident or
sudden stop.
IMPORTANT: Seat belts have a finite life which
may be much shorter than the life of the vehicle.
Regular inspections and replacement as needed
are the only assurance of adequate seat belt
security over the life of the vehicle.
WARNING
Inspect and maintain seat belts and tethers as
instructed below. Seat belts and tethers that were
damaged or stressed in an accident must be replaced, and their anchoring points must be
checked. When any part of a seat belt system
needs replacement, the entire seat belt must be
replaced, both the retractor and the buckle side.
Do not attempt to modify the seat belt system;
doing so could change the effectiveness of the
system. Failure to replace damaged or stressed
seat belts or any modifications to the system
may result in personal injury or death.
Inspect the seat belts and tether belts (if so
equipped).
1.
Check the web for fraying, cuts, or extreme wear,
especially near the buckle latch plate and in the
D-loop guide area.
2.
Check the web for extreme dirt or dust, and for
severe fading from exposure to sunlight.
3.
Check the buckle and latch for operation and for
wear or damage.
4.
Check the Komfort Latch or the Sliding Komfort
Latch (if equipped) for function and cracks or
other damage.
5.
Check web retractor for function and damage.
6.
Check the mounting bolts for tightness and
tighten any that are loose.
Seat Belt Operation
Three-Point Seat Belt With Komfort Latch
or Sliding Komfort Latch
WARNING
Wear three-point seat belts only as described
below. Three-point seat belts are designed to be
worn by one person at a time. In case of an accident or sudden stop, personal injury or death
could result from misuse.
Fasten the seat belts before driving. Fastening a
three-point seat belt while driving creates a hazard.
5.7
Cab Features
When engaged and used properly, the Komfort Latch
(Fig. 5.16) and the Sliding Komfort Latch (Fig. 5.17)
introduce a small amount of slack into the seat belt,
resulting in a more comfortable ride.
1.
Slowly pull the latch end of the three-point seat
belt out of the retractor and pull it across your
lap (from outboard to inboard) far enough to engage the buckle. If the retractor locks too soon,
allow the belt to retract slightly, then slowly pull it
out again.
2.
Fasten the three-point seat belt by pushing the
latch into the buckle. Listen for an audible click.
See Fig. 5.18.
B
A
03/11/2010
f910620
A. Disengaged
B. Engaged
11/18/2010
Fig. 5.18, Fastening the Three-Point Belt
f910621a
Fig. 5.17, Sliding Komfort Latch
f910004a
01/18/95
Fig. 5.16, Komfort Latch
3.
Tug on the seat belt to make sure it is securely
fastened. If the buckle unlatches, repeat this
step. If the problem continues, replace the threepoint seat belt.
4.
Snug the seat belt to your waist.
5.
Position the shoulder strap diagonally across
your chest with the adjustable D-loop bracket (if
equipped). If desired, engage the Komfort Latch
or Sliding Komfort Latch as follows.
If equipped with a Sliding Komfort Latch, make
sure that the shoulder strap is snug against your
chest. Without loosening the shoulder strap,
push the Sliding Komfort Latch switch to the
"ON" position. See Fig. 5.17. To activate the
latch lean forward until you hear a click. This will
allow for approximately 1 inch (2.5 cm) of slack
between your chest and the shoulder harness.
Once engaged, the latch will allow you to lean
forward about 5 inches (13 cm) without having to
reset the latch. Leaning forward more than 5
5.8
Cab Features
inches (13 cm) will disengage the Sliding Komfort Latch, requiring it to be reset.
If equipped with a Komfort Latch, pull on the
shoulder strap to lessen the pressure of the strap
on your shoulder and chest. Allow no more than
1 inch (2.5 cm) of slack between your chest and
the shoulder harness. More slack can significantly reduce the seat belt effectiveness in an
accident or a sudden stop. While holding the belt
slack, press the Komfort Latch lever up, clamping the seat belt webbing (Fig. 5.19 and
Fig. 5.20).
A
If equipped with a Sliding Komfort Latch, unbuckle the seat belt, then tug on the shoulder
belt to release the Sliding Komfort Latch, or
press the Sliding Komfort latch to the "OFF" position, then unbuckle the seat belt.
If equipped with a Komfort Latch, unbuckle the
seat belt, then release the Komfort Latch by giving the shoulder belt a quick tug. If you lean forward against the shoulder belt, the Komfort Latch
will automatically release, and will need to be
reset.
NOTE: Neither the Komfort Latch nor the Sliding
Komfort Latch need to be manually released in
an emergency situation. Each will release by
itself under rough road or other abnormal conditions. Make sure the three-point seat belt is
completely retracted when it is not in use.
Air Bag, Optional
Your vehicle may or may not be equipped with a
driver’s air bag supplemental restraint system.
f910048a
01/06/95
A. 1 Inch (2.5 cm) Maximum
Fig. 5.19, Adjusting Shoulder Harness Clearance,
Komfort Latch
The air bag, when used with seat belts, provides additional protection to the driver in severe frontal collisions. The operational readiness of the air bag system is indicated by the supplemental restraint system
(SRS) indicator on the dash. The SRS indicator
comes on when the engine is started and then goes
off. The indicator will remain on if there is a problem
with the air bag system. The vehicle should be serviced if the SRS indicator does not come on when
the engine is started or if the SRS indicator remains
on.
WARNING
11/02/95
f910144
Fig. 5.20, Locking the Komfort Latch
6.
5.9
Unbuckle the three-point seat belt and release
the Komfort Latch or the Sliding Komfort Latch
as follows.
Air bags are designed to inflate only in severe
frontal collisions. The driver and the passenger
should always wear seat belts. For maximum protection in a collision or rollover, always be in a
normal seated position with your back against
the seat back and your head upright. Fasten your
seat belt and ensure that it is properly positioned
on your body as described under the "Seat Belt
Operation" heading. Since the air bag inflates
with considerable speed and force, a proper seat
position will keep you a safe distance from the
inflating air bag.
Cab Features
Do not place objects on the steering wheel or between you and the steering wheel. Keep your
hands on the sides and lower portion of the
steering wheel. Any objects may cause harm during an accident.
• Keep all liquids, acids, halogens, heavy
Failure to follow these instructions may result in
death or personal injury.
• Do not expose the air bag module to elec-
Air Bag Safety Guidelines
• Do not attempt to adapt, reuse, or install an
The air bag system contains components that use
combustible chemicals. Because these chemicals are
combustible, care must be taken when replacing or
handling system components.
WARNING
Consider undeployed air bags to be dangerous
and capable of deploying at any time. Do not attempt to service the air bag system unless
trained to do so. Damaged air bag systems
should be examined by qualified personnel before any attempt is made to remove or to deploy
the air bag. All intentional deployments and testing of the system should be performed by trained
personnel. Unintentional or improper air bag deployment could cause severe bodily injury or
death.
metals, and heavy salts away from the air
bag system.
• Do not cut, drill, braze, solder, weld, strike,
or probe any part of the air bag system.
tricity. Never probe a circuit.
air bag system in any vehicle other than the
specific vehicle for which it is designed.
• Do not cut wires or tamper with the connec-
tor between the vehicle wiring harness and
the air bag module. Cutting or removing the
connector from the system will disable the
safety shunt and could cause unintentional
deployment.
• Allow deployed air bag systems to cool
after deployment.
• Wear rubber gloves and safety glasses
when handling a deployed air bag.
• Wash your hands and exposed skin surface
areas immediately after handling a deployed system.
• Store, transport, dispose of, and recycle
deployed air bag system components in
accordance with all applicable federal,
state, and local regulations.
Do not attempt to disassemble the air bag inflator
unit or breach the integrity of the sealed metallic
inflator case. Doing so could cause severe bodily
injury or death.
• The air bag module may contain perchlor-
Do not allow system chemicals to contact other
liquids, combustibles, and flammable materials.
Doing so could cause chemical burns or personal injury.
• Keep all heavy objects in the cab secured.
The surface of the deployed air bag may contain
small amounts of sodium hydroxide (which is a
by-product of the gas generant combustion) and
metallic sodium. Sodium hydroxide may be irritating to the skin and eyes. Always wear rubber
gloves and safety glasses when handling a deployed air bag. Immediately wash your hands and
exposed skin areas with a mild soap and water.
Flush your eyes immediately if exposed to sodium hydroxide.
Review and comply with the following list of
warnings. Failure to do so could result in severe
injury or death.
ate material: special handling may apply,
see www.dtsc.ca.gov/hazardouswaste/
perchlorate.
Cab Amenities
Cup Holders
There are two cup holders molded into the lower part
of the auxiliary dash panel, one on either side of the
HVAC control head.
Cab Storage
There are storage bins in the dash and the overhead
console. On vehicles with optional individual driver’s
and passenger seats, there is a center storage console between the seats.
5.10
Cab Features
1
2
3
f680027
10/08/2001
1. Overhead Storage Bin
2. Overhead Console
3. Map Holder Netting
Fig. 5.21, Overhead Storage
There is a dash storage bin located under the cup
holders on the center panel. The bin has a hinged
cover and can be used to store sunglasses. There is
also a small storage pocket above the radio.
1
Overhead Storage
Vehicles without an overhead console have two storage bins located above the windshield.
2
On vehicles equipped with an overhead console,
most vehicles have a storage bin located in the overhead console. See Fig. 5.21. The overhead storage
bin is often removed and replaced with a CB radio.
3
4
Two map holders with netted openings are located
overhead, one on either side of the overhead console.
Center Storage Console (optional)
On vehicles with individual driver’s and passenger’s
seats, a center storage console can be installed between the seats.
The center storage console has a table top that can
be lifted up to deploy a writing surface. See
Fig. 5.22.
In another version, the center storage console has a
printer top with a paper slot in it. See Fig. 5.23.
Windshield Washer Reservoir
The standard location for the windshield washer reservoir is on the right-hand side of the cab underneath
5.11
10/08/2001
1.
2.
3.
4.
f680026
Table Top
Storage Console Cover
Storage Area
Storage Console Base
Fig. 5.22, Center Storage Console (with writing surface)
the door, just above the trailing edge of the top cab
step. See Fig. 5.24.
Cab Features
1
2
3
f680025
10/08/2001
1. Printer Top
2. Printer/Paper Area
3. Storage Console Base
Fig. 5.23, Center Storage Console (printer option)
3
1
2
10/08/2001
f820378a
1. Cab
2. Washer Reservoir Fill Cap
3. Top Step
Fig. 5.24, Windshield Washer Reservoir
5.12
6
Heater, Ventilator and Air
Conditioner
Climate Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1
Heater, Ventilator and Air Conditioner
Climate Control Panel
The climate control panel allows you to control the
heating, ventilating, defrosting, and air conditioning
functions. The climate control panel without air conditioning is shown in Fig. 6.1. The climate control
panel with air conditioning is shown in Fig. 6.2.
Fan Switch
The fan switch controls the fan speed and forces
fresh or recirculated air through the air outlets. The
fan switch has eight fan speeds and an off position.
To increase airflow, turn the fan switch to the right or
to a higher number. To decrease the airflow, turn the
switch to the left or to a lower number.
Air Selection Switch
The air selection switch allows you to control the flow
of air through the face outlets, the floor outlets, the
defrost (windshield) outlets, or a combination of
these outlets to give you nine air selection modes on
a system without air conditioning. See Fig. 6.3. A
system with air conditioning has 11 air selection
1
2
3
2
1
3
0
4
06/17/2003
f831452a
1. Fan Switch
2. Air Selection Switch
3. Temperature Control Switch
Fig. 6.1, Climate Control Panel Without Air Conditioning
2
1
3
2
3
1
0
06/18/2003
1. Fan Switch
2. Air Selection Switch
4
5
4
3. Temperature Control Switch
4. Recirculation Button
f831453a
5. Recirculation Indicator
Fig. 6.2, Climate Control Panel With Air Conditioning
6.1
Heater, Ventilator and Air Conditioner
modes, four of which are air conditioning modes. See
Fig. 6.4.
6
5
4
3
7
4
5
2
6
8
3
9
2
10
A
1
7
1
8
06/18/2003
9
06/17/2003
f831455
1.
2.
3.
4.
5.
6.
Face Mode
Selection Between Face Mode and Bi-Level Mode
Bi-Level Mode
Selection Between Bi-Level Mode and Floor Mode
Floor Mode
Selection Between Floor Mode and Floor/Defrost
Mode
7. Floor/Defrost Mode
8. Selection Between Floor/Defrost Mode and Defrost
Mode
9. Defrost Mode
Fig. 6.3, Air Selection Switch Without Air Conditioning
2.
3.
4.
Face Mode: Directs all airflow through the face
or instrument panel outlets.
f831462
A. Air Conditioning Modes
1. Air Conditioning Face Mode
2. Selection Between Air Conditioning Face Mode and
Air Conditioning Bi-Level Mode
3. Air Conditioning Bi-Level Mode
4. Selection Between Air Conditioning Bi-Level Mode
and Face Mode
5. Face Mode
6. Selection Between Face Mode and Floor Mode
7. Floor Mode
8. Selection between Floor Mode and Floor/Defrost
Mode
9. Floor/Defrost Mode
10. Selection between Floor/Defrost Mode and Defrost
Mode
11. Defrost Mode
Fig. 6.4, Air Selection Switch With Air Conditioning
Air Selection Switch Without Air
Conditioning
1.
11
through the floor outlets and 25 percent through
the defrost outlets.
7.
Floor/Defrost Mode: Directs the airflow equally
to the floor outlets and the defrost outlets.
8.
Bi-Level Mode: Directs the airflow equally to the
face outlets and the floor outlets.
Selection between Floor/Defrost Mode and
Defrost Mode: Directs 75 percent of the airflow
through the defrost outlets and 25 percent
through the floor outlets.
9.
Selection between Bi-Level Mode and Floor
Mode: Directs 25 percent of the airflow through
the face outlets and 75 percent through the floor
outlets.
Defrost Mode: Directs all airflow through the
defrost outlets.
Air Selection Switch With Air
Conditioning
Selection between Face Mode and Bi-Level
Mode: Directs 75 percent of the airflow through
the face outlets and 25 percent through the floor
outlets.
5.
Floor Mode: Directs all airflow through the floor
outlets.
1.
Air Conditioning Face Mode: Directs all airflow
through the face or instrument panel outlets.
6.
Selection between Floor Mode and Floor/
Defrost Mode: Directs 75 percent of the airflow
2.
Selection between the Air Conditioning Face
Mode and the Air Conditioning Bi-Level
6.2
Heater, Ventilator and Air Conditioner
Mode: Directs 75 percent of the airflow to the
face outlets and 25 percent to the floor outlets.
3.
Air Conditioning Bi-Level Mode: Directs the
airflow equally to the face outlets and the floor
outlets.
4.
Selection between the Air Conditioning BiLevel Mode and the Face Mode: Directs 25
percent of the airflow to the face outlets and 75
percent to the floor outlets.
5.
Face Mode: Directs all airflow through the face
outlets.
6.
Selection between Face Mode and Floor
Mode: Directs the airflow equally through the
face outlets and the floor outlets.
7.
8.
9.
The recirculation mode is only available on vehicles
with air conditioning.
The recirculation mode limits the amount of outside
air entering the cab. Press the recirculation button to
prevent dusty or smoky air from entering the cab.
The recirculation mode can also be used to decrease
the time required to cool or heat the cab interior during extreme outside temperature conditions. When
the recirculation mode is on, the recirculation indicator will be on. See Fig. 6.2.
The recirculation mode is not available when the air
selection switch is in one of the following modes:
• floor/defrost mode
Floor Mode: Directs all airflow through the floor
outlets.
• selection between floor/defrost mode and de-
Selection between Floor Mode and Floor/
Defrost Mode: Directs 75 percent of the airflow
through the floor outlets and 25 percent through
the defrost outlets.
• defrost mode
Floor/Defrost Mode: Directs the airflow equally
to the floor outlets and the defrost outlets. The
recirculation button will not work in this mode.
10. Selection between Floor/Defrost Mode and
Defrost Mode: Directs 75 percent of the airflow
through the defrost outlets and 25 percent
through the floor outlets. The recirculation button
will not work in this mode.
11. Defrost Mode: Directs all airflow through the
defrost outlets. The recirculation button will not
work in this mode.
Temperature Control Switch
The temperature control switch is used to select the
desired temperature. Turn the switch to the left
(counterclockwise) for cool air, or to the right (clockwise) for hot air. There are 21 positions on the temperature control switch ranging from full cool air to
full hot air.
Fresh Air Mode
Fresh air, or outside air, is circulated through the
heating and air conditioning system unless the recirculation mode, if equipped, is turned on.
6.3
Recirculation Mode
frost mode
When the recirculation mode is turned on, it will stay
on for 20 minutes, or until the recirculation button is
pressed again, or the air selection switch is turned to
a defrost mode.
IMPORTANT: On vehicles built before May 2,
2003, the recirculation mode turns off after
twenty minutes and can be turned back on
when the recirculation button is pressed again.
On vehicles built from May 2, 2003, the system
enters a partial recirculation mode for five minutes after being in full recirculation mode for 20
minutes. This cycle repeats as long as the system is in recirculation mode.
NOTE: To prevent the buildup of fumes or odors
inside the cab on a vehicle built before May 2,
2003, do not use the recirculation mode for
more than 20 minutes. It is recommended that
the recirculation mode remains off for five minutes before it is turned back on.
Defrosting
Before using any of the defrost modes, clear the
screen at the base of the windshield if snow or ice is
present.
Heater, Ventilator and Air Conditioner
Air Conditioning, Optional
There are four air conditioning modes on the air selection switch. The air conditioning settings on the air
selection switch are blue, in addition to the selection
between the air conditioning bi-level mode and the
face mode.
IMPORTANT: Operate the air conditioner at
least five minutes each month, even during cool
weather. This helps prevent drying and cracking
of the refrigerant compressor seals and reduces
the chance of refrigerant leaks in the system.
NOTE: The heating and air conditioning system
has a brushless blower motor with a protection
or shutdown mode to prevent damage due to
overheating and overcurrent conditions. If the
brushless blower motor goes into a protection
mode, the motor will operate at a slower speed.
If the overheating or overcurrent condition continues, the motor will shut down and stop completely.
The motor will resume proper operation after the
motor has cooled or the overcurrent condition
has been resolved. It will be necessary to cycle
the fan switch off, and then on, to reset the
motor. If the problem appears repeatedly, take
the vehicle to an Freightliner dealer or authorized service outlet for repairs.
6.4
7
Engines
Aftertreatment System (ATS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.1
Engine Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.9
Cold-Weather Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.10
Starting After Extended Shutdown or Oil Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.10
Engine Break-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.10
Engine Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.10
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.11
Power Takeoff (PTO) Governor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.13
Cold-Weather Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.13
High-Altitude Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.13
Engine Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.14
Engine Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.14
Exhaust Braking Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.15
Engines
Aftertreatment System (ATS)
IMPORTANT: EPA07 and EPA10 emissions
regulations apply to vehicles domiciled in
Canada and the USA at the time of printing this
manual. Vehicles that are domiciled outside of
the USA and Canada may not have EPA07- or
EPA10-compliant engines with an emission aftertreatment system, depending upon local
statutory emissions guidelines.
EPA07 Aftertreatment System (ATS)
On-road diesel engines built after December 31,
2006 are required to meet EPA07 guidelines for reduced exhaust emissions of particulate matter and
nitrogen oxides (NOx). NOx is limited to just over 1
gram per brake horsepower hour (g/bhp-hr), and particulate matter cannot exceed 0.01 g/bhp-hr.
EPA07-compliant engines require ultralow-sulfur diesel (ULSD) fuel, and they should never be run on
fuel with sulfur content higher than 15 ppm. In addition, they require low-ash engine oil. The following
guidelines must be followed, or the warranty may be
compromised.
• Use ultralow-sulfur diesel (ULSD) with 15 ppm
sulfur content or less, based on ASTM D2622
test procedure.
• Do not use fuel blended with used engine lube
oil or kerosene.
• Engine lube oil must have a sulfated ash level
less than 1.0 wt %, meeting the API CJ-4 index
specifications.
IMPORTANT: Using non-specification fuels or
oils can lead to shortened diesel particulate filter
(DPF) cleaning or exchange intervals. For example, using CI-4+ oil with 1.3% sulfated ash
(30% more ash content) may result in the need
for DPF cleaning or exchange 20 to 30% sooner
than would normally be required.
The "exhaust system" in EPA07-compliant vehicles is
called the aftertreatment system (ATS). The ATS varies according to engine manufacturer and vehicle
configuration, but instead of a muffler, an aftertreatment system has a device that outwardly resembles
a muffler, called the aftertreatment device (ATD).
7.1
IMPORTANT: See your engine operation manual
for complete details and operation of the aftertreatment system.
Inside the ATD on Mercedes-Benz, Detroit Diesel,
and Cummins engines, the exhaust first passes over
the diesel oxidation catalyst (DOC), then it passes
through the DPF, which traps soot particles. If exhaust temperature is high enough, the trapped soot
is reduced to ash, in a process called passive regeneration (regen). Passive regeneration occurs as the
vehicle is driven normally under load; the driver is
not even aware that it is happening. The harder an
EPA07 engine works, the better it disposes of soot,
as the exhaust heat alone is enough to burn the soot
to ash. Over the course of a workday, however, passive regeneration cannot always keep the ATD filter
clean, so the filter must undergo active regeneration.
In active regeneration, extra fuel is injected into the
exhaust stream to superheat the soot trapped in the
DPF and turn it to ash. Active regeneration happens
only when the vehicle is moving above a certain
speed, determined by the engine manufacturer. Consult manufacturers’ documentation for details. Both
active and passive regeneration happen automatically, without driver input.
If conditions do not provide for at-speed active regeneration, the vehicle will need a driver-activated
parked regeneration. The vehicle must be standing
still, and the driver must initiate parked regen. Completing a parked regen takes 20 minutes to an hour,
depending on ambient conditions.
DANGER
During parked regeneration, exhaust temperatures are very high, and could cause a fire, heat
damage to objects or materials, or personal injury to persons near the exhaust outlet.
Before initiating a parked regeneration, make certain the exhaust outlets are directed away from
structures, trees, vegetation, flammable materials, and anything else that may be damaged or
injured by prolonged exposure to high heat.
There are three warning lamps in the driver message
center that alert the driver of the need to perform a
parked regen, clean the filter, or of an engine fault
that affects the emissions.
Engines
A slow (10-second) flash of the high exhaust system
temperature (HEST) lamp, indicates a regeneration is
in progress, and the driver is not controlling the engine idle speed.
A solid illuminated high exhaust system temperature
(HEST) lamp, alerts the operator of high exhaust
temperature during the regeneration process, when
the speed is below 5 mph (8 km/h). See Fig. 7.1.
The HEST lamp does not indicate the need for any
kind of vehicle or engine service; it only alerts the
vehicle operator of high exhaust temperatures. The
driver must be careful that the exhaust pipe outlet is
not directed at any person, or at any object or material that can be damaged or ignited by the heat.
yellow DPF lamp indicates that a parked regen is
required immediately, or an engine derate may occur.
09/25/2006
f610815a
Fig. 7.2, Diesel Particulate Filter (DPF) Status Lamp
A solid yellow malfunction indicator lamp (MIL) indicates an engine fault that affects the emissions. See
Fig. 7.3.
Diesel particulate filter servicing must be performed
by an authorized service facility, and a record must
be maintained for warranty purposes. The record
must include:
• date of cleaning or replacement;
09/25/2006
f610816a
Fig. 7.1, High Exhaust System Temperature (HEST)
Lamp
• vehicle mileage;
• particulate filter part number and serial number.
WARNING
Active regeneration can occur automatically anytime the vehicle is moving. The exhaust gas temperature could reach 1500°F (800°C), which is hot
enough to cause a fire, heat damage to objects
or materials, or personal injury to persons near
the exhaust outlet. See Regen-Inhibit Switch later
in this chapter for instructions on preventing automatic regen if necessary.
The exhaust temperature can remain high even
after the vehicle has stopped. When stopping the
vehicle shortly after an automatic regen, ensure
the exhaust outlets are directed away from structures, trees, vegetation, flammable materials, and
anything else that may be damaged or injured by
exposure to high heat
A steady yellow DPF lamp indicates that a parked
regen is required soon, and should be scheduled for
the earliest convenient time. See Fig. 7.2. A blinking
09/25/2006
f610814a
Fig. 7.3, Malfunction Indicator Lamp (MIL)
The request regen switch is located on the dash.
See Fig. 7.4 . The function of the switch varies by
the engine make and model in the vehicle. See the
engine operation manual for switch operation details.
NOTE: The regen switch can start an active
regen only when the DPF light is illuminated
7.2
Engines
because the engine software calls for a manual
regen.
The regen-inhibit switch provides additional control
over the aftertreatment regeneration process. A driver
may decide to use this feature if they are hauling
cargo that should not be exposed to possible high
exhaust temperatures from an automatic regen.
When activated, the inhibit switch will stop a regeneration cycle in progress, and prevent the start of a
regeneration cycle until the switch is no longer active. See Fig. 7.5.
To meet EPA guidelines, diesel engines installed in
Daimler Trucks North America (DTNA) chassis for
domicile in Canada and the USA use an aftertreatment system (ATS) with an aftertreatment device
(ATD) and Selective Catalytic Reduction (SCR) technology to reduce NOx downstream of the engine.
NOTICE
Using non-specification fluids can result in serious damage to the ATS. It is extremely important
that the following guidelines be followed for vehicles with EPA10-compliant engines, or damage
may occur to the ATD, and the warranty may be
compromised.
• Use ultralow-sulfur diesel with 15 ppm sulfur
content or less.
• Do not use fuel blended with used engine lube
oil or kerosene.
• Engine lube oil must have a sulfated ash level
less than 1.0 wt %; currently referred to as
CJ-4 oil.
10/02/2006
f610848
the DEF tank.
Fig. 7.4, Request Regen Switch
f610944
07/30/2009
Fig. 7.5, Regen-Inhibit Switch
EPA10 Aftertreatment System (ATS)
The EPA mandates that all engines built after December 31, 2009 must reduce the level of emissions
exhausted by the engine to the following levels:
• Nitrogen Oxides (NOx) – 0.2 g/bhp-hr
• Particulate Matter (PM) – .01 g/bhp-hr
7.3
• Use only certified diesel exhaust fluid (DEF) in
After exhaust gasses leave the engine, they flow into
the ATS. First they flow into a two-part ATD, comprised of a diesel oxidation catalyst (DOC), and a
diesel particulate filter (DPF). The DPF traps soot
particles, then exhaust heat converts the soot to ash
in the DPF, in a process called regeneration (regen).
The harder an engine works, the better it disposes of
soot. When the engine is running under load and
regen occurs without input, it is called passive regen.
If the engine isn’t running hot enough, the electronic
controls may initiate an active regen, whereby extra
fuel is injected into the exhaust stream before the
diesel particulate filter, to superheat the soot trapped
in the filter and burn it to ash. Both types of regen
occur without driver input.
WARNING
Active regeneration can occur automatically anytime the vehicle is moving. The exhaust gas temperature could reach 1500°F (800°C), which is hot
enough to cause a fire, heat damage to objects
or materials, or personal injury to persons near
the exhaust outlet. See Regen-Inhibit Switch later
Engines
• An illuminated DEF warning lamp in the gauge,
in this chapter for instructions on preventing automatic regen if necessary.
The exhaust temperature can remain high even
after the vehicle has stopped. When stopping the
vehicle shortly after an automatic regen, ensure
the exhaust outlets are directed away from structures, trees, vegetation, flammable materials, and
anything else that may be damaged or injured by
exposure to high heat
Operating at reduced engine load will allow soot to
accumulate in the DPF. When this occurs, the DPF
lamp illuminates, indicating that a regen must be performed, and the driver must either bring the vehicle
up to highway speed to increase the load, or park
the vehicle and initiate a parked regen. See Parked
Regen, later in this chapter for instructions.
After the exhaust stream passes through the ATD, it
flows through another canister housing the SCR device. A controlled quantity of diesel exhaust fluid
(DEF) is injected into the exhaust stream, where heat
converts it to ammonia (NH3) gas. This mixture flows
through the SCR device, where the ammonia gas
reacts with the NOx in the exhaust, to produce harmless nitrogen (N2) and water vapor (H2O), which then
exits out of the tailpipe.
ATS Warning Lamps
The malfunction indicator lamp (MIL) illuminates to
indicate a fault that affects the emissions. See
Fig. 7.3.
Warning lamps in the driver’s message center alert
the driver of situations with the aftertreatment system. A decal attached to the driver’s sun visor explains the aftertreatment system DPF, HEST, and
DEF warning lamps. See Fig. 7.6.
• An illuminated DPF lamp indicates a regen is
needed.
• A slow, 10-second flashing of the HEST lamp
alerts the driver that a parked regen is in
progress, but the exhaust temperatures are still
relatively cool. It also indicates that the highidle speed is being controlled by the engine
software, not the driver.
• A steadily illuminated HEST lamp alerts the
operator of high exhaust temperatures when
vehicle speed is below 5 mph (8 km/h) while it
is performing an automatic regen, and during a
parked regen.
indicates that the DEF tank should be refilled
at the next opportunity.
Parked Regen
DANGER
During parked regeneration, exhaust temperatures are very high, and could cause a fire, heat
damage to objects or materials, or personal injury to persons near the exhaust outlet.
Before initiating a parked regeneration, make certain the exhaust outlets are directed away from
structures, trees, vegetation, flammable materials, and anything else that may be damaged or
injured by prolonged exposure to high heat.
See Fig. 7.7 for an explanation the ATS warnings,
and actions required to avoid further engine protection sequences.
The regen switch, located on the dash, is used to
initiate a parked regen of the aftertreatment device. It
is a momentary switch, that you press and hold for 4
seconds to activate. See Fig. 7.4.
NOTE: The regen switch can initiate a parked
regen only when the DPF lamp is illuminated
(because the engine software is signaling for a
parked regen.)
The regen-inhibit switch provides additional control
over the aftertreatment regeneration process. A driver
may decide to use this feature if they are hauling
cargo that should not be exposed to possible high
exhaust temperatures from an automatic regen.
When activated, the inhibit switch will stop a regeneration cycle in progress, and prevent the start of a
regeneration cycle until the switch is no longer active. See Fig. 7.5.
To initiate a parked regeneration, perform the following steps.
1.
Park the vehicle away from all combustible and
flammable materials. Chock the tires. Start and
warm the engine until the coolant temperature is
at least 150°F (66°C).
2.
Set the parking brake. If the parking brake was
already set, you must release it, then set it
again.
7.4
Engines
IMPORTANT
DPF Regen Needed
1
2
Diesel Particulate Filter (DPF)
regeneration is needed.
If flashing, regenerate as soon as
possible. Engine derate possible.
Hot exhaust can cause fire.
Hot Exhaust
Keep flammables and people away
from exhaust.
3
DEF Refill Needed
DEF
Diesel Exhaust Fluid (DEF) level is
low. Engine derate likely.
Refill tank with certified DEF.
See operator’s manual for complete instructions.
24−01656−000
11/30/2010
1. DPF Warning Lamp
f080161
2. HEST Warning Lamp
3. DEF Warning Lamp
Fig. 7.6, Warning-Lamp Decal, Sunvisor
For manual transmissions, fully depress the
clutch pedal, put the transmission in neutral, then
release the pedal.
5.
If the vehicle has a two-pedal automated transmission, shift it into gear, then back to neutral.
DPF Maintenance
IMPORTANT: The driver must remain with the
vehicle during the entire regen cycle.
3.
Press and hold the regen switch for 4 seconds.
The engine will increase rpm and initiate the
regen process.
4.
After the parked regen has run for 20 to 40 minutes, the regen cycle is completed. The engine
idle speed will drop to normal, and the vehicle
may be driven normally. The HEST lamp may be
illuminated, but will go out when the vehicle
speed exceeds 5 mph (8 km/h), or the system
has cooled to normal operating temperature.
7.5
To stop a parked regen at any time during the
process, engage the clutch, brake, or throttle
pedal, or turn off the engine.
Eventually ash will accumulate in the DPF and the
filter will require servicing. DPF servicing must be
performed by an authorized technician, following the
engine manufacturer’s instructions. A record must be
maintained for warranty purposes, that includes:
• date of cleaning or replacement;
• vehicle mileage;
• particulate filter part number and serial number.
DEF
DEF is used in the aftertreatment system to lower
NOx in the exhaust stream. DEF is colorless and
Engines
EXHAUST AFTERTREATMENT SYSTEM INFORMATION
WARNING
INDICATOR
LAMP(S)
CHECK
(Solid)
(Flashing)
Level 1
Level 2
(Flashing)
CHECK
STOP
(Flashing)
Level 3
Level 4
Indicator Lamp
Message(s)
Filter Regeneration
Recommended
Filter Regeneration
Necessary
Parked Regeneration
Required − Engine
Derate
Parked Regeneration Required −
Engine Shut Down
Diesel Particulate
Filter Condition
Filter is reaching
capacity.
Filter is now
reaching maximum
capacity.
Switch.
Filter has reached
maximum capacity.
Filter has exceeded
maximum capacity.
Required Action
Bring vehicle to
highway speeds to
allow for an Automatic
Regeneration or
perform a Parked
Regeneration.
To avoid engine
derate bring vehicle
to highway speeds
to allow for an
Automatic
Regeneration or
perform a Parked
Regeneration as
soon as possible.
Vehicle must be
parked and a Parked
Regeneration must
be performed −
engine will begin
derate.
Vehicle must be parked and a
Parked Regeneration or Service
Regeneration must be performed.
Check engine operator’s manual
for details −engine will shut down.
HEST (High Exhaust
System Temperature)
Flashing
A regeneration is in
progress.
Solid
Exhaust Components
and exhaust gas are
at high temperature.
When stationary, keep
away from people and
flammable materials
or vapors.
For a driver performed Parked Regeneration, vehicle must be equipped with a dash mounted Regeneration Switch.
See Engine Operator’s Manual for complete Regeneration Instructions.
24−01583−000B
06/29/2009
f080147
Fig. 7.7, Exhaust-Aftertreatment Warnings
close to odorless. (It may have a slightly pungent
odor similar to ammonia.) It is nontoxic, nonflammable and biodegradable. It is mildly corrosive to
aluminum, but it will not affect the strength or structure of the aluminum. A white powder may be noticeable around components that the DEF comes in contact with. Around 12°F (-11°C) DEF freezes to slush,
but is not damaged or destroyed if frozen, and is fully
usable when thawed. The DEF supply lines are electrically heated and are purged when the engine is
shut down. The DEF in the tank is allowed to freeze
while the vehicle is non-operational. At start up, normal operation of the vehicle is not inhibited if the
DEF is frozen; an immersion heater with engine coolant flowing through it will warm the DEF once the
engine is running, to allow the SCR system to operate.
DEF Tank
EPA10-compliant vehicles are equipped with a DEF
tank located on the driver’s side of the vehicle, usually behind the battery box, or an optional location
forward of the fuel tank for day cab configurations.
See Fig. 7.8, and Fig. 7.9. The DEF tank has a 19
mm filler neck inlet that prevents the hose from a
diesel outlet from being inserted, and has a blue cap
for easy identification.
1
2
f470542
07/24/2009
1. Batteries
2. DEF Tank
Fig. 7.8, DEF Tank Located Behind the Battery Box
DEF consumption will vary depending on ambient
conditions and vehicle application.
7.6
Engines
Fuel/DEF Gauge
DEF Warnings and Engine Derates
The diesel fuel and DEF levels are measured in a
dual purpose gauge. See Fig. 7.10.
IMPORTANT: Ignoring the DEF warning lights
will result in limited engine power, with a speed
limit of 5 mph (8 km/h) eventually being applied.
The diesel-fuel level is indicated at the top of the
gauge. Below the fuel level, a diesel-fuel warning
lamp illuminates amber when the diesel fuel level
drops below 1/8th of the capacity.
The lower portion of the gauge has a DEF warning
lamp that illuminates amber when the DEF tank is
near empty, and a lightbar that indicates the level of
DEF in the tank. The DEF light bar illuminates as
follows.
• Four bars illuminated green—Between 75%
and 100% full.
• Three bars illuminated green—Between 50%
and 75% full.
• Two bars illuminated green—Between 25%
and 50% full.
• One bar illuminated green—Between approxi-
mately 10% and 25% full.
• One bar illuminated amber—DEF very low, re-
fill DEF.
DEF Level Low—Initial Warning
When the DEF level reads low the following warnings
strongly encourage the driver to refill the DEF tank:
• One bar of the DEF level indicator illuminates
amber—DEF very low, refill DEF
• DEF warning lamp illuminates solid amber
See Fig. 7.11.
The DEF tank must be filled to cancel the warning
sequence.
DEF Empty
When the DEF level reads empty, the following warnings are activated:
• One bar of the DEF level indicator flashes
red—DEF empty, refill DEF
• DEF warning lamp flashes amber
• MIL lamp illuminates
• CHECK engine lamp illuminates for Cummins
ISB and ISC/L engines
Detroit Diesel engines: Power is limited, with a 55
mph (90 km/h) speed limit.
Cummins engines: Power is limited with progressively harsher engine power limits applied.
See Fig. 7.12.
The DEF tank must be filled to cancel the warning
sequence.
DEF Level Empty and Ignored
1
2
f470541
07/24/2009
1. DEF Tank
2. Fuel Tank
Fig. 7.9, DEF Tank Located Forward of the Fuel Tank
• One bar flashing red—DEF empty, refill DEF.
7.7
If the empty warning is ignored and the DEF is not
refilled, the red STOP engine lamp illuminates in addition to the DEF warning lamp, MIL, (and CHECK
engine lamp if Cummins ISB or ISC/L engine.) See
Fig. 7.13.
If the DEF is not refilled, a 5 mph (8 km/h) speed
limit will be applied after the next engine shut down
or while parked and idling.
Engines
1/2
1/2
1/2
ULTRA LOW SULFUR
DIESEL FUEL ONLY
ULTRA LOW SULFUR
DIESEL FUEL ONLY
ULTRA LOW SULFUR
DIESEL FUEL ONLY
E
F
E
DEF
E
1
F
E
DEF
F
E
2
A
F
DEF
F
E
B
F
C
11/08/2010
f611037
A. Green bars—DEF level indicators
B. One bar illuminated amber—DEF very low, refill DEF
1. Diesel Fuel Warning Lamp
C. One bar flashing red—DEF empty, refill DEF
2. DEF Warning Lamp
Fig. 7.10, Fuel/DEF Gauge
A
A
B
B
07/09/2009
f470537
A. DEF Warning Lamp (illuminated)
B. DEF Lightbar (one bar amber)
Fig. 7.11, DEF Level Low Initial Warning
DEF Quality or SCR Tampering
11/08/2010
f470539a
NOTE: MIL illuminates. CHECK engine lamp illuminates
if Cummins ISB or ISC/L engine. Engine power is limited.
A. DEF Warning Lamp (flashing)
B. DEF Lightbar (one bar flashing red)
Fig. 7.12, DEF Empty Warning
NOTICE
Once contaminated DEF or tampering has been
detected in the SCR system, the vehicle must be
taken to an authorized service center to check
the SCR system for damage, and to deactivate
the warning lights and engine limits.
If contaminated DEF or tampering is detected the
DEF warning light flashes, and the MIL illuminates to
warn the driver. The CHECK engine lamp also illuminates if the vehicle has a Cummins ISB or ISC/L engine. See Fig. 7.13.
Detroit Diesel engines: Power is limited, with a 55
mph (90 km/h) speed limit. If the fault is not corrected the STOP engine light illuminates, and a 5
mph (8 km/h) speed limit will be applied after the
next engine shut down, or while parked and idling.
Cummins engines: Power is limited with progressively harsher engine power limits applied. If the fault
is not corrected the STOP engine light illuminates,
and a 5 mph (8 km/h) speed limit will be applied after
the next engine shut down, or while parked and
idling.
7.8
Engines
Ring gear and starter pinion damage caused by
improper starting procedures is not warrantable.
A
Pre-Start
NOTE: These pre-start steps apply to all engines.
B
11/08/2010
f470540a
NOTE: STOP engine light illuminates. Engine power
limited, speed limit of 5 mph (8 km/h)
A. DEF Warning Lamp (flashing)
B. DEF Lightbar (one bar flashing red)
1.
Perform the engine pretrip inspection and daily
maintenance checks in Chapter 11.
2.
Set the parking brake.
3.
For manual transmissions, place the transmission in neutral and disengage the clutch.
For automatic transmissions, make sure the
transmission shift control is in neutral or park.
Fig. 7.13, DEF Empty and Ignored Warning
Engine Starting
For cold-weather starting, refer to "Cold Weather
Starting" later in this chapter.
Whenever you start an engine, watch for any signs
of engine problems. If the engine vibrates, misfires,
or makes unusual noises, turn the engine off as soon
as possible and determine the cause of the problem.
Frequently, engine damage may be avoided by a
quick response to early indications of problems.
NOTICE
NOTE: On vehicles equipped with a neutral start
switch, the transmission must be in neutral before the engine can be started. For air start systems, check the air supply before starting the
engine. There must be 100 psi (689 kPa) of air
pressure available.
4.
Turn the ignition switch to the ON position
(Fig. 7.14). All the electronic gauges on the ICU
(instrumentation control unit) complete a full
sweep of their dials, the warning and indicator
lights light up, and the buzzer sounds for three
seconds.
When starting a vehicle equipped with a manual
transmission and clutch lockout switch, the
clutch pedal must be fully depressed during the
entire start sequence. Failure to do so can cause
the pinion to release and re-engage, which could
cause ring gear and starter pinion damage.
If a vehicle does not start on the first attempt,
make sure that the engine has completely
stopped rotating before reapplying the starter
switch. Failure to do so can cause the pinion to
release and re-engage, which could cause ring
gear and starter pinion damage.
Moving a vehicle with the starter and/or using the
starter to bump the engine for maintenance procedures is strictly prohibited. Use of these methods to bump the engine over or move the vehicle
can cause the pinion to release and re-engage,
which could cause ring gear and starter pinion
damage.
7.9
09/12/2001
f610509
Fig. 7.14, Ignition Switch Positions
Engines
Starting Precautions, All Engines
WARNING
Never pour fuel or other flammable liquid into the
air inlet opening in the air intake in an attempt to
start the vehicle. This could result in a flash fire
causing serious personal injury or property damage.
NOTICE
Do not crank the engine for more than 30 seconds at a time. Wait two minutes after each try to
allow the starter to cool. Failure to do so could
cause starter damage.
NOTE: Some starters are equipped with optional overcrank protection. If overcranking occurs, a thermostat breaks the electrical circuit to
the starter motor until the motor has cooled.
NOTICE
Protect the turbocharger during the start-up by
not opening the throttle or accelerating the engine above 1000 rpm until minimum engine idle
oil pressure registers on the gauge. Failure to do
so could damage the turbocharger.
Cold-Weather Starting
Electronic engines do not normally require special
starting aids. At low temperatures, oil pan heaters or
water jacket heaters are sometimes used to assist in
starting. See the engine manufacturer’s operation
manual for starting aids that are approved for specific
engines.
Starting After Extended
Shutdown or Oil Change
An engine in storage for an extended period of time
(over winter, for example) may accumulate water in
the oil pan through normal condensation of moisture
on the internal surfaces of the engine. Oil diluted by
water cannot provide adequate bearing protection at
start-up. For this reason, change the engine oil and
filters after extended storage.
NOTICE
Failure to eliminate water-diluted lubricating oil
may lead to serious engine damage at startup.
Before engine start-up, complete the engine pretrip
and post-trip inspections and maintenance procedures in Chapter 11.
Engine Break-In
Every engine is tested on a dynamometer before
shipment, eliminating the need for a break-in period.
Before running the engine for the first time, follow the
instructions in the engine manufacturer’s operation
manual.
Engine Operation
DANGER
Do not operate the engine in an area where flammable vapors such as gasoline or diesel fumes
are present. Shut down the engine when in an
area where flammable liquids or gases are being
handled. Failure to observe these precautions
could result in serious injury or death.
All Freightliner diesel engines comply with the requirements of the Federal (U.S.) Clean Air Act. Once
an engine is placed in service, the responsibility for
meeting both state and local regulations is with the
owner/operator.
IMPORTANT: EPA07 and EPA10 emissions
regulations apply to vehicles domiciled in
Canada and the USA at the time of printing this
manual. Vehicles that are domiciled outside of
the USA and Canada may not have EPA07- or
EPA10-compliant engines with an emission aftertreatment system, depending upon local
statutory emissions guidelines.
NOTICE
It is extremely important that the following points
be followed for vehicles with EPA07- or EPA10compliant engines, or damage may occur to the
aftertreatment device, and the warranty may be
compromised.
7.10
Engines
• Use ultralow-sulfur diesel with 15 ppm sulfur
content or less.
Cruise Control
• Do not use fuel blended with used engine lube
WARNING
oil or kerosene.
• Engine lube oil must have a sulfated ash level
less than 1.0 wt %; currently referred to as
CJ-4 oil.
• Adequate maintenance of the engine and the
diesel-particulate filter are the responsibility of
the owner/operator, and are essential to keep
the emission levels low. Good operating practices, regular maintenance, and correct adjustments are factors that will help to stay within
the regulations.
The driver should be familiar with the vehicle warning
system in order to bring the vehicle to a safe stop if
the engine malfunctions. If the driver doesn’t understand how the warning system works, an engine
shutdown could occur, causing a safety hazard. See
Chapter 3 for information.
All engines have an operating range specific to that
engine in which the engine performs most efficiently.
The operating range extends from maximum torque
rpm at the low end to engine rated speed at the high
end. Most engines deliver best fuel economy when
operated in the low- and mid-speed segments of the
efficiency range and produce maximum horsepower
at rated speed, which is also the recommended
maximum speed of the engine. For specifics for any
engine refer to the engine manufacturer’s operation
manual.
Prolonged idling of engines is not recommended, and
is illegal in some states. The belief that idling a diesel engine causes no engine damage is wrong. Idling
produces sulfuric acid, that is absorbed by the lubricating oil, and eats into bearings, rings, valve stems,
and engine surfaces. If you must idle the engine for
cab heat or cooling, the high idle function of the
cruise control switches should be used. An idle
speed of 900 rpm should be enough to provide cab
heat in above freezing ambient temperatures.
If the engine is programmed with the idle shutdown
timer, ninety seconds before the preset shutdown
time, the CHECK ENGINE light will begin to flash at
a rapid rate. If the position of the clutch pedal or service brake changes during this final ninety seconds
(CHECK ENGINE lamp flashing) the idle shutdown
timer will be disabled until reset.
7.11
Do not use the cruise control system when driving conditions do not permit maintaining a constant speed, such as in heavy traffic or on roads
that are winding, icy, snow-covered, slippery, or
roads with a loose driving surface. Failure to follow this precaution could cause a collision or
loss of vehicle control, possibly resulting in personal injury or property damage.
Dash-Mounted Switches
NOTICE
Do not attempt to shift gears without using the
clutch pedal when the cruise control is engaged.
Failure to follow this precaution will result in a
temporarily uncontrolled increase in engine
speed; transmission damage and gear stripping
could result.
On standard models, cruise control is activated by
two dash switches (Fig. 7.15).
• The On/Off Switch—this two-position rocker
switch bears the legend SPD CNTL on the
lower half of the switch. When cruise control is
on, an amber light illuminates in the top part of
the switch.
• The Set/Resume Switch—this three-position
paddle switch bears the legend RES/ACC
above the paddle and SET/CST below the
paddle.
1.
2.
To cruise at a particular speed, do these steps:
1.1
Press the upper half of the On/Off (rocker)
switch on the instrument panel.
1.2
Hold the accelerator pedal down until the
speedometer reaches the desired speed.
1.3
Momentarily lower the paddle of the Set/
Resume switch to SET/CST.
To disengage the cruise control, do these steps:
2.1
Press down the brake pedal (on automatic
or manual transmission) or
Press down the clutch pedal (on manual
transmission only)
Engines
Shift Knob Controls, Optional
Cruise control can also be activated by the optional
PAUSE, RESUME, and SET buttons on the transmission shift knob (Fig. 7.16).
1
2
f610510
09/13/2001
To turn cruise control on, press the upper half of the On/
Off (rocker) switch. To turn cruise control off, press the
lower half of the On/Off (rocker) switch.
1. Cruise Control On/Off (rocker) Switch
2. Cruise Control Set/Resume (paddle) Switch
Fig. 7.16, Cruise Control Buttons on the Transmission
Shift Knob
1.
Fig. 7.15, Cruise Control Switches, Dash-Mounted
2.2
3.
Press the lower half of the On/Off (rocker)
switch on the instrument panel.
To resume a preselected cruise speed, do these
steps:
3.1
If the On/Off (rocker) switch on the instrument panel is off, turn it on.
3.2
Momentarily raise the paddle of the Set/
Resume switch to RES/ACC. Cruise will
return to the last speed selected.
NOTE: If the ignition is shut off, the speed
memory will be lost.
4.
5.
To adjust cruise speed up, raise the paddle of
the Set/Resume switch to RES/ACC and hold it
there until the vehicle accelerates to the new
speed, as desired.
To adjust cruise speed down, lower the paddle of
the Set/Resume switch to SET/CST and hold it
there until the vehicle decelerates to the new
speed, as desired.
f260316
05/23/95
2.
To cruise at a particular speed, do these steps:
1.1
Hold the accelerator pedal down until the
speedometer reaches the desired speed.
1.2
Push the SET button on the transmission
shift knob.
To disengage the cruise control, do these steps:
2.1
Press down the brake pedal (on automatic
and manual transmission) or
Press down the clutch pedal (on manual
transmission only)
2.2
3.
Push the PAUSE button on the transmission shift knob.
To resume a preselected cruise speed, push the
RESUME button on the transmission shift knob.
Cruise will return to the last speed selected.
NOTE: If the ignition is shut off, the speed
memory will be lost.
4.
To adjust cruise speed up, push the SET button
and hold it in until the vehicle accelerates to the
new speed, as desired.
7.12
Engines
5.
To adjust cruise speed down, push the RESUME
button and hold it in until the vehicle decelerates
to the new speed, as desired.
cold weather for your engine, see the engine manufacturer’s engine operation manual, supplied in the
vehicle documentation package.
Power Takeoff (PTO) Governor
If satisfactory engine temperature is not maintained,
maintenance costs will increase due to greater engine wear. If the engine coolant temperature becomes too low, raw fuel will wash the lubricating oil
off the cylinder walls and dilute the crankcase oil,
causing all moving parts of the engine to suffer from
poor lubrication.
Front Engine Power Take Offs (PTO) are devices
used to tap into engine power to run auxiliary devices. Common uses are vehicles with hydraulic
pumps which power additional equipment. The following instructions are general guidelines for operating a PTO.
1.
Set the parking brake. Shift the transmission to
neutral.
If the engine is in good mechanical condition and the
precautions necessary for cold-weather operation are
taken, ordinary cold weather will not cause difficulty
in starting, or loss of efficiency.
2.
Press the dash PTO switch. Release the switch
when the light begins to blink.
The following points are important to observe when
operating in cold weather:
When the light comes on steadily, the PTO is
engaged and ready to operate. In stationary
mode, the vehicle must remain in neutral with the
parking brake set.
3.
4.
To activate the mobile mode, shift from neutral to
reverse, 1st, or 2nd gear. The clutch will open
and the PTO will disengage for a moment.
Touch the throttle pedal to close the clutch and
engage the PTO in mobile mode. The PTO may
be operated with the transmission in the following gears only: R-N-1-2.
NOTE: Do not attempt to change gears while
the vehicle is moving. The transmission will ignore the request.
• Check for cracks in the batteries, for corrosion
of the terminals, and for tightness of the cable
clamps at the terminals.
• Charge the batteries to full capacity. Replace
any battery that is damaged.
• If so equipped, turn off the load disconnect
switch after the engine is shut down, to prevent
battery discharge.
• Have the alternator output checked at an au-
thorized service provider.
• Check the condition and tension of the drive
belts.
• Refer to the engine manufacturer’s engine op-
5.
To end the mobile mode, bring the vehicle to a
stop. The clutch will open and shut off power to
the PTO.
eration manual for recommended heaters, lowviscosity lubricating oils, wintergrade fuels, and
approved coolants.
6.
To resume stationary mode, shift to neutral. The
PTO will engage.
7.
To end stationary mode, press the dash switch.
When the light in the switch goes out, power to
the PTO is shut off. Shut down the engine.
A winterfront may be used to improve cab heating
while idling. If a winterfront is used, at least 25% of
the grille opening should remain open in sectioned
stripes that run perpendicular to the charge-air-cooler
tube-flow dirrection. This assures even cooling
across each tube, and reduces header to tube
stress, and possible failure. Winterfronts should only
be used when the ambient temperature remains
below 10°F (-12°C).
Cold-Weather Operation
Satisfactory performance of a diesel engine operating
in low ambient temperatures requires modification of
the engine, surrounding equipment, operating practices, and maintenance procedures. The lower the
temperature, the greater the amount of modification
required. For service products approved for use in
7.13
High-Altitude Operation
Engines lose horsepower when operated at high altitude because the air is too thin to burn as much fuel
as at sea level. This loss is about three percent for
Engines
each 1000 feet (300 m) altitude above sea level for a
naturally aspirated engine.
All engines used on M2 vehicles are altitudecompensated by the use of a turbocharger. This reduces smoky exhaust at high altitudes, requires less
downshifting, and allows the engine to make better
use of its fuel. Nevertheless, shift gears as needed to
avoid excessive exhaust smoke.
To turn the two-position On/Off Switch on, raise the
paddle. When the two-position switch is on, an
amber LED (light-emitting diode) illuminates inside
the switch.
To turn the two-position HI-LO Switch on high, raise
the paddle (at the HI-LO legend). To turn the twoposition HI-LO Switch on low, lower the paddle (at
the ENG BRK legend). See Fig. 7.17.
Engine Shutdown
1.
With the vehicle stopped, apply the parking
brakes and place the transmission in neutral.
1
2
NOTICE
Idle the engine one to two minutes before shutting it down. After hard operation, shutting down
the engine without idling may cause damage to
the turbocharger.
2.
Allow the engine to idle one to two minutes before shutting it down. This allows the lubricating
oil and the coolant to carry heat away from the
combustion chambers, bearings, shafts, and
seals. The extreme heat may cause bearings to
seize or oil seals to leak.
IMPORTANT: Bearings and seals in the turbocharger are subjected to the high heat of combustion exhaust gases. While the engine is running, this heat is carried away by oil circulation,
but if the engine is stopped suddenly, the turbocharger temperature may rise as much as 115°F
(46°C).
NOTICE
Except in an emergency, do not shut down the
engine when the coolant temperature is above
194°F (90°C). To do so could damage the engine.
3.
Turn off the ignition switch and shut down the
engine.
Engine Braking
The engine brake switch controls the degree of engine braking. Normally there are two paddle
switches, a two-position On/Off Switch to activate the
engine brake, and a two-position HI-LO Switch to
control the amount of engine braking.
f610588
10/17/2001
1. On/Off Switch
2. Hi-Lo Switch
Fig. 7.17, Engine Brake Switches
When the panel lights are on, the Hi-Lo legend is
backlit in amber on the three-position switch. On both
the three-position switch and the two-position switch,
the ENG BRK legend is backlit in green when the
panel lights are on.
Whenever vehicle braking is required on good road
conditions, the engine brake may be used in conjunction with the service brakes. There is no time
limit for operation of the engine brake. However, an
engine brake does not provide the precise control
available from the service brakes, and is not a substitute for a service braking system.
WARNING
Usage of the engine brake as the primary braking
system can cause unpredictable stopping distances, that could result in personal injury or
property damage. Service brakes are the primary
vehicle braking system.
Since the engine brake is most effective at rated engine speed, gear selection is very important. Gearing
down the vehicle, within the limits of the rated engine
7.14
Engines
speed, makes the engine brake more effective. Recommended engine braking speed is above 1800 rpm
and below the rated speed.
WARNING
The engine brake must be disengaged when
shifting gears using the clutch pedal. If the engine brake is engaged when the transmission is
in neutral, the braking power of the engine brake
can stall the engine, which could result in loss of
vehicle control, possibly causing personal injury
and property damage.
NOTICE
Do not allow the engine to exceed 2500 rpm. Serious engine damage could result.
"Control speed" is the speed at which the engine
brake performs 100 percent of the required downhill
braking, resulting in a constant speed of descent.
The control speed varies, depending on vehicle
weight and the downhill grade.
For faster descent, select a higher gear than that
used for control speed. Service brakes must then be
used intermittently to prevent engine overspeed and
to maintain desired vehicle speed.
A driver may descend slower than control speed by
selecting a lower gear, being careful not to overspeed the engine. Occasional deactivation of the engine brake may be necessary to maintain the designated road speed under these conditions.
Below a set engine temperature when the engine is
cold, the brake may be disabled depending on the
brake type.
To activate the engine brake after the engine is
warmed up and the vehicle is in motion:
• Remove your feet from both the clutch and
throttle pedals. Press the dash-mounted ENG
BRK switch to toggle the engine brake ON.
The engine brake will engage at the rate last
set on the brake intensity switch.
• Move the intensity switch to the desired inten-
sity. Depending on engine model, LO will provide 1/3 or 1/2 of the full braking capacity of
the engine. HI will provide maximum engine
braking.
7.15
Use the dash-mounted switch set at the LO
position when driving on flat, open stretches of
road. If the service brakes are still required to
slow down on a grade, switch to a higher setting on the dash switch, until there is no need
for the service brakes. Grade descent speed
should be such that the service brakes are
used infrequently and that they remain cool,
thus retaining their effectiveness.
• For maximum retarding, maintain the top gov-
erned speed of the engine through the appropriate selection of gears. When shifting gears,
the engine brake will disengage when the
clutch pedal is depressed, then engage when
the clutch pedal is released.
• To cancel the engine brake application, toggle
the ENG BRK switch OFF.
If the engine is equipped with both cruise control and
an engine brake, the engine brake can operate automatically while in cruise control mode. If the cruise
control/engine brake function is turned on in the
DDEC VI system programming, the engine brake will
come on "low" when the set road speed increases a
few miles-per-hour (kilometers-per-hour) above the
cruise set speed. The maximum amount of braking
(low, medium, high) is selected with the dash
switches. When the vehicle returns to the set cruise
speed, the engine brake will turn off.
The engine brake will only operate when the accelerator pedal is fully released. Disengaging the clutch
will prevent the engine brake from operating.
Vehicles equipped with antilock braking systems
(ABS) have the ability to turn the engine brake off if
a wheel-slip condition is detected. The engine brake
will automatically turn itself back on once the wheel
slip is no longer detected. The DDEC VI system will
deactivate the engine brake system when the engine
speed falls below 1000 rpm or when the vehicle
slows down to a preset speed, depending on DDEC
programming. This prevents stalling the engine.
Exhaust Braking Systems
Exhaust Brake Switch
The optional exhaust brake is controlled by a dashmounted rocker switch to help slow the vehicle when
the accelerator is released.
Engines
To turn the exhaust brake on, press on the upper
part of the rocker (at the light inside the switch). The
exhaust brake turns off automatically. See Fig. 7.18
or Fig. 7.19.
11/28/2001
f610589
When only the exhaust brake is installed, a twoposition switch on the dash controls the engine braking system. The exhaust brake is only active when
the engine speed is between 1100 and 2700 rpm.
Depressing the accelerator or clutch pedal deactivates the exhaust brake. The ABS system, when active, also deactivates the exhaust brake.
The exhaust brake is a butterfly valve mounted in the
exhaust pipe. When the driver’s foot is not on the
accelerator pedal and the upper half of the exhaust
brake switch is pressed in, with the amber light on
the switch illuminated, an air cylinder shuts the butterfly valve, which restricts the flow of exhaust gases
and retards the engine. This retarding action is carried through the engine and drivetrain, slowing the
vehicle and reducing the need for frequent service
brake applications.
Exhaust brakes are not intended for use as the primary braking system during vehicle operation.
Fig. 7.18, Exhaust Brake Switch
Operating Characteristics
WARNING
Do not use the exhaust brake when driving on
slippery or low-traction road surfaces. Failure to
follow this precaution could result in a loss of
vehicle control and possible personal injury or
property damage.
03/31/2009
f610589a
Fig. 7.19, Exhaust Brake Switch
When the exhaust brake switch is on, an amber LED
illuminates inside the switch. When the panel lights
are on, the EXHST BRK legend is backlit in green.
Mercedes-Benz Exhaust Brake
An exhaust brake is an optional auxiliary braking system that assists but does not replace the service
brake system. The exhaust brake can be used alone
or together with the constant-throttle valves for steep
or long grades. The exhaust brake switch located on
the control panel, in combination with the accelerator
and clutch pedals, allows the driver to make maximum use of the exhaust brake in off-highway and
mountain driving as well as in traffic or high-speed
highway driving.
Before starting the engine, make sure that the lower
half of the exhaust brake switch is pressed in and
the amber light is not illuminated. Do not turn the exhaust brake on until the engine has reached normal
operating temperatures.
When you remove your feet from both the accelerator and clutch pedals and the upper half of the exhaust brake switch is pressed in with the amber light
illuminated, the exhaust brake is applied. The following conditions should exist if the brake is operating
properly:
• A slight change in the sound of the engine may
be noticed when the exhaust brake is applied.
• Exhaust smoke should appear normal.
• Engine temperature should remain in the nor-
mal operating range.
• Road speed usually decreases when the ex-
haust brake is applied during a descent. When
the vehicle is carrying a heavy load or the
7.16
Engines
grade is extremely steep, you may need to
apply the service brakes occasionally.
• Do not expect a retarding effect similar to sud-
den hard application of the service brakes. The
exhaust brake retards the vehicle with a
smooth braking effect.
• During a descent, the tachometer usually
shows a drop in rpm, depending on the grade
and the vehicle load.
• Depending on the grade and vehicle load, you
may or may not feel the retarding force acting
against your body when the brake is applied.
The retarding force of the brake may not always be noticed, but it is actually preventing
the vehicle from going much faster.
Make sure the exhaust brake is turned off before
shutting down the engine.
Driving Downhill
While approaching a steep grade, make sure that the
upper half of the exhaust brake switch is pressed in,
with the amber light illuminated. The exhaust brake
comes on as soon as you remove your foot from the
accelerator pedal. While going down the grade, use
a low enough gear to safely descend with a minimum
application of the service brakes. As a general guideline, use the same gear as you would to ascend the
hill.
NOTICE
Do not allow the engine to exceed its governed
speed, or serious engine damage could result.
Apply the service brakes to reduce the engine rpm or
make a slower descent by using a lower gear.
Pacbrake® Exhaust Brake
The Pacbrake exhaust brake is intended as a
supplement to the service brakes and will not bring
the vehicle to a complete stop. The Pacbrake will
assist in the control or reduction of road speed in
conjunction with, or independent of, the service
brakes. The amount of retarding or braking force is
controlled by the driver.
7.17
Pacbrake Operation (Caterpillar)
The Pacbrake is controlled by the exhaust brake
switch and the throttle pedal. All applications are additionally affected, controlled, or governed by engine
speed through transmission gear selection. The Allison MD3060 transmission has automatic downshifting when the exhaust brake is requested. See the
information on the "Allison World Transmission" later
in this chapter.
On some applications, when the Pacbrake is in use,
it may be necessary to check that the cruise control
is not set and that the throttle is in the idle position.
On some applications, the engine, transmission,
cruise control, and the Pacbrake exhaust brake may
electronically interact with each other, which automatically operates their functions. Following are
some examples of the programmed options that may
be available with the cruise control in the on position:
• The coast mode engages the Pacbrake when
the service brake is applied and disengages
when the service brake is released.
• The latch mode engages the Pacbrake when
the service brake is applied and the Pacbrake
remains on after the service brake is released.
The Pacbrake is disengaged when another
input (depressing the throttle or clutch, engine
speed drops below 800 rpm, or the exhaust
brake switch is turned off) is supplied.
• The manual mode does not require the cruise
control switch to be on, and operates the
Pacbrake manually at the driver’s discretion.
The amount of braking power the engine will develop
is related to the speed (rpm) of the engine. The
higher the engine rpm, the greater the retarding
power.
Certain conditions may require that the transmission
be downshifted in order to generate adequate rpm
for the amount of retarding power required. Pacbrake
exhaust brakes are designed and approved for safe
use at 300 rpm above the engine’s maximum governed rpm. Refer to individual engine manufacturer’s
specifications.
The Pacbrake will function best if it is used all of the
time. However, if the vehicle is used inconsistently or
seasonally, it may be necessary to perform a preventive maintenance procedure.
Engines
1.
With the engine shut down, use any oil-free or
nonpetroleum-based high-heat lubricant, and
spray or coat a sufficient amount on the restricter
valve shaft and the attaching locations at each
end of the actuation cylinder. See Fig. 7.20.
A
A
A
03/06/2000
and/or slow the vehicle sufficiently that the transmission will automatically downshift, if necessary, to Allison’s preselect mode.
The preselect mode is normally assigned to second
gear; however, the transmission can be reprogrammed by an Allison Transmission Distributor to
third or fourth gear, should the operator desire. If additional retarding power is required before the automatic downshifting occurs, you can select a lower
transmission gear on the Allison shift selector.
f490228
A. Lubrication Point
Fig. 7.20, Pacbrake Exhaust Brake and Air Cylinder
2.
With your hands or a pair of pliers, motion the
valve several times to distribute the lubricant
down the shaft and the attaching locations.
NOTE: Starting the engine and idling for short
periods of time is not recommended. During a
cold engine start-up, enough moisture is developed within the engine and the exhaust system
to create a corrosion hazard that could affect
the future operation of the Pacbrake. The brake
housing may trap water in the valve shaft bore
causing corrosion in an improperly functioning
or nonfunctioning brake. If it is necessary to periodically start the engine, it is recommended
that normal operating temperatures be attained
before shutting down the engine.
Allison World Transmission
Pacbrake exhaust brakes on engines that are used
with the Allison World Transmission MD series, are
interfaced with the transmission electronic control
module (ECM). An exhaust-brake-enabled transmission ECM will usually provide converter lockup in
gears two through six. Effective exhaust braking begins when the transmission automatically downshifts
into fifth gear (62 mph or less). Once on, the
Pacbrake exhaust brake will control road speed
7.18
8
Drivetrain
Clutches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1
Allison On-Highway Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3
Allison MD Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5
Eaton® Fuller® Straight-Shift Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.8
Eaton Fuller Range-Shift Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.9
Eaton Fuller AutoShift™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12
Freightliner SmartShift Shift Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15
Eaton Fuller UltraShift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15
Mercedes-Benz Manual Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.22
Mercedes-Benz Automated Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.22
Meritor™ Drive Axles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.28
Drivetrain
Clutches
Clutch Operation
Applying the Clutch Brake
The purpose of the clutch brake is to stop the transmission gears from rotating in order to engage the
transmission gears quickly in making an initial start.
To apply the clutch brake, put the transmission in
neutral and press the clutch pedal to the floor.
CAUTION
Never apply the clutch brake while the vehicle is
moving. The clutch pedal should never be
pressed down fully before putting the transmission in neutral. Considerable heat will be generated, which will be detrimental to the friction
discs, release bearings, and transmission front
bearings.
Applying the clutch brake with the transmission still in
gear puts a reverse load on the gear. At the same
time, it will have the effect of trying to stop or decelerate the vehicle with the clutch brake. Rapid wear of
friction discs will take place necessitating frequent replacement.
Vehicle Overload, or Overloading the
Clutch
CAUTION
Overloading will not only result in damage to the
clutch, but also to the entire powertrain.
Clutches are designed for specific vehicle applications and loads. These limitations should not be exceeded.
Riding the Clutch Pedal
Riding the clutch pedal is destructive to the clutch.
Partial clutch engagement permits slippage, and generates excessive heat. Riding the clutch pedal will
also put a constant thrust load on the release bearing, which can thin out the lubricant. Release bearing
failures can be attributed to this type of misuse.
8.1
Holding the Vehicle on an Incline With a
Slipping Clutch
A slipping clutch accumulates heat faster than it can
be dissipated, resulting in early clutch failures. Never
use the clutch to hold a vehicle on a hill.
Coasting With the Clutch Released
(pedal down) and the Transmission in
Gear
WARNING
Do not coast with the clutch released (pedal depressed) and the transmission in gear. High
driven-disc rpm could cause the clutch facing to
be thrown off the disc. Flying debris could cause
injury to persons in the cab.
If the transmission remains in a low gear and the vehicle gains speed, as may occur on a downgrade,
the input shaft and clutch driven disc will turn at
speeds that are higher than normal. This occurs because the rear wheels and the driveline become the
input for the transmission, and a higher-than-normal
speed for a given transmission gear translates to a
higher rpm value for the clutch driven disc.
Clutch driven discs are designed to allow for some
amount of excess rotational speed, but the facing
has a limited burst strength. If the clutch driven disc
rpm increases too much, the clutch facing can be
thrown off the disc(s).
Engaging the Clutch While Coasting
Engaging the clutch while coasting can result in tremendous shock loads and possible damage to the
clutch as well as to the entire drivetrain.
Report Erratic Clutch Operation Promptly
Reporting erratic clutch operation as soon as possible will give maintenance personnel a chance to
inspect the clutch components.
CAUTION
Operating the vehicle with incorrect clutch pedal
free-travel could result in clutch damage. See
Group 25 of the Business Class® M2 Workshop
Manual for free-pedal adjustment procedures and
specifications.
Drivetrain
On mechanical clutch linkages, free-pedal travel
should be included and commented on daily in the
driver’s report, since clutch free-pedal travel is the
best guide to the condition of the clutch and the release mechanism.
Clutch Lubrication
The release bearing should be lubricated at frequent
intervals. See Group 25 of the Business Class® M2
Maintenance Manual for intervals and procedures.
Clutch Wear
CAUTION
The major reason clutches wear out too soon is excessive heat. Clutches are designed to absorb and
dissipate more heat than encountered in typical operation. The temperatures developed in typical operation will not break down the clutch friction surfaces. However, if a clutch is slipped excessively or
required to do the job of a fluid coupling, high temperatures develop quickly and destroy the clutch.
Temperatures generated between the flywheel,
driven discs, and pressure plates can be high
enough to cause the metal to flow and the friction
facing material to char and burn.
CAUTION
Do not allow sustained slippage of the clutch;
this could severely damage the clutch disc, pressure plate, or flywheel. Damage caused by clutch
slippage due to improper break-in is not warrantable.
Slipping and excessive heat are practically nonexistent when a clutch is fully engaged. But during the
moment of engagement, when the clutch is picking
up the load, it generates considerable heat. An incorrectly adjusted or slipping clutch will rapidly generate
sufficient heat to destroy itself.
The most important items that a driver should be
aware of to ensure long service life of the clutch include: starting in the right gear, recognizing clutch
malfunctions, and knowing when to adjust a clutch.
Clutch Adjustments
Some clutches have an internal adjustment. See the
applicable section in Group 25 of the Business
Class® M2 Workshop Manual for clutch adjustment
procedures and specifications.
CAUTION
Operating the vehicle with the clutch incorrectly
adjusted could result in clutch or clutch brake
failure.
Failure to lubricate the release bearing as recommended could result in release bearing damage
and damage to the clutch.
NOTE: The Sachs hydraulic clutch does not require lubrication of the release bearing.
Sachs Hydraulic Clutch
The Sachs hydraulic clutch is a 14.5-inch (365 mm)
push-type clutch that is used with the MercedesBenz medium-duty transmissions, models MBT520
and MBT660.
NOTE: All Mercedes-Benz transmission models
require a hydraulic clutch system. For more information on the Mercedes-Benz transmissions,
see under the heading "Mercedes-Benz Manual
Transmissions."
The clutch hydraulic system consists of three main
components:
• A pedal unit, including the pedal, master cylin-
der and fluid reservoir,
• A slave cylinder at the clutch,
• A hydraulic hose that connects the master and
slave cylinders.
Keep the clutch fluid reservoir full to the MAX mark.
If fluid level falls below the MIN mark, have the hydraulic system checked for leaks at an authorized
Freightliner service facility. Use only DOT 4 brake
fluid to fill the reservoir.
The hydraulic clutch provides smooth, quiet, and reliable clutch actuation with a minimum of maintenance.
Pressure builds up in the master cylinder when the
clutch pedal is pressed. This pressure is transmitted
through the brake fluid in the hose to the slave cylinder, where it acts directly on the clutch release fork.
8.2
Drivetrain
Allison On-Highway
Transmissions
The Allison on-highway transmissions are fully automatic and include the 1000 Series™, 2000 Series™,
and 2400 Series™. Refer to the Allison website for
additional information, www.allisontransmission.com.
Safety Precautions
WARNING
Do not leave the vehicle unattended with the engine running. If you leave the vehicle and the engine is running, the vehicle can move suddenly,
which could result in personal injury or property
damage.
1000 Series
On vehicles with Allison 1000 series transmissions,
do the following steps if you have to leave the cab
with the engine running (for example, when checking
the transmission fluid):
Without Park Position
6.
Chock the rear tires and take any other steps
necessary to keep the vehicle from moving.
2000 Series
On vehicles with Allison 2000 series transmissions,
do the following steps if you have to leave the cab
with the engine running (for example, when checking
the transmission fluid):
Without Auto-Apply Parking Brake
Follow the instructions for vehicles with 1000 series
transmissions, under the heading "Without Park Position."
With Auto-Apply Parking Brake
1.
Bring the vehicle to a complete stop using the
service brake.
2.
Ensure that the engine is at low idle rpm.
3.
Put the transmission in PB (auto-apply parking
brake).
4.
Apply the parking brake (if equipped), and make
sure it is properly engaged.
5.
Chock the rear tires and take any other steps
necessary to keep the vehicle from moving.
1.
Bring the vehicle to a complete stop using the
service brake.
2400 Series
2.
Ensure that the engine is at low idle rpm.
3.
Put the transmission in neutral.
On vehicles with 2400 series transmissions, follow
the instructions for vehicles with 1000 series transmissions.
4.
Apply the parking brake, and make sure it is
properly engaged.
5.
Chock the rear tires and take any other steps
necessary to keep the vehicle from moving.
With Park Position
1.
Bring the vehicle to a complete stop using the
service brake.
2.
Ensure that the engine is at low idle rpm.
3.
Put the transmission in P (park).
4.
Apply the parking brake (if equipped), and make
sure it is properly engaged.
5.
Engage the park range by slowly releasing the
service brake.
8.3
Range Inhibit Indicator, 2000 and
2400 Series
A RANGE INHIBIT indicator is a standard feature of
the 2000 series and 2400 series transmissions. The
RANGE INHIBIT indicator comes on to alert the
driver that transmission operation is being inhibited
and that the range shifts being requested by the
driver may not occur. When certain operating conditions are detected by the TCM (transmission control
module), the controls will lock the transmission in the
current operating range.
Shift inhibits occur under the following conditions:
• Shifts from neutral to reverse or from neutral to
a forward range when the engine is above idle,
greater than 900 rpm.
Drivetrain
• Forward/reverse directional shifts are typically
not permitted if appreciable output shaft speed
is detected.
• When some types of unusual transmission op-
erating conditions are detected by the TCM,
the TCM temporarily limits transmission operation until the vehicle can be driven to a service
location. When this type of situation is detected, the TCM will lock the transmission in a
safe gear range.
• The TCM will prevent shifts from park or neu-
tral to range when auxiliary equipment, such as
a power takeoff unit (PTO), is in operation.
Operating Instructions, On-Highway
Transmissions
Allison automatic transmissions are electronically
controlled. The shift selector provides five or six forward ranges and one reverse range.
P (Park, optional on 1000 and 2400
Series)
Use park when turning the engine on or off, to check
vehicle accessories, to operate the engine in idle for
longer than 5 minutes, and for stationary operation of
the power takeoff, if equipped. This position places
the transmission in neutral and engages the park
pawl of the transmission.
NOTE: This does not apply the parking brake.
PB (Auto-Apply Parking Brake, optional
on 2000 Series)
Do not idle in reverse for more than 5 minutes. Select P (park), PB (auto-apply parking brake), or N
(neutral) when time at idle exceeds 5 minutes.
NOTE: The shift into reverse may not succeed if
a range inhibitor is active. Check for illumination
of the RANGE INHIBIT indicator.
N (Neutral)
The neutral position places the transmission in neutral. This position is used when starting the engine
and for stationary operation.
WARNING
Failure to apply the vehicle parking brakes when
the transmission is in neutral may allow the vehicle to move unexpectedly, possibly causing
property damage or personal injury.
When neutral is selected, the vehicle service brakes,
parking brake, or emergency brake must be applied.
Selecting neutral does not apply vehicle brakes unless an auxiliary system to apply the parking brake is
installed.
WARNING
Do not coast in neutral. Coasting in neutral can
cause an accident, possibly resulting in severe
personal injury or death.
Do not let the vehicle coast in neutral. If the vehicle
is allowed to coast in neutral, the engine brake will
not work and you could lose control of the vehicle.
CAUTION
The auto-apply parking brake places the transmission in neutral and applies the parking brake.
Coasting in neutral can cause severe transmission damage.
R (Reverse)
Reverse is used to back the vehicle. When the selector is in reverse, the reverse warning signal will
sound. Always bring the vehicle to a complete stop
before shifting from a forward range to reverse, or
from reverse to a forward range.
CAUTION
Extended idling in reverse may cause transmission overheating and damage.
D (Drive)
WARNING
When going downhill, use a combination of
downshifting, braking, and other retarding devices to control vehicle speed and the engine’s
rated governed speed. Failure to do so could reduce vehicle braking, possibly causing loss of
vehicle control and resulting in personal injury or
property damage.
8.4
Drivetrain
In the drive position, the transmission will initially go
into first range when drive is selected. As vehicle
speed increases, the transmission will upshift automatically through each available range up to fourth
range or fifth range. As the vehicle slows, the transmission will downshift automatically.
When going downhill, downshift to a lower transmission range to increase engine braking and to help
maintain control. The transmission has a feature to
prevent automatic upshifting above the lower range
selected. However, during downhill operation, the
transmission may upshift to the next higher range, if
the engine is exceeding its governed speed in the
lower range.
CAUTION
Do not idle in drive for more than 5 minutes. Extended idling in drive may cause transmission
overheating and damage. Always select PB (autoapply parking brake) or P (park) if time at idle is
longer than 5 minutes.
NOTE: The shift into drive may not succeed if a
range inhibitor is active. Check for illumination
of the RANGE INHIBIT indicator.
4 and 3 (Fourth and Third Ranges,
optional)
Use the fourth or third range for city traffic and for
braking on steep downgrades.
3 and 2 (Third and Second Ranges,
standard)
Use the third or second range for heavy city traffic
and for braking on steeper downgrades.
1 (First Range)
Use first range when pulling through mud or deep
snow, when maneuvering in tight spaces, or when
driving up or down very steep grades. First range
provides the vehicle with its maximum driving torque
and maximum engine braking effect.
NOTE: To have the transmission select these
ranges automatically, leave the selector lever in
D (drive).
8.5
Allison MD Series
Refer to the Allison website for additional information,
www.allisontransmission.com.
Safety Precautions
WARNING
Do not leave the vehicle unattended with the engine running. If you leave the vehicle and the engine is running, the vehicle can move suddenly,
which could result in personal injury or property
damage.
On vehicles with MD series transmissions, do the
following steps if you have to leave the cab with the
engine running (for example, when checking the
transmission fluid):
1.
Bring the vehicle to a complete stop using the
service brake.
2.
Put the transmission in N (neutral).
3.
Ensure that the engine is at low idle (500 to 800
rpm).
4.
Apply the parking brake and emergency brakes,
and make sure they are properly engaged.
5.
Chock the rear tires and take any other steps
necessary to keep the vehicle from moving.
Operating Instructions, MD Series
The Allison MD transmission is electronically controlled and comes with a push-button shift control
that provides five or six forward ranges and one reverse range. The push-button shift selector has an R
(reverse), an N (neutral), a D (drive), an up arrow, a
down arrow, a mode button, and a digital display.
New shift controls — known as "fourth generation" —
were introduced in mid-2006. They replaced the previous units that are commonly referred to as "WTEC
III". See Fig. 8.1 and Fig. 8.2.
R (Reverse)
Press the R button to select reverse. The digital display will show R when reverse is selected. Always
bring the vehicle to a complete stop and let the engine return to idle before shifting from a forward
range to reverse, or from reverse to a forward range.
Drivetrain
2
NOTE: The shift into reverse may not succeed if
a range inhibitor is active. When reverse is selected, always be sure that R is not flashing.
3
N (Neutral)
1
R
WARNING
4
N
D
f270113
07/27/2006
1. Digital Display
2. Mode Identification
Label
3. Mode Indicator LED
4. Mode Button
Fig. 8.1, WTEC III Push-Button Shift Selector
1
When starting the engine, make sure that the service brakes are applied. Failure to apply the service brakes may result in unexpected vehicle
movement, which could cause severe personal
injury or death. Failure to apply the vehicle parking brakes when the transmission is in neutral
may allow the vehicle to move unexpectedly, possibly causing property damage or personal injury.
Press the N button to select neutral. The digital display will display N when neutral is selected. It is not
necessary to press neutral before starting the vehicle. The ECU (electronic control unit) or TCM
(transmission control module) automatically places
the transmission in neutral at start-up.
WARNING
2
3
Failure to apply the vehicle parking brakes when
the transmission is in neutral may allow the vehicle to move unexpectedly, possibly causing
property damage or personal injury.
4
When neutral is selected, the vehicle service brakes,
parking brake, or emergency brake must be applied.
Selecting neutral does not apply vehicle brakes unless an auxiliary system to apply the parking brake is
installed.
f610804
07/27/2006
1. Digital Display
2. Mode Identification
Label
3. Mode Indicator LED
4. Mode Button
Fig. 8.2, Fourth Generation Push-Button Shift Selector
CAUTION
Extended idling in reverse may cause transmission overheating and damage.
Do not idle in reverse for more than 5 minutes. Select neutral when time at idle exceeds 5 minutes.
WARNING
Do not coast in neutral. Coasting in neutral can
cause an accident, possibly resulting in severe
personal injury or death.
Do not let the vehicle coast in neutral. If the vehicle
is allowed to coast in neutral, the engine brake will
not work and you could lose control of the vehicle.
Always select neutral before turning off the engine.
Neutral is also used during stationary operation of
the power takeoff if your vehicle is equipped with a
PTO.
8.6
Drivetrain
D (Drive)
When the D button is pushed, the highest forward
range will appear in the display. The transmission will
normally go into first range when drive is selected
(except for those units programmed to start in second range). As vehicle speed increases, the transmission will upshift automatically through each range.
As the vehicle slows, the transmission will downshift
automatically.
CAUTION
Do not idle in drive for more than 5 minutes. Extended idling in drive may cause transmission
overheating and damage. Always select neutral if
time at idle is longer than 5 minutes.
NOTE: The shift into drive may not succeed if a
range inhibitor is active. When drive is selected,
always be sure that D is not flashing.
5, 4, 3, and 2 (Fifth, Fourth, Third, and
Second Ranges)
Occasionally, road conditions, load, or traffic conditions will make it desirable to restrict automatic shifting to a lower range. Lower ranges provide greater
braking for going down grades. The lower the range,
the greater the braking effect.
Push the up or down arrows on the push-button shift
selector to select individual forward ranges. The digital display will display your choice of range. When a
lower range is selected, the transmission may not
downshift until the vehicle speed or engine RPM (engine governed speed) is reduced.
WARNING
When going downhill, use a combination of
downshifting, braking, and other retarding devices to control vehicle speed and the engine’s
rated governed speed. Failure to do so could reduce vehicle braking, possibly causing loss of
vehicle control and resulting in personal injury or
property damage.
When going downhill, downshift to a lower transmission range to increase engine braking and to help
maintain control. The transmission has a feature to
prevent automatic upshifting above the lower range
selected. However, during downhill operation, if the
8.7
engine governed speed is exceeded in the lower
range, the transmission may upshift to the next
higher range.
1 (First Range)
Use the first range when pulling through mud or
deep snow, when maneuvering in tight spaces, or
when driving up or down steep grades. First range
provides the vehicle with its maximum driving torque
and maximum engine braking effect. Push the down
arrow until the first range appears on the display.
Up and Down Arrows
When a lower range is desired, after D has been
pressed, press the down arrow until the desired
range is shown on the display. Pressing the down
arrow continuously causes the range position to continue to go down until the button is released or the
lowest range is attained.
When the transmission is in drive and the down
arrow has the transmission in a lower range position,
press the up arrow to shift to a higher selector position. Pressing the up arrow continuously causes the
range position to continue to rise until the button is
released or the highest available position is attained.
Pressing the up or down arrows does not override
the transmission automatic shifting operation. If a
higher or lower position is selected, the transmission
continues shifting through the ranges according to
the vehicle operating characteristics until the highest
or lowest selected position is reached.
Mode Button
The MODE button starts a specialized input or output
function that has been previously programmed into
the ECU or TCM. Pressing the MODE button
changes transmission operation for a specific function.
Mode Indicator LED
When the MODE button is pressed, the mode indicator LED illuminates. A mode identification label, located above the MODE button, identifies the function
associated with a mode change.
Drivetrain
Digital Display
General Information, Straight-Shift
The dual digital display shows both the selected
range (SELECT) and actual range attained (MONITOR). The single digital display shows the selected
range.
Eaton Fuller 5-speed FS models are fully synchronized. They have five forward speeds and one reverse. See Fig. 8.3 for the shift pattern.
Oil Level Sensor
R
Allison MD Series transmissions have an electronic
oil level sensor to read fluid level information. The
fluid level diagnostic will display whether the oil level
is OK, too low, or too high. It will also display a default code and indicate if the preconditions (of receiving the fluid level information) are not met.
IMPORTANT: Maintain the the proper fluid level
at all times. If the fluid level is too low, the converter and clutch do not receive an adequate
supply of fluid. If the level is too high, the transmission may shift erratically or overheat.
To access the oil level display mode, park the vehicle
on a level surface, shift to N (Neutral), apply the
parking brake, and idle the engine. Then simultaneously press both the up and down arrows once.
The oil level will display at the end of a two-minute
countdown.
NOTE: During normal operation, an illuminated
mode indicator LED signifies the specialized
mode operation is in use.
To enter diagnostics mode, first park the vehicle and
apply the parking brake. Then simultaneously press
both the up and down arrows twice.
Eaton® Fuller® Straight-Shift
Transmissions
Refer to the Eaton website for additional information,
www.roadranger.com.
4
N
1
3
5
f261049
05/21/2008
Fig. 8.3, Shift Pattern, 5-Speed FS Models
Eaton Fuller 6-speed FS and FSO models are fully
synchronized. They have six forward speeds and one
reverse. See Fig. 8.4 for the shift pattern.
R
1
Diagnostic Codes
Diagnostic codes are numerical indications relating to
a malfunction in transmission operation. These codes
are logged in the TCM/ECU memory. The most severe or most recent code is listed first. A maximum of
five codes (numbered d1-d5) may be listed in
memory at one time. If the mode indicator LED is
illuminated, the displayed code is active. If it is not
illuminated, the displayed code is not active.
2
3
5
4
6
N
2
05/21/2008
f261048
Fig. 8.4, Shift Pattern, 6-Speed FS and FSO Models
Eaton Fuller 7-speed T models are not synchronized.
They have seven forward speeds and one reverse.
See Fig. 8.5 for the shift pattern.
These transmissions are designed for use with onhighway, fuel economy engines where a minimum of
shifting is desired and less gear reduction is acceptable.
Operation, Straight-Shift
1.
Always use first gear when starting to move the
vehicle forward.
IMPORTANT: Do not rest your foot on the clutch
pedal while driving. This causes partial clutch
8.8
Drivetrain
4.2
R
4
2
6
On synchronized models, disengage the
clutch and move the shift lever to the next
lower gear.
7
On unsynchronized models, disengage the
clutch and move the shift lever to neutral.
Engage the clutch again. With the shift
lever in neutral, disengage the clutch and
move the shift lever to the next lowest
gear.
N
1
3
5
f261051
05/21/2008
Fig. 8.5, Shift Pattern, 7-Speed T Models
disengagement which could cause premature
clutch wear.
2.
Use the sequence described above to
shift progressively down through each
successive lower gear, as driving conditions require.
On unsynchronized models, press the clutch
pedal to the floor to contact the clutch brake only
when engaging the first or reverse gears.
Refer to the Eaton website for additional information,
www.roadranger.com.
To upshift, do the following steps:
3.1
Accelerate to engine governed speed.
3.2
On synchronized models, disengage the
clutch and move the shift lever to second
gear.
3.3
3.4
Engage the clutch and note the drop in
engine rpm before accelerating up to engine governed speed again.
Continue upshifting using the same sequence described in the previous step.
Follow the pattern on the shift lever.
To downshift, do the following steps:
4.1
8.9
4.4
Eaton Fuller Range-Shift
Transmissions
On unsynchronized models, disengage the
clutch and move the shift lever to neutral.
Engage the clutch again. With the shift
lever in neutral, disengage the clutch and
move the shift lever to second gear.
4.
Engage the clutch smoothly.
On synchronized models, press the clutch pedal
to the floor when shifting gears. Double-clutching
is unnecessary.
NOTE: If the vehicle is moving when shifting,
press the clutch pedal just far enough to disengage the clutch. Pressing it to the floor will engage the clutch brake, if so equipped, causing
premature clutch brake wear.
3.
4.3
Wait until the engine speed drops to the
rpm noted immediately after the upshift.
General Information, Range-Shift
Eaton Fuller 9-Speed Models
Eaton Fuller 9-speed range-shift models are not synchronized. They have nine forward speeds and two
reverse speeds. The shift lever controls five forward
gears and one reverse gear in the transmission front
section, and the range lever controls a LO and HI
range in the two-speed auxiliary section. The first
position in the front section is used only as a starting
gear. The other four ratios are used once in LO
range and once again in HI range. See Fig. 8.6 for
the shift patterns.
After shifting out of the first gear position, use the
Roadranger® "repeat H" shift pattern. Select both LO
range and HI range with the range lever (range
knob). It is used once during the upshift sequence
and once during the downshift sequence.
Always preselect the range shift. After preselection,
the transmission will automatically make the synchronizer range shift as the shift lever passes through
neutral.
Eaton Fuller 10-Speed Models
Eaton Fuller 10-speed range-shift models are not
synchronized. They have ten forward speeds and
Drivetrain
HI
7
3
5
1
LO
9-Speed
Direct or
Overdrive
11/23/99
Move the range lever up for HI range, down for LO
range.
R
7
2
9
4
A
N
6
1
8
3
10
5
2
4
R
1
3
2
4
R
2
1
3
R
5
7
6
8
f260323
4
R
2
5
1
3
f260329
4
5
f260324
R
6
7
8
f260329
9
10
f260330
When downshifting, the driver preselects the range
lever for LO range and the range shift occurs automatically during the shift lever movement to the next
gear position.
Eaton Fuller Deep-Reduction Models
Eaton Fuller deep-reduction models are not synchronized. They have a five-speed front section and a
two-speed auxiliary section which has an extra deep
reduction gear. The LO gear in the front section is
used only as a starting gear. The other four ratios
are used once in LOW RANGE and once in HIGH
RANGE giving eight highway ratios. LO-LO is selected by the DEEP REDUCTION lever on the dashboard. See Fig. 8.8 for the shift pattern.
R R
R
B
f261053
12/15/1999
A. HI Range
3
Table 8.1, Eaton Fuller Shift Progressions
two reverse speeds. The shift lever controls five forward gears and one reverse gear in the transmission
front section, and the range lever controls a LO and
HI range in the two-speed auxiliary section. The five
forward gears selected in LO range are used again
in HI range to provide the 10 progressive forward
gears. See Fig. 8.7 for the shift patterns. See
Table 8.1 for the shift progressions.
HI
10-Speed
Direct or
Overdrive
B. LO Range
Fig. 8.6, Shift Pattern, 9-Speed Models
LO
LOW
1
f260322
f261047
A. HI Range
R
B
8
4
6
2
LO
Model
A
N
Eaton Fuller Shift Progressions
LO Range
HI Range
Off-Highway On-Highway
7
3
N
B. LO Range
LO
Fig. 8.7, Shift Pattern, 10-Speed Models
LO−LO
Once the highest shift lever position (fifth gear) is
reached in LO range, the driver preselects the range
shift lever for HI range. The range shift occurs automatically as the shift lever is moved from fifth gear
position to the sixth gear position.
5
1
6
2
8
4
f260123a
03/12/96
Fig. 8.8, Shift Pattern, Deep Reduction
Operation, Range-Shift
1.
When operating off-highway or under adverse
conditions, always use low gear when starting to
move the vehicle.
8.10
Drivetrain
When operating on-highway, with no load or
under ideal conditions, use first gear when starting to move the vehicle.
5.
While in the top gear of the low-range shift pattern and ready for the next upshift, flip the range
preselection lever up into high range. Doubleclutch through neutral and shift into the bottom
gear in high range. As the shift lever passes
through neutral, the transmission will automatically shift from low range to high range.
6.
With the transmission in high range, shift progressively up through each of the high range
gears, double-clutching between shifts.
For all conditions, use the highest gear that is
still low enough to start the vehicle moving with
the engine idling and without excessively slipping
the clutch.
2.
Use the clutch brake to stop gear rotation when
shifting into low (or first) or reverse when the vehicle is stationary. The clutch brake is applied by
pressing the clutch pedal all the way to the floor.
Downshifting
For normal upshifts and downshifts, only a partial
disengagement of the clutch is necessary to
break engine torque.
1.
With the transmission in high range, shift progressively down to the bottom gear in high
range, double-clutching between shifts.
3.
Do not make range shifts with the vehicle moving
in reverse gear.
2.
4.
Never attempt to move the range preselection
lever with the gear shift lever in neutral while the
vehicle is moving. Preselection with the range
preselection lever must be made prior to moving
the shift lever out of gear into neutral.
5.
Do not shift from high range to low range at high
vehicle speeds.
When in the bottom gear of the high-range shift
pattern and ready for the next downshift, push
the range preselection lever down into low range.
Double-clutch through neutral and shift into the
top gear of the low-range shift pattern. As the
shift lever passes through neutral, the transmission will automatically shift from high range to
low range.
3.
With the transmission in low range, downshift
through the low range gears as conditions require.
6.
Use double-clutching between all upshifts and
downshifts.
7.
After your shifting ability improves, you may want
to skip some of the ratios. This may be done
only when operating conditions such as load,
grade, and road speed permit.
Upshifting
Never use the clutch brake when downshifting or
as a brake to slow the vehicle.
Operation, Deep-Reduction Models
Upshifting
1.
Position the gear shift lever in neutral. See
Fig. 8.8 for the shift pattern. Start the engine,
and bring the air system pressure up to 95 to
125 psi (655 to 862 kPa).
Position the range preselection lever down into
low range.
2.
Position the range preselection lever down, into
low range.
3.
Press the clutch pedal to the floor. Shift into low
or first gear, then engage the clutch with the engine at or near idle speed to start the vehicle
moving. Accelerate to 80 percent of engine governed speed.
NOTE: If conditions are difficult, start out in LOLO. Move the DEEP REDUCTION lever on the
dashboard to the IN position. Otherwise start
out in LO with the DEEP REDUCTION lever in
the OUT position.
4.
Shift progressively up from low or 1st gear to the
top gear in low range, double-clutching between
shifts and accelerating to 80 percent of engine
governed speed.
1.
Position the gear shift lever in neutral. Start the
engine and bring the air system pressure up to
100 to 120 psi (689 to 827 kPa).
2.
8.11
Drivetrain
3.
Depress the clutch pedal to the floor. Shift into
LO gear; then, engage the clutch, with the engine at or near idle rpm to start the vehicle moving. The vehicle will start in LO or LO-LO depending on the DEEP REDUCTION lever
position.
4.
To upshift if in LO-LO, move the DEEP REDUCTION lever to the OUT position and immediately
release the accelerator, depress the clutch pedal
once to break torque, and reengage the clutch.
The auxiliary section will shift from LO-LO to LO
when the gears reach the same speed.
5.
6.
Shift progressively upward from LO through 1st,
2nd, 3rd, and 4th gears while the range preselection lever is in LO. Always double-clutch between gears.
When in 4th gear and ready for the next upshift,
pull up the range preselection lever and move
the shift lever, double-clutching, to the 5th gear
position. As the shift lever passes through neutral, the auxiliary section will automatically shift
from low to high range.
CAUTION
Never move the shift lever into the LO gear position after high range preselection or anytime the
auxiliary section is in high range. Transmission
damage could result.
7.
Continue upshifting from 5th gear through 8th
gear, always double-clutching between gears.
Downshifting
1.
While in high range, move the gear shift lever
from 8th gear through 5th gear as conditions require, always double-clutching between gears.
2.
When in 5th gear and ready for the next downshift, push down the range preselection lever and
move the shift lever to the 4th gear position,
being sure to double-clutch. As the shift lever
passes through neutral, the auxiliary section will
automatically shift from high to low range.
3.
4.
While in the low range, continue downshifting
from 4th through LO as conditions require, always double-clutching between gears.
Do not downshift into LO-LO from LO unless operating conditions make it necessary. If it is necessary, make sure that the shift lever is in the LO
gear position and the auxiliary section is in the
low range. Then, move the DEEP REDUCTION
lever on the dashboard to the IN position. Immediately release the accelerator, depress the
clutch pedal once to break torque, engage the
clutch, and accelerate. The auxiliary section will
automatically shift from LO to LO-LO when the
gears reach the same speed.
CAUTION
Never use the clutch brake when downshifting, or
as a brake to slow the vehicle. This will cause
premature clutch brake wear.
Eaton Fuller AutoShift™
Refer to the Eaton website for additional information,
www.roadranger.com.
IMPORTANT: Before starting the vehicle, always
do the following:
• Be seated in the driver’s seat.
• Place the transmission in neutral.
• Set the parking brakes.
• Press the clutch pedal (if equipped) down to
the floor.
The AutoShift ASW is an automated 6-speed Eaton
Fuller transmission. No clutch is necessary to operate the vehicle.
The AutoShift AS2 is a partially automated 10-speed
Eaton Fuller transmission. The driver must use the
clutch and put the transmission in neutral to start and
stop the vehicle. A push-button shift selector
(Fig. 8.9) is used with AutoShift AS2 and ASW
transmissions.
IMPORTANT: If you have to leave the cab with
the engine running:
• Place the transmission in neutral.
• Set the parking brakes.
• Chock the tires.
Push-Button Shift Selector
Gear information is presented to the driver on the
push-button shift selector, usually mounted on the
8.12
Drivetrain
• To select low gear, press the LOW button.
When low is engaged, the telltale LED will light
up next to the LOW button.
10
1
9
2
3
• To change gears manually, press the MANUAL
button. When the manual mode is engaged,
the telltale LED will light up next to the
MANUAL button.
• Use the shift buttons (upshift/downshift) to
change the current starting gear selection in R,
D, and LOW. In MANUAL, the shift buttons can
be used to select gears.
• In automatic mode, the number of the forward
8
4
5
7
6
11/14/2001
1.
2.
3.
4.
5.
6.
Not Used
R (reverse)
N (neutral)
D (drive)
MANUAL Mode
Low Gear Hold
• If the SERVICE indicator illuminates, take the
vehicle as soon as possible to an authorized
Freightliner service facility.
• The mode button is reserved for future use.
IMPORTANT: To prevent engine overspeed, the
transmission software will override both
MANUAL and LOW if necessary. The system
will not respond to gear selection requests that
will either overspeed or excessively lug the
engine.
f261145
7. Upshift/Downshift
Arrows
8. SERVICE Light
9. Mode Indicator
10. Mode Button
Fig. 8.9, Eaton Push-Button Shift Selector
right-hand control panel. On this display, the information is presented as follows:
• To select neutral, press the N button. When
neutral is engaged, the telltale LED will light up
next to the N button.
• To select reverse, press the R button. When
reverse is engaged, the telltale LED will light
up next to the R button.
• To select drive, press the D button. When drive
is engaged, the telltale LED will light up next to
the D button.
8.13
gear currently engaged appears continually on
the mode indicator when in drive. In MANUAL,
the last gear selected appears on the mode
indicator.
Automatic Mode
The AutoShift AS2 transmission is normally operated
in an automatic mode. To select MANUAL mode,
press the MANUAL button on the push-button shift
selector.
When the transmission is in automatic mode, the
transmission automatically selects and engages the
gears, although the transmission will respond to upshift and downshift requests as though in manual
mode. See the instructions for shifting under heading
"Manual Mode" below.
Manual Mode
When the transmission is in manual mode, the driver
must select the appropriate gear, using the shift buttons on the push-button shift selector.
Drivetrain
To upshift in MANUAL, press the upshift button (up
arrow), and release. The number of the gear will appear on the mode indicator. If the requested gear is
available, the transmission will shift up.
NOTE: Neutral is always available during vehicle operation. When in neutral, requests to
upshift or to downshift are ignored.
D (Drive)
CAUTION
Do not attempt to upshift until the vehicle has
reached a sufficient speed. The clutch absorbs
the speed difference by generating heat, which
causes the clutch to wear out too soon.
Many drivers upshift into the next gear or even skipshift into a higher gear before the vehicle has
reached the correct speed. This type of shifting is
almost as bad as starting off in a gear that is too
high. When the engine speed (rpm) and the vehicle
speed (mph or km/h) are too far apart, the clutch
must absorb the difference in speed by generating
heat.
To downshift in MANUAL, press the downshift button
(down arrow), and release. The number of the gear
will appear on the mode indicator. If the requested
gear is available, the transmission will shift down.
If any requested gear is not available, an audible
warning will sound and the digital display will indicate
that the gear is not available.
Selecting Gears
R (Reverse)
Reverse (R) is used to back the vehicle. Make sure
the vehicle comes to a full stop and the clutch pedal
has been pressed before shifting into reverse.
Drive (D) is used for normal highway driving. In drive,
the transmission shifts into the proper gear for starting, and then automatically selects additional gears
as needed, in a range between the starting gear and
the highest gear.
To select drive, press the clutch pedal to the floor.
Then press the D button. Slowly release the clutch
pedal and drive the vehicle.
To start up in a gear other than the normal starting
gear, push the upshift arrow with D selected, and
while the vehicle is stopped.
IMPORTANT: AutoShift will not start up in any
gear higher than third gear.
The number of the gear selected will flash on the
auxiliary display until the driver presses the clutch
pedal. This gear will be stored in memory as the default starting gear until a different starting gear is selected by the driver, or until the engine is shut down.
NOTE: The transmission may be programmed
so that it is not possible to select a starting gear
other than the preprogrammed starting gear.
L (Low)
N (Neutral)
LOW is used to hold the transmission in low gear
when descending steep hills. If LOW is selected
when the vehicle is stopped, the transmission remains in low gear until drive is selected. If LOW is
selected while the vehicle is moving, the transmission downshifts at a higher engine speed than normal, in order to maximize the engine braking effect.
Neutral (N) is used for starting, parking, or any stationary operation. No gear is selected. The transmission must be in neutral to start the engine.
To select LOW, press the clutch pedal to the floor.
Then press the LOW button. Slowly release the
clutch pedal and drive the vehicle.
IMPORTANT: If the vehicle starts up in any gear
but neutral, bring the vehicle to an authorized
Freightliner service facility as soon as possible.
IMPORTANT: Before parking the vehicle, always
do the following:
To select reverse, press the clutch pedal to the floor.
Then press the R button.
To select neutral, press the clutch pedal to the floor.
Then press the N button. Set the parking brakes and
slowly release the clutch pedal.
• Place the transmission in neutral.
• Set the parking brakes.
• Chock the tires, if parking on an incline.
8.14
Drivetrain
Freightliner SmartShift Shift
Control
5
The SmartShift transmission control is an electronic
transmission control device. It is installed with the
following transmissions:
1
• Eaton Fuller UltraShift™
SmartShift accepts driver requests for transmission
functions and transmits them through hard wiring to
the transmission control unit (TCU). SmartShift is a
true shift-by-wire system.
SmartShift offers two main advantages over conventional transmission control devices. Without a floormounted shift control, usable cab space is increased.
The SmartShift control mounts to the right-hand side
of the steering column and is operated by the fingers
of the driver’s right hand, allowing both hands to remain on the steering wheel.
A two-position slide switch (Fig. 8.10) is mounted on
the body of the control lever just before the paddle
widens out. The slide switch allows the driver to
choose automatic (AUTO) or manual (MAN) mode.
In AUTO mode, gears shift automatically, without
driver interaction. Manual gearshifts are accomplished by a momentary pull or push on the control in
the plane perpendicular to the steering wheel. Pull
upward (toward you) on the control to upshift and
push downward (away from you) to downshift. The
control is spring-loaded and returns to mid-position
when released after an upshift or downshift.
For Eaton Fuller UltraShift (Fig. 8.10), a four-position
(R, N, D, L) selector switch is located at the end of
the lever. For the Mercedes-Benz AGS (Fig. 8.11), a
three-position (R, N, D) selector switch is located at
the end of the lever.
Embedded in the selector switch is a small neutral
lock button to prevent accidental shifts into gear from
neutral. Any time you shift through N, press down on
the neutral lock button to move the switch from neutral (N) to another gear, such as drive (D), low (L), or
reverse (R). When shifting to N, it is not necessary to
press the neutral lock button.
8.15
8
9
2
10
11
• Mercedes-Benz Automated Gear Shift (AGS)
It replaces the typical floor-mounted shift lever or
dash-mounted push button control.
7
4
3
General Information, SmartShift
6
01/24/2003
12
f270120
To upshift manually, pull the lever up (towards you). To
downshift manually, push the lever down (away from
you).
1. SmartShift Control Lever
2. Slide Switch (forward driving mode switch)
3. MAN Mode (of slide switch)
4. AUTO Mode (of slide switch)
5. Upshift Direction
6. Reverse Position (of selector switch)
7. Selector Switch
8. Neutral Lock Button
9. Neutral Position (of selector switch)
10. Drive Position (of selector switch)
11. Low Position (of selector switch)
12. Downshift Direction
Fig. 8.10, SmartShift Control (with Eaton Fuller
UltraShift)
Eaton Fuller UltraShift
The Eaton® Fuller® UltraShift™ transmission uses the
four-position SmartShift control lever on the steering
column to change gears, combined with a gear indicator on the right-hand control panel as shown in
Fig. 8.12. All forward shifts can be made either
manually or automatically, at the driver’s choice. No
clutch pedal is required to operate the vehicle.
General Information, UltraShift ASW
UltraShift ASW is a six-speed medium-duty fully automated transmission used on the M106 only. Sixspeed UltraShift ASW uses a "wet" clutch system in
which the drive and driven discs rotate in a bath of
transmission fluid (Dexron III).
General Information, UltraShift DM
UltraShift DM is a ten-speed heavy-duty fullyautomated transmission used on the M112 only. Tenspeed UltraShift DM uses a dry clutch system which
Drivetrain
5
6
is offered only on this automated transmission system.
7
4
3
8
Operation, UltraShift
Power Up
1
9
2
10
11
11/11/2002
f270080
To upshift manually, pull the lever up (towards you). To
downshift manually, push the lever down (away from
you).
1. SmartShift Control Lever
2. Slide Switch
3. MAN Position (of slide switch)
4. AUTO Position (of slide switch)
5. Upshift Direction
6. Reverse Position (of selector switch)
7. Selector Switch
8. Neutral Lock Button
9. Neutral Position (of selector switch)
10. Drive Position (of selector switch)
11. Downshift Direction
NOTE: These operating instructions apply
equally to six-speed UltraShift ASW and tenspeed UltraShift DM, with the exceptions explained below.
1.
With the parking brake set, select neutral (N) by
moving the selector switch to the N position.
2.
With the transmission in neutral, turn on the ignition switch. The "CHECK TRANS" and "TRANS
TEMP" telltale lights come on and go out again
(bulb check). See Fig. 8.13.
1
2
CHECK
TRANS
TRANS
TEMP
BRAKE
Fig. 8.11, SmartShift Control (with Mercedes-Benz AGS)
1
10/27/2003
f610677
1. "CHECK TRANS" Light
2. "TRANS TEMP" Light
2
Fig. 8.13, Telltale Lights, UltraShift Transmission
10/13/2003
3.
After the ignition is turned on, the current gear
indicator shows the dot display, arranged in a
square pattern. All dots in the pattern should light
up, without gaps or spaces. See Fig. 8.14.
4.
Wait for the current gear indicator to show a solid
"N." When the "N" is solid, rather than flashing,
the UltraShift transmission control unit (TCU) is
powered up. Apply the service brake and start
the engine.
5.
Select drive (D) by pressing in the neutral lock
button and moving the selector switch downward
to the position below neutral. Release the parking brake. The gear is displayed on the current
gear indicator.
f270079
To know what gear the transmission is in, look at the
current gear indicator.
1. Gear Indicator
2. SmartShift Control
Fig. 8.12, Shift Controls and Indicators, UltraShift
Transmissions
8.16
Drivetrain
On steep hills, set the parking brake.
When parking, chock the tires, front and/or
rear. Never hold a hill with the throttle
pedal. This will cause the clutch to overheat.
Power Down
f610678
10/13/2003
Fig. 8.14, Power-Up Dot Display
NOTE: When D is selected, the transmission
controller starts up in second gear. On both sixspeed Ultrashift ASW and ten-speed Ultrashift
DM, the driver can select to start up in first. No
other start gear is available.
6.
On a level grade, release the service brake and
press down on the throttle pedal to allow the vehicle to move forward.
1.
Apply the service brake.
2.
Select neutral (N) by moving the selector switch
to the N position. When the "N" on the gear indicator is solid, rather than flashing, the UltraShift
TCU is ready to power down. See Fig. 8.13.
3.
With the transmission in neutral, set the parking
brake.
4.
Turn off the ignition key and shut down the engine.
Automatic and Manual Modes
The SmartShift control has a slide switch located on
the body of the control lever just before the paddle
widens out. See Fig. 8.15. The slide switch controls
the forward driving mode, automatic or manual.
WARNING
When starting or stopping on hills and grades,
use extra care to prevent the vehicle from rolling
back. A rollback accident could cause death, serious personal injury, or property damage.
7.
7.1
8.17
3
To start from a full stop on a hill or grade,
quickly move your foot from the brake
pedal and press firmly on the throttle
pedal.
On steep hills, set the parking brake and
release it only when there is enough engine power to prevent rollback.
7.2
2
1
Prevent the vehicle from rolling backward when
stopped on a hill or grade, or when the vehicle is
starting from a stop on a hill or grade.
To stop on a hill or grade, press and hold
the brake pedal to keep the vehicle from
moving.
01/21/2004
f270079c
1. Slide Switch (controls forward driving mode)
2. Selector Switch (controls gear selection)
3. Neutral Lock Button (prevents accidental shift into
gear)
Fig. 8.15, Switches, Ultrashift Transmission
Drivetrain
To change mode at any time, move the slide switch
in the desired direction. This allows the driver to respond to a wide range of driving conditions, such as
blind corners, tight curves, and steep hills.
IMPORTANT: Whatever the mode, it is always
possible to shift manually by moving the lever
up or down as needed. When the engine speed
is within 75 revolutions per minute (rpm) of the
load-based shift point for an automatic shift, the
UltraShift TCU will advance the shift.
In either mode, the gear indicator displays the current gear. See Fig. 8.16.
shift if the engine speed is within 75 rpm of the loadbased shift point for that gear.
If the driver presses down on the throttle pedal after
a manual downshift in automatic mode, the transmission will upshift again if the UltraShift TCU requires
it.
Manual Mode (MAN)
In manual drive mode (MAN), upshifts and downshifts are made by the driver:
• To shift up, pull the lever up (towards you).
• To shift down, push the lever down (away from
you).
The system will hold the current gear until the driver
requests a shift. In downhill situations in particular,
the driver must be alert to vehicle speed by downshifting and/or using the service brake.
A shift request will still be refused if the selected gear
would cause engine overspeed or excessive lugging.
Selecting Gears
Reverse
f610680
10/13/2003
NOTE: The gear indicator displays the current gear. In
this example, it displays first gear.
Fig. 8.16, Current Gear Display
At the start of a shift, the current gear continues to
display until the transmission has been pulled into
neutral. At this point, as the transmission is synchronizing for the new (target) gear, the gear indicator
flashes the number of the new gear.
Reverse (R) is at the upper end of the four-position
selector switch located at the end of the SmartShift
control lever. To select R, press in the neutral lock
button and move the selector switch upward to the
position above neutral.
Six-speed UltraShift ASW has one reverse gear.
When reverse is selected, the letter "R" displays on
the gear indicator. See Fig. 8.17.
When the shift is complete, the new gear displays
solid, without flashing.
Automatic Mode (AUTO)
In automatic drive mode (AUTO), upshifts and downshifts are made by the transmission without driver
intervention. Press in the neutral lock button, move
the selector switch to drive (D), and press down on
the throttle pedal. The transmission will shift automatically.
If driving conditions require, it is still possible to request a manual shift. The transmission will make the
f610681
10/14/2003
Fig. 8.17, Reverse Gear Display
8.18
Drivetrain
Ten-speed UltraShift DM has two reverse gears, reverse low and reverse high. To shift manually between them, use the shift lever as described for MAN
mode. There is no AUTO mode for reverse.
When reverse low is selected, the letter "R" displays
on the current gear indicator. When reverse high is
selected, the letter "H" displays on the current gear
indicator.
IMPORTANT: Under normal conditions, do not
select reverse with the vehicle moving forward.
The vehicle must be moving at less than two miles
per hour (3 km/h) before selecting reverse. If reverse
is selected when the vehicle is moving faster, an audible alert will sound and continue sounding at threesecond intervals until the control lever is returned to
the D position. When the vehicle is moving at the
proper speed, reverse can be engaged.
On ten-speed UltraShift DM only, if necessary to rock
the vehicle, use the selector switch to shift back and
forth at low speed between reverse and drive.
Neutral
IMPORTANT: Always start the engine with the
transmission in neutral, the parking brake set,
and the service brakes applied.
Neutral (N) is directly below R on the four-position
selector switch located at the end of the SmartShift
control lever. To select N, move the selector switch to
the position below R. When neutral is selected, the
letter "N" displays on the gear indicator. See
Fig. 8.18.
WARNING
Do not coast in neutral. Coasting in neutral can
cause an accident, possibly resulting in severe
personal injury or death.
Neutral is always available during operation, whatever the vehicle speed. When in neutral, requests to
upshift or downshift are ignored. If the selector switch
is moved from neutral to drive while the vehicle is
moving, the transmission will shift into a gear within
the engine’s operating speed range.
When shifting from neutral, always press on the
brake pedal. If the brake pedal is not pressed, the
transmission will not shift, the current gear display
will flash "N," and an audible alert will sound.
NOTE: To reset the transmission, return the selector switch on the SmartShift lever to N and
attempt the shift again, this time with the brake
pedal pressed.
Before shutting down the engine, return the selector
switch to "N." When the ignition is turned off, the
transmission will reset to neutral in a few minutes
regardless of the position of the shift lever.
Drive
Drive (D) is directly below N on the four-position selector switch located at the end of the SmartShift
control lever. To select D, press in the neutral lock
button and move the selector switch to the position
below N. When drive is selected, the number of the
currently selected forward gear (1 through 6 on sixspeed UltraShift ASW; 1 through 10 on ten-speed
UltraShift DM) displays on the gear indicator. See
Fig. 8.16.
When in drive, requests to upshift or downshift are
enabled. Either manual or automatic mode can be
selected on the slide switch.
Two starting gears are available, first and second.
The default starting gear is second, but first can be
selected by the driver, if desired. To change the starting gear, press the brake pedal and select D with the
vehicle stopped. The current gear indicator will display the starting gear. Move the shift lever up or
down until the desired starting gear is displayed.
f610679
10/13/2003
Fig. 8.18, Neutral Display
8.19
The UltraShift TCU adapts to the working conditions
of each vehicle and its driver. After power-up or a
load change, it needs to learn the new conditions.
Drivetrain
While learning, it may hold a gear too long before
upshifting. Start the upshift manually. It may take
three or four shifts before UltraShift succeeds in
learning the new load-based shift points, but after
that it will handle the shifting automatically.
Low
Low (L) is located at the lower end of the fourposition selector switch located at the end of the
SmartShift control lever. To select L, press in the
neutral lock button and move the selector switch to
the position below D.
When in low, the current gear is maintained. Requests to upshift are not enabled.
IMPORTANT: If the engine is approaching overspeed, the UltraShift TCU will override the current gear setting and upshift to prevent engine
damage.
To enhance engine braking, downshifts are performed at higher rpm than normal.
If L is selected from neutral while stopped, the vehicle starts up in first gear and stays there until the
engine approaches overspeed.
Upshifting
To request an upshift with the transmission in drive,
pull the control lever up (towards you). If the gear is
available, the transmission upshifts and the new gear
displays on the gear indicator. No skip shifts are
available while upshifting.
No upshifts are available in low, except to prevent
engine overspeed.
If the transmission does not upshift quickly enough
after power-up or a load change, begin the shift
manually. The UltraShift TCU will learn the new loadbased shift conditions after three or four shifts.
If the gear requested is unavailable, a tone will
sound. An unavailable request to upshift is not stored
in memory. The upshift must be requested again.
Downshifting
NOTE: The driver can manually downshift at
any time, even when the slide switch is set to
AUTO mode.
If the gear is available, the transmission downshifts
and the new gear displays on the gear indicator. Skip
shifts are available while downshifting.
For best engine braking, select low while moving. In
low, downshifts are performed at higher rpm than in
drive.
IMPORTANT: If the engine is approaching overspeed, the UltraShift TCU will override the current gear setting and upshift to prevent engine
damage.
If the gear requested is unavailable, a tone will
sound. An unavailable request to downshift is not
stored in memory. The downshift must be requested
again.
When coasting to a stop, the UltraShift TCU may not
finish the downshift until the driver presses down on
the throttle pedal again.
IMPORTANT: A downshift request can never
result in a shift into neutral, even if the vehicle is
in the drive position in the lowest possible gear.
Before starting down a hill, slow down. Downshift to
a speed that you can control without hard pressure
on the service brakes.
Before entering a curve, slow down to a safe speed.
Downshift if necessary. This lets you use some
power through the curve to help the vehicle be more
stable on the turn. It also allows you to regain speed
faster as you come out of the curve.
UltraShift Diagnostics
Clutch Calibration
NOTE: Clutch calibration only occurs on sixspeed UltraShift ASW.
The UltraShift TCU automatically adjusts for clutch
wear. The calibration takes place whenever the following conditions are met:
• The engine is at normal operating temperature
• The vehicle is stopped
• The engine is at idle speed
• The selector switch on the control lever is in
neutral
To request a downshift with the transmission in drive
or low, push the control lever down (away from you).
8.20
Drivetrain
Calibration may take up to two minutes to complete.
The engine may slow and return to normal idle several times during calibration.
To stop calibration at any time, select one of the
drive positions on the selector switch (R, D, or L).
Clutch Protection Fault
Excessive clutch slippage creates heat and reduces
the life of the clutch. These are some conditions
which lead to clutch abuse:
• Using the throttle to hold the vehicle on a
grade
• Starting the vehicle in too high a gear
• Overloading the vehicle
• Using high idle with the vehicle in gear
The UltraShift TCU is programmed to prevent clutch
abuse. When the clutch overheats, the following
alerts take place:
• The "TRANS TEMP" light comes on
• The gear indicator displays "CA"
• A warning tone sounds at one second intervals
The alerts continue until the clutch cools, the throttle
is released, or the clutch is fully engaged.
4.
Wait at least two minutes with the engine shut
down.
5.
Restart the engine.
If the problem continues, contact an authorized
Freightliner or Eaton service facility.
Locked In Gear
If the transmission becomes locked in gear, a dash
(–) will appear on the gear indicator when the vehicle
is restarted during the reset procedure.
NOTE: If the transmission becomes locked in
gear while the vehicle is moving, increased
braking effort may be required to stop the vehicle.
If the current gear indicator displays a dash during
power-up with the selector switch in neutral, do the
following steps:
1.
Make sure the parking brake is set.
2.
Turn off the ignition and wait at least two minutes.
3.
Apply the service brakes.
4.
With the service brakes applied, release the
parking brake.
5.
Make sure the selector switch is in neutral and
turn on the ignition key. Do not attempt to start
the engine at this time.
6.
If necessary to get the transmission to shift into
neutral, release the pressure on the brake pedal
slightly.
Once the UltraShift TCU reaches neutral, a solid
"N" will appear on the current gear indicator and
the vehicle will start. Make sure the service
brakes are applied and the parking brake is set.
System Problem
In the event of a problem, do the following steps:
1.
Note the driving conditions at the time the problem occurred.
2.
Record the status of the transmission at the time
of the problem (AUTO or MAN mode, gear setting R, N, D, or L, current gear, engine speed,
etc.)
7.
3.
Reset the system, using the procedure below.
If the gear indicator continues to display a dash, contact an authorized Freightliner or Eaton service facility.
Reset Procedure
Transmission operation can sometimes be restored
by doing the following reset procedure:
1.
Stop the vehicle when it is safe to do so.
2.
Place the selector switch in neutral and turn off
the ignition.
3.
Check all harness connectors as described in
Chapter 11.
8.21
Drivetrain
Mercedes-Benz Manual
Transmissions
When shifting, always press the clutch pedal all the
way down. Do not force the gear lever.
Before shifting into reverse, be sure the engine is
idling and the vehicle is not moving.
CAUTION
Operating a manual transmission with the fluid
level higher or lower than recommended can result in transmission damage.
Mercedes-Benz transmissions use a simple 6-speed
gear pattern as shown in Fig. 8.19.
1
3
5
N
R
2
4
05/03/2001
6
f261098
Fig. 8.19, Shift Pattern, M-B Transmissions
Always use first gear when starting to move the vehicle forward.
IMPORTANT: Do not rest your foot on the clutch
pedal while driving. This causes partial clutch
disengagement which could cause premature
clutch wear.
While traveling, check the tachometer regularly to be
sure the engine speed is within the most economical
range (1400 to 2000 rpm).
On level roads, drive in the highest usable gear,
keeping engine speed down.
CAUTION
Do not rest your hand on the gear shift lever
while driving. This can cause synchronizer damage.
When approaching an uphill grade, shift down ahead
of time to prevent loss of engine rpm. When approaching a downhill grade, shift down ahead of time
to prevent runaway speed. For information about
shift points and "progressive shifting," see Chapter 7.
CAUTION
If the transmission locks up while driving, making further shifting impossible, continue driving
in the gear already selected to reach service assistance, as circumstances allow. Or, safely park
the vehicle off the roadway and contact your
nearest Freightliner dealer or other qualified service provider for roadside assistance. To prevent
further transmission damage, do not move the
vehicle from a standing start unless this can be
accomplished safely, taking into account the gear
that is engaged and the load on the vehicle.
Mercedes-Benz Automated
Transmissions
General Information, AGS
The AGS Automated Gear Shift is a fully automated
6-speed medium-duty transmission. The clutch is activated by a hydraulic system that is integral to the
transmission. No clutch pedal is needed to operate
the vehicle.
AGS transmissions use the SmartShift control lever
on the steering column to select gears. A manual
shift is possible at any time by moving the SmartShift
lever up or down as needed.
The transmission control unit (TCU) can direct all
forward shifts in response to driving conditions and
the driver’s pressure on the brake and throttle pedals. To know which gear the transmission is in, look
at the round current gear indicator on the right-hand
control panel as shown in Fig. 8.20.
The TCU always selects first gear to start the vehicle
in motion. It is possible, in manual mode, to start an
unloaded or lightly loaded vehicle in second gear. In
most cases, second gear is acceptable for downhill
starts. In other situations, for best results always start
moving in first gear. Loaded vehicles, or vehicles on
substantial grades, must start moving only in first
gear.
Change gears only when absolutely necessary. Skip
gears if needed.
8.22
Drivetrain
1
1
2
CHECK
TRANS
2
TRANS
TEMP
BRAKE
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1. "CHECK TRANS" Light
2. "TRANS TEMP" Light
10/13/2003
Fig. 8.21, Telltale Lights, AGS Transmissions
f270079
To know which gear the transmission is in, look at the
current gear indicator.
1. Current Gear Indicator
2. SmartShift Control
Fig. 8.20, Shift Controls and Indicators, AGS
Transmissions
CAUTION
At the first sign of a transmission malfunction,
take the vehicle out of service immediately. Depending on the type of problem, further shifting
may not be possible, and driveline torque may be
interrupted.
Fig. 8.22, Power-Up Dot Display
Operation, AGS
Power Up
1.
With the parking brake set and/or the brake
pedal pressed down, select neutral (N) by moving the selector switch to the center position.
2.
With the transmission in neutral, turn on the ignition switch. The "CHECK TRANS" and "TRANS
TEMP" telltale lights come on and go out again
(bulb check). See Fig. 8.21.
3.
On power up, the current gear indicator shows
the dot display, arranged in a square pattern. All
dots in the pattern should light up, without gaps
or spaces. See Fig. 8.22.
4.
When the current gear indicator shows "N," start
the engine.
8.23
f610678
10/13/2003
NOTE: No matter what the circumstances, do
not start the engine unless the current gear indicator shows "N." See Chapter 13 for jump starting information.
5.
Select drive (D) by pressing in the neutral lock
button and moving the selector switch downward
to the position below neutral. Release the parking brake and/or service brake pedal. The gear is
displayed on the current gear indicator.
NOTE: When D is selected, the transmission
starts up in first gear. To start up in second gear
(downhill start, vehicle unloaded or lightly
loaded), pull up on the SmartShift lever when
the current gear indicator displays "1."
Drivetrain
6.
On a level grade, press down on the throttle
pedal to allow the vehicle to move forward. The
vehicle will not move until the pedal is depressed.
WARNING
When starting or stopping on hills and grades,
use extra care to prevent the vehicle from rolling
back. A rollback accident could cause death, serious personal injury, or property damage.
7.
5.
If the current gear indicator flashes "PB" when
the engine is shut down, set the parking brake
and move the selector switch to "N."
Automatic and Manual Modes
The SmartShift control has a slide switch located on
the body of the lever just before the paddle widens
out. See Fig. 8.23. The slide switch controls the forward driving mode, automatic or manual.
Prevent the vehicle from rolling backwards when
stopped on a hill or grade, or when the vehicle is
starting from a stop on a hill or grade.
7.1
To start from a full stop on a hill or grade,
quickly move your foot from the brake
pedal and press firmly on the throttle
pedal.
2
1
On steep hills, set the parking brake and
release it only when there is enough engine power to prevent rollback.
7.2
To stop on a hill or grade, press and hold
the brake pedal to keep the vehicle from
moving.
On steep hills, set the parking brake.
Never hold a hill with the throttle pedal.
This will cause the clutch to overheat.
Power Down
1.
Bring the vehicle to a complete stop.
2.
Set the parking brake.
3.
Move the selector switch to N. Wait until "N" appears on the current gear indicator.
WARNING
Always apply the parking brake before shutting
down the engine. AGS will shift into neutral after
shutdown, regardless of the position of the shift
lever. If you do not set the parking brake, the vehicle could roll and cause an accident resulting
in death, serious personal injury, or property
damage.
4.
3
Turn the ignition switch off and shut down the
engine.
01/19/2004
f270079b
1. Slide Switch (controls forward driving mode)
2. Selector Switch (controls gear selection)
3. Neutral Lock Button (prevents accidental shift into
gear)
Fig. 8.23, Switches, AGS Transmissions
To change mode at any time, move the slide switch
in the desired direction. This allows the driver to respond to a wide range of driving conditions, such as
blind corners, tight curves, and steep hills.
IMPORTANT: Whatever the mode, it is always
possible to shift manually by moving the lever
up or down as needed.
In either mode, the gear indicator displays the current gear. See Fig. 8.24.
Automatic Mode (AUTO)
Automatic drive mode (AUTO) is recommended for
most driving conditions. For the best fuel economy,
always use AUTO mode.
In AUTO mode, upshifts and downshifts are made by
the transmission without driver intervention. Press in
8.24
Drivetrain
• On hills, steep grades, or other situations
where driveline torque interruption is not desirable
• During off-road driving or driving with a locked
differential
• In downhill driving where control of engine
braking is needed
• If necessary to hold a specific gear on a down-
grade
In manual drive mode (MAN), upshifts and downshifts are made by the driver:
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10/13/2003
NOTE: The gear indicator displays the current gear. In
this example, it displays first gear.
Fig. 8.24, Current Gear Display
• To shift up, pull the lever up (towards you).
• To shift down, push the lever down (away from
you).
the neutral lock button, move the selector switch to
drive (D), and press down on the throttle pedal. The
transmission will shift automatically through the forward gears.
The system will hold the current gear until the driver
requests a shift. In downhill situations in particular,
the driver must be alert to vehicle speed and maintain vehicle control by downshifting and/or using the
service brakes as needed.
If driving conditions require, it is still possible to request a manual shift. The transmission will make the
shift unless the selected gear would cause engine
overspeed.
When braking or slowing in MAN, downshift as necessary to prevent lugging the engine when speed is
resumed. If the vehicle comes to a complete stop,
the TCU resets the transmission to neutral.
If the driver presses down on the throttle pedal after
a manual downshift in automatic mode, the transmission will upshift again if the TCU requires it.
NOTE: A downshift request will be refused if the
selected gear would cause engine overspeed.
On downgrades, the transmission holds the current
gear until the driver requests a shift, or presses the
throttle pedal.
WARNING
While driving off-road or with locked differential
in AUTO mode, use extra caution. Shifts of the
AGS could interrupt power to the drive wheels,
causing a rollback accident while climbing steep
grades at low speeds. A rollback accident could
cause death, serious personal injury, or property
damage.
Manual Mode (MAN)
Manual mode may be required under certain conditions, such as:
• In difficult or slippery conditions
8.25
Cruise Control
Cruise control is fully functional with AGS transmission in either AUTO or MAN mode.
In AUTO, the TCU will adjust the gear selections to
maintain the speed settings as desired. No driver
action is necessary.
In MAN, the vehicle speed settings must be within
the engine speed range for the gear selected. If the
engine cannot maintain set speed due to changes in
road grade, the driver must downshift or upshift as
necessary.
For vehicles equipped with a power take-off (PTO)
unit, two modes of operation are possible, stationary
and mobile. For PTO operation, see Chapter 7.
Drivetrain
Selecting Gears
Reverse
Reverse (R) is at the upper end of the three-position
selector switch located at the end of the SmartShift
control lever. To select reverse (R), press in the neutral lock button and move the selector switch upward
to the position above neutral. When reverse is selected, the letter "R" displays on the gear indicator.
See Fig. 8.25.
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10/13/2003
Fig. 8.26, Neutral Display
Neutral is always available during operation, whatever the vehicle speed. When in neutral, requests to
upshift or downshift are ignored. If the selector switch
is moved from neutral to drive while the vehicle is
moving, the transmission will shift into a gear within
the operating torque range of the engine.
WARNING
f610681
10/14/2003
Fig. 8.25, Reverse Gear Display
IMPORTANT: The vehicle must come to a complete stop before selecting reverse. If reverse is
selected with the vehicle moving forward, an
audible alert will sound and continue sounding
at three-second intervals until the selector
switch is returned to N or D.
Always apply the parking brake before shutting
down the engine. AGS will shift into neutral after
shutdown, regardless of the position of the shift
lever. If you do not set the parking brake, the vehicle could roll and cause an accident resulting
in death, serious personal injury, or property
damage.
Once the vehicle has come to a complete stop, reverse can be engaged.
Before shutting down the engine, return the selector
switch to "N." When the ignition is turned off, the
transmission will reset to neutral during power down.
Neutral
Drive
Neutral (N) is in the center of the three-position selector switch located at the end of the SmartShift
control lever. Always start the engine in neutral. To
select neutral, move the selector switch to the center
position. When neutral is selected, the letter "N" displays on the gear indicator. See Fig. 8.26.
IMPORTANT: The vehicle must come to a complete stop before selecting drive. If drive is selected with the vehicle moving in reverse, an
audible alert will sound and continue sounding
at three-second intervals until the selector
switch is returned to N or R.
WARNING
Do not coast in neutral. Coasting in neutral can
cause an accident, possibly resulting in severe
personal injury or death.
Drive (D) is at the lower end of the three-position selector switch located at the end of the SmartShift
control lever. To select drive, press in the neutral lock
button and move the selector switch to the position
below neutral. When drive is selected, the number of
8.26
Drivetrain
the currently selected forward gear (1, 2, 3, 4 , 5, or
6) displays on the gear indicator. See Fig. 8.24.
AGS Diagnostics
CAUTION
Upshifting
NOTE: The driver can manually upshift at any
time, even when the slide switch is set to AUTO
mode.
To request an upshift with the transmission in drive,
pull the control lever up (towards you). If the gear is
available, the transmission upshifts and the new gear
displays on the gear indicator.
As in a manual transmission, upshifting too early
causes engine lugging and uneven operation.
To achieve smooth operation in MAN mode, upshift
when the engine speed reaches approximately 2000
revolutions per minute (rpm). Heavy loads or steep
grades require higher rpm; lighter loads require lower
rpm.
An unavailable request to upshift is not stored in
memory. The upshift must be requested again.
Downshifting
NOTE: The driver can manually downshift at
any time, even when the slide switch is set to
AUTO mode.
To request a downshift with the transmission in drive,
push the control lever down (away from you). If the
gear is available, the transmission downshifts and
the new gear displays on the gear indicator.
Downshifts are not available if the engine speed after
the shift would exceed 2700 rpm. If the gear requested is unavailable, an audible alert will sound.
An unavailable request to downshift is not stored in
memory. The downshift must be requested again.
To achieve smooth operation in MAN mode, downshift when the engine speed reaches approximately
1200 rpm.
Before starting down a hill, slow down. Downshift to
a speed that you can control without hard pressure
on the service brakes.
Before entering a curve, slow down to a safe speed.
Downshift if necessary. This lets you use some
power through the curve to help the vehicle be more
stable when turning. It also allows you to regain
speed faster as you come out of the curve.
8.27
At the first sign of a transmission malfunction,
take the vehicle out of service immediately. Depending on the type of problem, further shifting
may not be possible, and driveline torque may be
interrupted.
System Malfunction
If the "CHECK TRANS" telltale light comes on while
driving, the audible alert sounds, and the current
gear indicator begins to flash between the current
gear and "SM" (system malfunction), there is a problem which may or may not be apparent to the driver.
Bring the vehicle at once to a safe stopping place
and call an authorized Freightliner service facility for
assistance.
Clutch Overload
If the "TRANS TEMP" telltale light comes on while
driving and the current gear indicator begins to flash
between the current gear and "CO" (clutch overload),
the clutch has begun to overheat.
The clutch overload may have been caused by improper driving practices such as frequent and rapid
start/stop driving, or hillholding with the throttle pedal.
In this case, allow the clutch to cool, and continue
on, but cease the improper driving practices.
If the clutch overload message returns or continues,
the clutch is worn or damaged. Bring the vehicle at
once to a safe stopping place and call an authorized
Freightliner service facility for assistance.
Low Hydraulic Fluid Level
IMPORTANT: The only hydraulic fluid permitted
in this system is Pentosin CHF 11S. No other
fluid can be substituted.
If the "CHECK TRANS" telltale light comes on while
driving and the current gear indicator begins to flash
between the current gear and "FL" (fluid level), there
has been an unusual loss of hydraulic fluid. Bring the
vehicle at once to a safe stopping place and call an
authorized Freightliner service facility for assistance.
The hydraulic reservoir holds about 1.05 quarts (one
liter) of Pentosin CHF 11S.
Drivetrain
NOTE: After hydraulic fluid loss, a special procedure is required to fill the hydraulic reservoir.
This procedure must be carried out by an authorized Freightliner service facility.
Differential Lock Switch
CAUTION
Differential lock should only be engaged when
the vehicle is stopped or moving slowly at low
throttle. This will prevent internal axle damage.
Meritor™ Drive Axles
Refer to the Meritor website for additional information, www.arvinmeritor.com.
Drive Axles With Differential Lock
The Meritor driver-controlled differential lock feature
(side-to-side wheel lock, traction control, or traction
equalizer) is available on single-drive or dual-drive
rear axles. It is available on both axles of a dualdrive vehicle, or on one only. It is only available on
drive axles. Differential lock must only be used under
adverse road conditions where greater traction is
needed. With differential lock on, the turning radius is
increased and vehicle handling is affected. The differential lock switch (Fig. 8.27) allows the driver to lock
the wheels on the same axle together. The red differential lock warning light illuminates on the dash message center when differential lock is engaged.
Normally, when differential lock is available on dualdrive vehicles, one switch activates the lock on both
rear drive axles. As an option, it possible to have two
differential lock switches, one for the forward rear
and one for the rearmost drive axle. It is also possible for some vehicles to have differential lock on
only one of the drive axles.
A two-position guarded rocker switch (Fig. 8.27) controls differential lock, causing the wheels on each
axle governed by the switch to rotate together. To
lock the wheels together, press the upper half of the
rocker momentarily (at the red LED). To unlock the
wheels, press the upper half of the rocker again.
IMPORTANT: The differential lock rocker switch
is guarded to prevent unintentional switch activation. If the LED in the switch begins to blink
during normal operation, when the switch has
not been activated, this indicates an error condition. Bring the vehicle to an authorized Freightliner service facility as soon as possible.
When the differential lock switch is pressed, three
responses are possible: a normal response, a slow
response, and an abnormal response.
10/26/2001
f610596
Fig. 8.27, Differential Lock Switch
Differential lock provides maximum traction under
slippery conditions. When the differential lock is engaged, the clutch collar completely locks the differential case, gearing, and axle shafts together, maximizing the traction of both wheels and protecting against
spinout.
Under normal traction conditions, do not use the differential lock feature.
Normal Response: The LED in the switch blinks until
the axle has responded to the request to lock the
wheels. At this point, the LED comes on steady and
stays illuminated. In normal operation, the wheels
may lock so quickly that the blinking of the switch is
barely noticeable.
If operation of the switch is not possible for any reason (ignition is turned off, vehicle is moving faster
than 25 mph, etc.), the LED will stop blinking and
turn off.
Slow Response: If operation of the switch is slowed
for any reason (vehicle moving too fast, low air pressure, etc.), the switch will continue to blink until the
wheels are able to lock. As in the normal response,
the LED comes on steady and stays illuminated once
the wheels have locked.
8.28
Drivetrain
NOTE: If the vehicle is moving too fast, let up
slightly on the accelerator. As the vehicle slows,
the wheels will lock.
A
Abnormal Response: If the LED blinks for more than
30 seconds, the lock mechanism may not be fully
engaged/disengaged. Bring the vehicle to an authorized Freightliner service facility for testing.
B
Differential Lock Operation
WARNING
Locking the wheels when the vehicle is traveling
down steep grades or when the wheels are slipping could damage the differential and/or lead to
loss of vehicle control, causing personal injury
and property damage.
Lock the wheels only when the vehicle is standing
still or moving at very low speed, less than 5 mph (8
km/h). Never lock the wheels when the vehicle is
traveling down steep grades or when the wheels are
slipping.
NOTE: On some vehicles, the differential lock
system is connected through the low speed
range of the transmission. If this system is used,
the transmission must be in the low speed
range for the wheels to fully lock.
WARNING
A vehicle with locked wheels can still slip sideways, causing possible loss of vehicle control,
personal injury, and property damage.
Be especially careful when driving under slippery
conditions with the wheels locked. Though forward
traction is improved, the vehicle can still slip sideways.
If the vehicle is moving, maintain a constant vehicle
speed when the differential lock is turned on. Briefly
let up on the accelerator to relieve torque on the
gearing, allowing the wheels to lock completely.
When the wheels are fully locked, the turning radius
will increase because the vehicle understeers. See
Fig. 8.28. Drive cautiously and do not exceed 25
mph (40 km/h).
To disengage differential lock after leaving poor road
conditions, operate the differential lock switch as discussed above while maintaining vehicle speed. Let
8.29
f350079a
02/09/96
A. Turning Radius When the Differential Lock is
Engaged (understeer condition)
B. Turning Radius When the Differential Lock is
Disengaged
Fig. 8.28, Turning Radii
up momentarily on the accelerator to allow the
wheels to fully unlock, then resume driving at normal
speed.
NOTE: If the differential lock system is connected with the transmission in its low speed
range, shifting out of the low speed range will
also disengage the differential lock function. The
switch will blink until the wheels unlock, and
then go out.
Tandem Drive Axles With Interaxle
Lock
CAUTION
The interaxle lock should not be engaged on a
vehicle with obviously spinning wheels. Engagement at high speed or power can damage the
axle(s).
Meritor has an interaxle lock (axle lock, interaxle differential lockout) feature that is standard on all dualdrive (tandem-drive) vehicles. Interaxle lock is recommended for use under adverse road conditions
where greater traction is needed. See the axle manufacturer’s manual provided with the vehicle for more
information.
The interaxle lock switch (Fig. 8.29) allows the driver
to lock both rear axles together. The red interaxle
warning light illuminates on the dash message center
when interaxle lock is engaged.
Drivetrain
If operation of the switch is not possible for any reason (ignition is turned off, vehicle is moving too fast,
etc.), the LED will stop blinking and turn off.
Slow Response: If operation of the switch is slowed
for any reason (by cold weather, low air pressure,
etc.), the switch will continue to blink until the axles
lock together, or for a maximum of 10 seconds. As in
the normal response, the LED comes on steady and
stays illuminated.
10/26/2001
f610595
Fig. 8.29, Interaxle Lock Switch
When the interaxle lock is not engaged, there is differential action between the two axles. The differential compensates for different wheel speeds and
variations in tire size. Keep the interaxle lock disengaged when driving on roads where traction is good.
When the interaxle lock is engaged, the differential
action between the two axles is locked. Both drive
axles now share the power. Both axles, and both
sets of wheels, turn together at the same speed. The
interaxle lock should be used when the vehicle encounters poor traction conditions; however, it also
increases drivetrain and tire wear and should be
used only when improved traction is required.
Interaxle Lock Switch
A two-position guarded rocker switch (Fig. 8.29) controls interaxle lock, causing both axle shafts to rotate
together. To lock the axles together, press the upper
half of the rocker momentarily (at the red LED). To
turn off interaxle lock, press the lower half of the
rocker (at the double-axle icon).
IMPORTANT: The interaxle lock rocker switch is
guarded to prevent unintentional switch activation. This switch does not have a diagnostic
blink function when inactive.
When the interaxle lock switch is pressed, three responses are possible: a normal response, a slow response, and an abnormal response.
Normal Response: The LED in the switch blinks until
the interaxle lock is engaged. At this point, the LED
comes on steady and stays illuminated. In normal
operation, the interaxle may lock so quickly that the
blinking of the switch is barely noticeable.
Abnormal Response: If the LED blinks for more than
30 seconds, the lock mechanism may not be fully
engaged/disengaged. Bring the vehicle to an authorized Freightliner service facility for testing.
Interaxle Lock Operation
To engage interaxle lock and achieve maximum pulling power in slippery or hazardous road conditions,
operate the interaxle lock switch as discussed above,
while maintaining vehicle speed. Let up momentarily
on the accelerator until the axle lock engages. Proceed over poor road conditions with caution. Do not
wait until traction is lost and the tires are spinning
before engaging the interaxle lock.
CAUTION
Do not turn on the interaxle lock switch when the
tires are slipping. Do not continuously operate
the vehicle with the interaxle lock engaged during good road conditions. To do so could result
in damage to the axle gearing and excessive tire
wear.
To disengage the interaxle lock after leaving poor
road conditions, operate the interaxle lock switch as
discussed above while maintaining vehicle speed.
Let up momentarily on the accelerator to allow the
axles to fully unlock, then resume driving at normal
speed.
Axle Shift
CAUTION
To prevent transmission and axle damage, make
sure the automatic transmission is in high range
when performing an axle shift with the vehicle
moving.
Axle shift is a function installed on vehicles with twospeed axles to allow the use of the low speed range
8.30
Drivetrain
when greater traction and maximum pulling power is
needed at low engine speed (rpm).
the axle may shift so quickly that the blinking of the
switch is barely noticeable.
Under normal operating conditions, the vehicle is operated using the high-speed gear ratios of the axle.
Under extreme weather or off-road conditions, at low
speed and rpm and/or to pull heavy loads, the vehicle must be operated using the low-speed, or reduction, gear ratios of the axle.
If operation of the switch is not possible for any reason (interaxle lock is on, ignition is turned off, etc.),
the LED will stop blinking and turn off.
Axle Shift Switch
The axle shift switch is a two-position guarded rocker
switch (Fig. 8.30) installed on vehicles with twospeed axles.
Slow Response: If operation of the switch is slowed
for any reason (by cold weather, low air pressure,
etc.), the switch will continue to blink until the axle
shifts. As in the normal response, the LED comes on
steady and stays illuminated.
Abnormal Response: If the LED blinks for more than
30 seconds, the axle shift function/mechanism may
not be operating correctly. Bring the vehicle to an
authorized Freightliner service facility for testing.
Axle Switch Interlock
NOTE: On vehicles with tandem drive axles,
there is an interlock that prevents an axle from
shifting speed whenever the interaxle lock is on.
10/26/2001
f610594
Fig. 8.30, Axle Shift Switch
To shift the axle from low speed to high speed, press
the upper half of the rocker momentarily (at the
LED). To turn the axle shift off (switch from high
speed back to low speed), press the upper half of
the rocker again. When the axle has shifted speed,
the LED turns off.
When the panel lights are on, the AXLE SHIFT legend is backlit in green.
IMPORTANT: The axle shift rocker switch is
guarded to prevent unintentional switch activation. If the LED in the switch begins to blink during normal operation, when the switch has not
been activated, this indicates an error condition.
Bring the vehicle to an authorized Freightliner
service facility as soon as possible.
When the axle shift switch is pressed, three responses are possible: a normal response, a slow response, and an abnormal response.
Normal Response: The LED in the switch blinks until
the axle shifts speed. At this point, the LED comes
on steady and stays illuminated. In normal operation,
8.31
If the axle shift switch is pressed when the interaxle
lock is on, the axle shift will not be completed. The
LED does the following:
• If the LED is off, the LED comes on briefly and
turns off again.
• If the LED is on, it stays on.
To complete the axle shift, turn off the interaxle lock
and press the axle shift switch again. If still needed,
the interaxle lock can then be reactivated.
9
Steering and Brake Systems
Steering System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1
Air Brake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1
Hydraulic Brake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.6
Steering and Brake Systems
Steering System
Steering Wheel Adjustment
Two steering wheels are available: a standard 18inch (450-mm) steering wheel and an optional 20inch (500-mm) steering wheel.
When there is no load on the vehicle and the front
tires are pointed straight ahead, the standard steering wheel spokes should be at the 3 o’clock and 9
o’clock positions or within 10 degrees of these positions. See Fig. 9.1.
2
1
WARNING
Driving the vehicle without the power-assist feature of the steering system requires much greater
effort, especially in sharp turns or at low speeds,
which could result in an accident and possible
injury.
Drivers should use the power available with a power
steering system carefully. If the front tires become
lodged in a deep chuckhole or rut, drive the vehicle
out instead of using the steering system to lift the
tires from the hole. Avoid turning the tires when they
are against a curb as this places a heavy load on
steering components and could damage them.
10°
10°
If the power-assist feature does not work due to hydraulic fluid loss, steering pump damage, or some
other cause, bring the vehicle to a safe stop. Do not
drive the vehicle until the cause of the problem is
corrected.
Air Brake System
10°
10°
f461923
11/14/2001
NOTE: The standard steering wheel is shown.
1. 9 o’Clock
2. 3 o’Clock
Fig. 9.1, Steering Wheel Centered
On the optional 20-inch (500-mm) wheel, the steering
wheel spokes should be at the 4 o’clock and 8
o’clock positions or within 10 degrees of these positions. For steering wheel adjustment procedures, see
Group 46 of the Business Class® M2 Workshop
Manual.
Power Steering System
The power steering system consists of a steering
gear (which includes a manual steering mechanism,
a hydraulic control valve, and a hydraulic power cylinder), hydraulic hoses, power steering pump, power
steering reservoir, and other components. Some
models are also equipped with a separate hydraulic
power cylinder on the right side of the front axle.
The power steering pump, driven by the engine, provides the power assist for the steering system. If the
engine is not running, there is no power assist.
9.1
A dual air brake system consists of two independent
air brake systems that use a single set of brake controls. Each system has its own reservoir, plumbing,
and brake chambers. The primary air system operates the service brakes on the rear axle; the secondary air system operates the service brakes on the
front axle. Service brake signals from both systems
are sent to the trailer.
Primary Air Brake System
Loss of air pressure in the primary air system causes
the rear service brakes to become inoperative. The
front brakes will continue to be operated by the secondary air system. In addition, the trailer brakes (if
equipped) will be operated by the secondary air
system.
Secondary Air Brake System
Loss of air pressure in the secondary air system
causes the front axle brakes to become inoperative.
The rear service brakes will continue to be operated
by the primary air system. In addition, the trailer
brakes (if equipped) will be operated by the primary
air system.
Steering and Brake Systems
Emergency Braking System
When air pressure is lost in either the primary or secondary air system, the air compressor will operate,
but the air supply in the other system, the one that is
not leaking, will not be replenished. There will be
enough air in the other system to stop the vehicle
safely. The dual air brake system thus provides
emergency braking capability. When the low air pressure warning light and emergency buzzer first come
on, stop the vehicle immediately. Do not drive the
vehicle until the cause of the problem is corrected.
ing brakes and the trailer service brakes. When the
tractor and trailer parking brakes (or trailer service
brakes) are both applied, the trailer brakes can be
released by pushing in the red knob, leaving the tractor parking brakes applied.
The trailer brake lever (hand control valve) is used
for applying the trailer brakes without applying the
truck or tractor service brakes. It is usually mounted
on the right-hand control panel. See Fig. 9.3.
Parking Brakes, Tractor and Trailer
The yellow diamond-shaped knob (parking brake
control valve) on the auxiliary dash panel applies the
parking brakes (spring brakes). Pulling out the knob
applies both the tractor and the trailer parking brakes
and automatically causes the red octagonal knob
(trailer air supply valve) to pop out. See Fig. 9.2.
1
2
f610591
10/17/2001
Fig. 9.3, Trailer Brake Lever
f610291
03/10/99
1. Trailer Air Supply Valve (red knob)
2. Parking Brake Control Valve (yellow knob)
Fig. 9.2, Brake Valve Control Knobs
The red octagonal-shaped knob on the auxiliary dash
panel operates the trailer air supply valve. After the
vehicle and its air hoses are connected to a trailer,
and the pressure in the air system is at least 65 psi
(448 kPa), the red knob must be pushed in (and
should stay in) to charge the trailer air supply system
and release the trailer parking brakes. Before disconnecting a trailer or when operating a vehicle without
a trailer, the red knob must be pulled out.
If pressure in both air systems drops to 35 to 45 psi
(241 to 310 kPa), the red knob automatically pops
out, exhausting the trailer air supply and applying the
trailer parking brakes.
If the trailer is not equipped with parking brakes, pulling out the yellow knob applies both the tractor park-
The valve can be partially or fully applied, but in any
partially on position it will be overridden by a full application of the service brake pedal. Moving the lever
down applies the trailer brakes, while moving it up
releases the trailer brakes. The lever will automatically return to the up position when it is released.
On Tractor-Trailers
If both the primary and secondary air systems become inoperative on tractor-trailers, the trailer service
brakes or parking brakes will automatically apply
when the air pressure drops below 35 to 45 psi (241
to 310 kPa).
The tractor parking brakes will automatically apply
when the air pressure drops below 20 to 30 psi (138
to 207 kPa).
On Trucks
Trucks are equipped with spring brake modulation. If
an air pressure loss occurs in the primary air system,
the rear parking brakes will be modulated (applied
and released) in proportion to the service brake application. There will only be enough air in the secondary system for two to four brake applications, at
9.2
Steering and Brake Systems
which time the parking brake control valve will pop
out and fully apply the brakes.
brake application. Make sure all occupants are wearing seat belts.
On trucks, the parking brakes will apply when the air
pressure drops below 20 to 30 psi (138 to 207 kPa).
Do not wait for the brakes to apply automatically. Before continuing to operate the vehicle, correct the
cause of the air loss.
Parking Brake Interlock
Automatic Slack Adjusters
Automatic slack adjusters are required on all vehicles
equipped with air brakes manufactured after October
20, 1994. Automatic slack adjusters should never be
manually adjusted except during routine maintenance
of the foundation brakes (e.g., replacing shoes), during slack adjuster installation or in an emergency
situation.
When the brake pushrod stroke exceeds the legal
brake adjustment limit on a vehicle, there likely is a
mechanical problem with the foundation brake components, or the adjuster is improperly installed.
Visit a repair facility as soon as possible when
brakes equipped with automatic slack adjusters are
determined to be out of adjustment.
WARNING
CAUTION
Do not continually press down on the parking
brake control valve (yellow knob) without pressing down on the service brake pedal. This will
damage the safety interlock.
The service brakes and parking brakes have a safety
interlock that prevents the unintentional release of
the parking brake. If the yellow knob is pressed in, it
will pop back out unless the service brake pedal is
being pressed down.
A decal on the dash alerts you to press down on the
service brake pedal before releasing the parking
brake. If you do not, the yellow knob will not allow
itself to be pressed in, but will return to its old position.
Operating the Brakes
To ensure safe operation and minimum brake wear,
do the following steps when operating the brakes.
1.
Manually adjusting an automatic slack adjuster to
bring the pushrod stroke within legal limits is
likely masking a mechanical problem. Adjustment
is not repairing. In fact, continual adjustment of
automatic slack adjusters may result in premature wear of the adjuster itself. Further, the improper adjustment of some automatic slack adjusters may cause internal damage to the
adjuster, thereby preventing it from properly
functioning.
Air Brake Operation
When the ignition switch is turned on, the low air
pressure warning light (pressure circle icon) illuminates and the emergency buzzer sounds.
The warning light and buzzer shut off when air
pressure in both systems reaches 65 to 75 psi
(448 to 517 kPa).
2.
Before driving your vehicle, continue to monitor
the air pressure system until the air compressor
has built up a minimum pressure of 95 psi (655
kPa) in both the primary and secondary air systems.
3.
While driving, the low air pressure warning light
and buzzer come on if air pressure drops below
65 to 75 psi (448 to 517 kPa) in either system. If
this happens, check the air system pressure
gauges to determine which system has low air
pressure.
WARNING
Do not operate the vehicle with the front brakes
backed off or disconnected. Backing off or disconnecting the front brakes will not improve vehicle handling and may lead to loss of vehicle
control, resulting in property damage or personal
injury.
Before driving the vehicle, secure all loose items in
the cab so that they will not fly forward during a full
9.3
Monitor the air pressure system by observing the
low air pressure warning light, the emergency
buzzer, and both the primary and secondary air
pressure gauges.
Steering and Brake Systems
Although vehicle speed can be reduced using
the service brake, either the front or rear service
brakes will not be operating, causing a longer
stopping distance.
Bring the vehicle to a safe stop and have the air
system repaired before continuing.
4.
During normal brake stops, depress the service
brake until braking action slows down the vehicle. Increase or decrease the pressure on the
pedal so that the vehicle comes to a smooth,
safe stop.
IMPORTANT: In the event of a total loss of service brakes, use the parking brake control valve
(yellow knob) to bring the vehicle to a complete
stop in the safest location possible.
5.
6.
When the forward speed of the vehicle has decreased almost to the idling speed of the engine,
press in the clutch pedal (on manual transmissions) and shift the transmission to neutral. Apply
the parking brakes, if the vehicle is to be parked.
If the brakes are wet, drive the vehicle in low
gear and lightly apply the brakes to heat and dry
them.
CAUTION
Do not use the spring parking brakes if the service brakes are hot, such as after descending a
steep grade. Also, do not use the spring parking
brakes during freezing temperatures if the service brakes are wet. To do so could damage the
brakes if hot, or cause them to freeze during cold
weather.
If the brakes are wet, drive the vehicle in low
gear and lightly apply the brakes to heat and dry
them. Allow hot brakes to cool before using the
spring parking brakes. Always chock the tires.
7.
Allow hot brakes to cool before using the parking
brakes. Always chock the tires.
Parking the Vehicle
WARNING
Do not use the trailer service brakes for parking;
they are not designed for this purpose. If air
bleeds out of the trailer air tank during parking,
the vehicle could roll causing serious personal
injury or property damage.
IMPORTANT: Air pressure in the primary or secondary reservoir must be at least 65 psi (448
kPa) before the tractor parking brakes and the
trailer service brakes (or parking brakes) can be
released.
On trailers without parking brakes, do the following to
park safely:
• To park just the trailer, chock the trailer tires
before disconnecting the tractor.
• To park a tractor with a trailer, apply the tractor
parking brakes.
Caging the Parking Brakes
WARNING
Do not drive the vehicle with the parking brakes
caged. If the vehicle is driven with the parking
brakes caged, there would be no means of stopping the vehicle if a complete loss of air pressure
occurred. This could result in serious personal
injury or vehicle damage.
To move a vehicle with insufficient system air pressure, it is necessary to release the parking brake
springs.
There are two ways to do this:
• Apply an external air source at the gladhands;
• Cage (manually release) the parking brakes.
IMPORTANT: Before caging the parking brakes,
make the connection to a towing vehicle or
chock the tires.
After correcting the brake system problem, uncage
the parking brakes before resuming normal vehicle
operation.
Meritor™ WABCO® Antilock Braking
System (ABS) for Air Brakes
ABS is an electronic wheel-speed monitoring and
control system that works with the air brake system.
It passively monitors vehicle wheel speed at all
times, but controls wheel speed during an emergency or reduced-traction stop. In normal braking
9.4
Steering and Brake Systems
applications, the standard air brake system is in effect.
ABS Operation
Even if the ABS system is partially or completely inoperative, normal braking ability is usually maintained.
The Meritor WABCO ABS is a four-sensor system. It
combines one front-axle control channel with one
rear-axle control channel to form one control circuit.
IMPORTANT: If a solenoid control valve (or
combination solenoid control valve) is damaged
and inoperative, normal braking may be impaired.
Example: The sensor and solenoid control valve at
the left front wheel form a control circuit with the sensor and solenoid valve at the right rear wheel.
ABS Indicator Lights
ABS includes signal-generating tone wheels and sensors located in the wheel hubs of each sensed axle.
The sensors transmit vehicle wheel speed information to an electronic control unit.
IMPORTANT: For proper ABS system operation,
do not change tire sizes. The sizes of the tires
installed during production are programmed into
the electronic control unit. Installing different
sized tires could result in a reduced braking
force, leading to longer stopping distances.
IMPORTANT: If any of the ABS indicator lights
do not work as described below, or come on
while driving, repair the ABS system immediately to ensure full antilock braking capability.
Tractor ABS Light
If equipped only with the tractor ABS system, the
amber TRACTOR ABS indicator light (see Fig. 9.4)
comes on after the ignition switch is turning on. The
indicator light goes out only if all of the tractor ABS
components are working.
During emergency or reduced-traction stops, fully
depress the brake pedal until the vehicle comes to a
safe stop. Do not pump the brake pedal. With the
brake pedal fully depressed, the ABS system will
control all wheels to provide steering control and a
reduced braking distance.
2
1
3
Although the ABS system improves vehicle control
during emergency braking situations, the driver still
has the responsibility to change driving styles depending on the existing traffic and road conditions.
For example, the ABS system cannot prevent an accident if the driver is speeding or following too close
on slippery road surfaces.
The main circuit of the control unit interprets the
speed sensor signals and calculates wheel speed,
wheel retardation, and a vehicle reference speed. If
the calculations indicate wheel lockup, the main circuit signals the appropriate solenoid control valve to
reduce braking pressure.
The electronic control unit also has a safety circuit
that constantly monitors the wheel sensors, solenoid
control valves, and the electrical circuitry. During
emergency braking, the solenoid control valve alternately reduces, increases, or maintains the supply of
air pressure in the brake chamber, thereby preventing front and/or rear wheel lockup.
9.5
10/12/2000
f610454
1. Tractor ABS Indicator
2. Wheel Spin Indicator
(optional)
3. Trailer ABS Indicator
Fig. 9.4, ABS Indicator Lights
CAUTION
An accumulation of road salt, dirt, or debris on
the ABS tone wheels and sensors can cause the
ABS warning light to come on. If the ABS light
does come on, the tone rings and sensors
should be inspected for corrosion and serviced if
necessary. The service should include cleaning
Steering and Brake Systems
of the tone rings and sensors. If any tone ring on
a vehicle shows severe corrosion, all tone rings
on that vehicle should be replaced.
During winter months in areas where corrosive
materials are used on the highways, periodically
clean the underside of the vehicle, including the
tone rings and sensors, to ensure proper ABS
function and to protect the components from corrosion. Clean more frequently when unusually
corrosive chemicals are being used.
During vehicle operation, if the safety circuit senses
a failure in any part of the ABS system (a sensor,
solenoid control valve, wiring connection, short circuit, etc.), the TRACTOR ABS indicator light comes
on and the control circuit where the failure occurred
is switched to normal braking action. The remaining
control circuit will retain the ABS effect.
Trailer ABS Light
The amber TRAILER ABS indicator light operates as
follows when a compatible trailer is properly connected to the tractor:
• When the ignition switch is turned to the on
position, the trailer ABS light will illuminate momentarily, then turn off.
• If the light comes on momentarily during ve-
hicle operation, then shuts off, a fault was detected and cleared.
• If the light flickers, or comes on and goes off
repeatedly, it could indicate an intermittent wiring problem. Bring the vehicle to an authorized
Freightliner service facility for testing and repairs.
• If the light comes on and stays on during ve-
hicle operation, there is a fault with the trailer
ABS. Repair the trailer ABS system immediately to ensure full antilock braking capability.
The Trailer ABS light will not illuminate unless a compatible trailer is connected to the tractor.
IMPORTANT: If a compatible trailer is connected, and the light is not illuminating for three
seconds when the ignition switch is turned to
the ON position, it is possible that the light is
burnt out.
Wheel Spin Light
If equipped with Automatic Traction Control (ATC),
the amber WHEEL SPIN indicator light illuminates if
one of the drive wheels spins during acceleration.
When the light illuminates, partially release the
throttle pedal until the light goes out. The light goes
out when the wheel stops spinning.
If slippery road conditions continue, turn on the differential lock switch (on dual-drive vehicles, turn on the
interaxle lock switch). See Chapter 8 for axle switch
instructions.
CAUTION
Do not turn the differential lock switch on while
the WHEEL SPIN indicator light is on. To do so
could damage the rear axle.
Automatic Traction Control, Optional
Automatic Traction Control is an option available on
ABS-equipped vehicles with air brake systems. It improves traction when vehicles are on slippery surfaces by reducing drive wheel overspin. ATC works
automatically in two ways.
• If a drive wheel starts to spin, ATC applies air
pressure to brake the wheel. This transfers engine torque to the wheels with better traction.
• If all drive wheels spin, ATC reduces engine
torque to provide improved traction.
ATC turns itself on and off. Drivers do not have to
select this feature. If drive wheels spin during acceleration, the WHEEL SPIN indicator comes on, indicating ATC is active. It goes out when the drive
wheels stop spinning.
Hydraulic Brake System
General Information
The hydraulic brake system includes a power
booster, master cylinder, reservoir, hydraulic lines, a
brake rotor on each wheel hub, and a brake caliper
and pad assembly at each rotor.
IMPORTANT: Make sure that the fluid level in
the master cylinder reservoir is up to the ridge
that surrounds the reservoir. See Fig. 9.5. Use
only heavy-duty brake fluid, DOT 3, in the hydraulic brake system.
9.6
Steering and Brake Systems
push the clutch pedal in, and shift the transmission
into Neutral. Apply the parking brake if the vehicle is
to be parked.
A
Meritor™ WABCO® Antilock Braking
System (ABS) for Hydraulic Brakes
The Meritor WABCO Antilock Braking System (ABS)
is an electronic wheel-speed monitoring and control
system that works with the hydraulic brake system.
ABS passively monitors vehicle wheel speed at all
times, but controls wheel speed during an emergency or reduced-traction stop. In normal braking
applications, the standard hydraulic brake system is
in effect.
B
f460513a
10/31/94
A. Open caps and check fluid level.
B. Fill to this level.
Fig. 9.5, Hydraulic Brake Reservoir
The master cylinder controls braking power to the
front and rear brakes. The Bendix Hydro-Max® power
booster is attached to the rear of the master cylinder
and is connected to the power steering system
(which provides pressurized power steering fluid). An
electrically powered backup pump operates if there is
inadequate fluid flow from the power steering pump
to the power booster. The brake system warning light
comes on if there is a problem within the system.
Bring the vehicle to a safe stop and correct the problem before continuing operation of the vehicle. See
Group 42 of the Business Class® M2 Workshop
Manual for hydraulic brake system troubleshooting
and adjustment procedures.
Operation
Before driving the vehicle, secure all loose items in
the cab so that they will not fly forward during a full
brake application. Make sure that all occupants are
wearing seat belts. Check that the brake system
warning light is off after releasing the parking brake.
If the warning light does not go off, correct the problem before continuing operation of the vehicle.
During normal brake stops, depress the foot brake
control pedal until braking action slows down the vehicle. Increase or decrease the pressure on the
pedal so that the vehicle comes to a smooth, safe
stop. When the forward speed of the vehicle has decreased to almost the idling speed of the engine,
9.7
IMPORTANT: For proper hydraulic ABS operation, Meritor WABCO recommends that front
and rear tire sizes be within 16% of each other.
Contact the Meritor WABCO Customer Support
Center at 800-535-5560 if you plan a tire size
difference greater than ±8%. Installing different
sized tires could result in inaccurate wheel
speed signals to the ECU resulting in a reduced
braking force, which could lead to longer stopping distances.
ABS includes signal-generating tone rings and sensors located in the wheel hubs of each sensed axle.
The sensors transmit vehicle wheel speed information to the ECU which interprets these signals to calculate wheel speed and a vehicle reference speed. If
the calculations indicate wheel lockup, the appropriate control circuit signals the brake pressure modulator to increase or decrease braking pressure.
CAUTION
An accumulation of road salt, dirt, or debris on
the ABS tone wheels and sensors can cause the
ABS warning light to come on. If the ABS light
does come on, the tone rings and sensors
should be inspected for corrosion and serviced if
necessary. The service should include cleaning
of the tone rings and sensors. If any tone ring on
a vehicle shows severe corrosion, all tone rings
on that vehicle should be replaced.
During winter months in areas where corrosive
materials are used on the highways, periodically
clean the underside of the vehicle, including the
tone rings and sensors, to ensure proper ABS
Steering and Brake Systems
function and to protect the components from corrosion. Clean more frequently when unusually
corrosive chemicals are being used.
The ECU also has a safety circuit that constantly
monitors the wheel sensors, brake pressure modulator, and the electrical circuitry. The ABS indicator
lamp comes on after the ignition is switched on and
will go out within three seconds if the system is functioning correctly. If the ABS indicator lamp does not
come on, or does not go out after three seconds,
have the vehicle serviced before operation.
If, during vehicle operation, the safety circuit senses
a failure in any part of the ABS system (a sensor,
brake pressure modulator, wiring connection, short
circuit, etc.), the warning lamp comes on and the
control circuit where the failure occurred is switched
to normal braking action. Even if the ABS system is
partially or completely inoperative, normal braking
ability is maintained. An exception would be if the
brake pressure modulator or a hydraulic fluid line is
damaged. Since these components are an integral
part of the hydraulic brake system, normal braking
may be impaired or inoperative.
IMPORTANT: If any of the ABS warning lights
do not work as described above, or come on
while driving, repair the ABS system immediately to ensure full antilock braking capability.
During emergency or reduced-traction stops, fully
depress the brake pedal until the vehicle comes to a
safe stop; do not pump the brake pedal. With the
brake pedal fully depressed, the ABS system will
control all wheels to provide steering control and a
reduced braking distance.
Although the ABS system improves vehicle control
during emergency braking situations, the driver still
has the responsibility to change driving styles depending on the existing traffic and road conditions.
For example, the ABS system cannot prevent an accident if the driver is speeding or following too close
on slippery road surfaces.
9.8
10
Fifth Wheels and Trailer
Couplings
Fifth
Fifth
Fifth
Fifth
Wheels, General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Uncoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Slide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.1
10.1
10.4
10.7
Fifth Wheels and Trailer Couplings
Fifth Wheels, General
Information
Fifth Wheel Lubrication
WARNING
WARNING
Do not use any fifth wheel that fails to operate
properly. Doing so may cause loss of vehicle
control, possibly resulting in severe personal injury or death.
Air-Suspension Dump Valve
The air-suspension dump valve may be used to adjust the tractor height to aid with coupling to or uncoupling from a trailer. See Fig. 10.1. When the
switch is set to LOWER, the air-suspension dump
valve deflates the air springs to lower the rear of the
vehicle. In the AUTO position, the automatic ridecontrol valves operate for normal driving.
WARNING
Keep the fifth wheel plate lubricated to prevent
binding between the tractor and trailer. A binding
fifth wheel could cause erratic steering and loss
of vehicle control, possibly resulting in personal
injury or death.
The standard fifth wheel plate must be kept well lubricated with chassis grease to prevent friction and
binding between the tractor fifth wheel plate and the
trailer.
For a low-lube fifth wheel plate, inspect the condition
of the low-lube pads. There should be no damaged
or missing pieces. Slight puckering at the outside
edges is normal.
For lubrication instructions, see Group 31 of the
Business Class M2 Maintenance Manual.
Fifth Wheel Coupling
Never exhaust air from the suspension while
driving. The suspension will not absorb road
shocks, possibly damaging components, and vehicle handling may be compromised. This could
result in loss of vehicle control, possibly resulting in severe personal injury or death.
Fifth wheel coupling is activated with the lock control
handle located on either the right side or left side of
the fifth wheel. Coupling has successfully occurred
when the kingpin has been forced into the jaws and
the lock control handle has moved to the locked
position.
NOTICE
NOTICE
Do not operate the vehicle over uneven ground
such as ramps, speed bumps, curbs, etc. with
the air springs deflated. Doing this may lead to
air bag separation from the piston, preventing the
suspension air springs from inflating.
Fontaine and Holland Fifth Wheels
Coupling
DO NOT LOWER
WHEN VEHICLE
IS IN MOTION
SUSP
AIR
1.
Chock the front and rear of the trailer tires to
prevent the trailer from moving.
LOWER
AUTO
2.
Ensure the fifth wheel jaw is fully open and the
operating rod is in the unlocked position. See
Fig. 10.2 or Fig. 10.3.
3.
Make sure the fifth wheel top plate is tilted so the
ramps are as low as possible.
10/25/2010
Fig. 10.1, Air-Suspension Dump Valve
10.1
Some fifth wheels may be mounted on sliding
rails. Before attempting to couple a trailer to a
sliding fifth wheel, the slide feature must be
locked to prevent the top plate from sliding rapidly forward or rearward, causing damage to the
fifth wheel or kingpin.
f611101
Fifth Wheels and Trailer Couplings
1
1
2
A
2
1
1
3
B
2
f310110a
10/26/2010
NOTE: Make sure the safety latch is down when the
control handle is locked.
A. Unlocked
1. Safety Latch
B. Locked
2. Lock Control Handle
Fig. 10.2, Fontaine Locking Mechanism
4.
f310447
11/02/2010
1. Safety Latch
2. Operating Rod (locked)
3. Operating Rod (unlocked)
Fig. 10.3, Holland Simplex SE Locking Mechanism
Position the tractor so that the center of the fifth
wheel is in line with the trailer kingpin. The kingpin should be in a position to enter the throat of
the locking mechanism.
D
C
A
NOTICE
Attempting to couple at the wrong height may
cause improper coupling, which could result in
damage to the fifth wheel or kingpin.
5.
Adjust the trailer height if required.
For a standard fifth wheel plate, the trailer
should contact the fifth wheel approximately 4 to
8 inches (10 to 20 cm) behind the fifth wheel
pivot. See Fig. 10.4.
For a low-lube fifth wheel plate, the fifth wheel
must slide freely under the trailer, and the trailer
should contact the fifth wheel at the pivot. See
Fig. 10.5.
6.
With the fifth wheel lock opening aligned with the
trailer kingpin, back the tractor slowly toward the
trailer. After sliding under the trailer, STOP to
B
10/28/2010
A. Fifth wheel must lift
trailer
B. Adjust trailer height
f311124
C. Ramps tilted down
D. 4 to 8 inches
Fig. 10.4, Trailer Connection Point, Standard Fifth
Wheel
prevent from hitting the kingpin too hard, then
resume backing slowly until the fifth wheel locks.
On a standard fifth wheel, the fifth wheel must lift
the trailer.
On a low-lube fifth wheel, do not lift the trailer as
this may damage the fifth wheel plate.
10.2
Fifth Wheels and Trailer Couplings
B
A
B
09/10/2010
f311126
A. No gap between trailer
and fifth wheel
B. Kingpin inside lock
A
Fig. 10.6, Coupling Inspection
09/10/2010
f311125
A. Adjust trailer height
Fig. 10.5, Trailer Connection Point, Low-Lube Fifth
Wheel
7.
Apply the tractor parking brakes.
WARNING
A visual inspection is required by law. Some improper couplings can pass a pull test. Sound is
not reliable. Get out of the cab and look. Incorrect coupling could cause the trailer to disconnect, possibly resulting in serious personal injury
or death.
8.
Perform a coupling inspection, checking that
there is no gap between the bottom of the trailer
and the fifth wheel, and that the kingpin is securely locked. See Fig. 10.6
When lockup has occurred, the fifth wheel control handle moves to the locked position. Make
sure that the safety latch is down over the lock
control handle to hold the control handle in the
locked position. (The safety latch will only rotate
down if the operating rod is fully retracted in the
locked position.) See Fig. 10.2 for Fontaine fifth
wheels. See Fig. 10.3 for Holland fifth wheels.
9.
NOTICE
B. Ramps tilted down
Release the tractor parking brakes. Test for kingpin lockup slowly inching the tractor forward, pulling on the trailer against the chocks.
Always make sure the connection hanger keeps
the trailer air hoses and electrical cables positioned so that they do not rub on anything. Rubbing may wear through hoses or cables, resulting
in air leaks, or exposed or broken wires, potentially affecting trailer brake or electrical systems.
11. Charge the air brake system with air, checking
that the air connections do not leak.
WARNING
Incorrect fifth wheel lock adjustment could cause
the trailer to disconnect, possibly resulting in serious personal injury or death.
12. With the trailer wheels chocked and the brakes
set, check for clearance between the kingpin and
the fifth wheel jaws by moving the tractor forward
and backward against the locked kingpin. If slack
is present, uncouple the trailer and have the fifth
wheel inspected and adjusted by a certified
technician.
Jost Fifth Wheel Coupling
1.
Tilt the ramp down.
2.
Open the kingpin locks. See Fig. 10.7.
3.
Back the vehicle close to the trailer, centering the
kingpin on the fifth wheel.
4.
Chock the trailer wheels.
5.
Connect the air lines and electrical cable.
6.
Ensure that the red trailer air supply valve (trailer
brake) is pulled out, and that the trailer parking
10. After lockup is completed, connect the tractor-to-
trailer air system lines and the electrical cable to
the trailer. Take care to prevent dirt or foreign
material from entering the air system lines.
10.3
Fifth Wheels and Trailer Couplings
nect, possibly resulting in serious personal injury
or death.
10. Apply the tractor parking brake, then perform a
A
physical check for positive kingpin lockup, and
that there is no gap between the trailer and the
fifth wheel. See Fig. 10.6.
11. Ensure that the release handle is in the locked
position adjacent to the casting. See Fig. 10.8.
12. Release the tractor parking brakes and test for
09/10/2010
A. Lock held open by catch mechanism
Fig. 10.7, Jost Release Handle Unlocked
brakes are set. See Chapter 5 in this manual for
operation of the dash-mounted brake controls.
2.
Chock the trailer rear wheels.
3.
Lower the trailer landing gear until the weight is
removed from the fifth wheel.
4.
Disconnect the tractor-to-trailer air system lines
and electrical cable. Plug the air lines to prevent
dirt or foreign material from entering the lines.
For a standard fifth wheel plate, the trailer
should contact the fifth wheel approximately 4 to
8 inches (10 to 20 cm) behind the pivot. See
Fig. 10.4.
5.
Verify that both the yellow parking-brake and red
trailer-air-supply knobs are out, the tractor and
trailer parking brakes are set, and that the trailer
is prepared for uncoupling.
For a low-lube fifth wheel plate, the fifth wheel
must slide freely under the trailer, and the trailer
should contact the fifth wheel at the pivot. See
Fig. 10.5.
6.
Release the kingpin locking mechanism following
the instructions for each manufacturer below.
Adjust the trailer height (if required).
6.1
Fontaine: Lift the safety latch and pull the
lock control handle to the unlocked position. See Fig. 10.2.
6.2
Holland: In the locked position the safety
indicator swings freely over the operating
rod. See Fig. 10.9, View A.
Back the tractor under the trailer.
On a standard fifth wheel, the fifth wheel must lift
the trailer.
On a low-lube fifth wheel, do not lift the trailer as
this may damage the fifth wheel plate.
9.
Manual Uncoupling
Apply the tractor and trailer parking brakes.
Attempting to couple at the wrong height may
cause improper coupling, which could result in
damage to the fifth wheel or kingpin.
8.
Fifth Wheel Uncoupling
1.
NOTICE
7.
kingpin lockup by slowly moving the tractor forward, pulling on the trailer against the chocks.
f311128
After sliding under the trailer, STOP to prevent
from hitting the kingpin too hard, then resume
backing slowly until the fifth wheel locks.
WARNING
A visual inspection is required by law. Some improper couplings can pass a pull test. Sound is
not reliable. Get out of the cab and look. Incorrect coupling could cause the trailer to discon-
To unlock the mechanism, manually rotate
the safety indicator toward the rear of the
fifth wheel. See Fig. 10.9, View B.
Pull the operating rod out. When the
upper operating rod shoulder is outside
the slot, raise the handle and place the
shoulder of the upper rod against the plate
casting, above the slot. See Fig. 10.9,
View C.
10.4
Fifth Wheels and Trailer Couplings
OK
OK
09/10/2010
f311127
Fig. 10.8, Jost Release Handle Locked
The fifth wheel is now in the lockset position and is ready for uncoupling. As the
tractor pulls away from the trailer the kingpin forces the jaw to rotate, contacting the
lock. Continued rotation of the jaw forces
the lock to move outward, and drops the
upper rod back into the slot. See Fig. 10.9
View D. The wheel is now ready for
coupling.
6.3
7.
Jost: Pull the retractable handle out, then
secure it in the open position with the
catch. See Fig. 10.7.
Release the tractor parking brake then drive out
slowly, allowing the trailer to slide down the fifth
wheel and pick-up ramps.
been uncoupled and coupled again. Failure to do
so may result in separation of the trailer from the
tractor, possibly causing serious personal injury
or death.
Preparing the Trailer for Uncoupling
Before using the air valve to unlock a fifth wheel
kingpin, prepare the trailer as follows.
1.
Apply the tractor and trailer parking brakes.
2.
Chock the trailer rear wheels.
3.
Lower the trailer landing gear until the weight is
removed from the fifth wheel.
4.
Disconnect the tractor-to-trailer air lines and electrical cable. Plug the air lines to prevent dirt or
foreign material from entering the lines.
Air-Actuated Uncoupling
An air-actuated kingpin release valve is optional with
all fifth wheels. See Fig. 10.10.
Fontaine and Holland Fifth Wheels AirActivated Kingpin Unlock
NOTE: In the event of an air system failure, airactuated kingpins can be manually released following the instructions for manual unlocking.
1.
WARNING
Once the kingpin release valve has been pulled
the kingpin lock is released. The vehicle MUST
NOT be driven with the trailer until the trailer has
10.5
Verify that both the yellow parking-brake and red
trailer-air supply knobs are out, the tractor and
trailer parking brakes are set, and that the trailer
is prepared for uncoupling.
NOTE: On Fontaine and Holland fifth wheels, if
the tractor parking brake is not set, the airactuated kingpin-release valve will not activate.
Fifth Wheels and Trailer Couplings
3
1
A
4
C
2
B
D
11/02/2010
f311133
A. Locked Position
B. Unlatched Position (safety indicator rotated towards the
rear of the fifth wheel)
1. Safety Indicator
2. Operating Rod
C. Lockset Position (upper rod resting against casting
above slot)
D. Open Position (ready for recoupling)
3. Upper Rod
4. Plate Casting
Fig. 10.9, Holland Kingpin Locking Mechanism
2.
Pull and hold the kingpin release valve until the
kingpin lock mechanism opens and locks in
place. See Fig. 10.10.
3.
Release the pull valve.
4.
Release the tractor parking brake.
5.
Drive out from under the trailer.
Jost Fifth Wheels Air-Activated Kingpin
Unlock
1.
Verify that both the yellow parking-brake and red
trailer-air-supply knobs are out, the tractor and
trailer parking brakes are set, and that the trailer
is prepared for uncoupling.
10.6
Fifth Wheels and Trailer Couplings
The maximum axle weight ratings are shown on the
Federal Motor Vehicle Safety Standard (FMVSS)
label or Canadian Motor Vehicle Safety Standard
(CMVSS) label attached to the left rear door post of
the tractor. The desired load on the axle is no less
than 80 percent of the maximum axle weight rating,
but in no instances should the axle load exceed the
maximum axle weight rating given on the FMVSS or
CMVSS label.
Manual Slide Operation
10/26/2010
f611102
The manual slide feature is operated from the fifth
wheel plate with a manual release handle using the
following procedure. See Fig. 10.11.
Fig. 10.10, Air-Actuated Kingpin Release Valve
1
NOTE: With Jost fifth wheels, if the trailer parking brake is not set the air-actuated valve will
not activate.
2.
Release the tractor parking brake.
3.
Pull and hold the kingpin release valve, then
drive forward slowly.
4.
After the trailer has slid down the fifth wheel and
pick-up ramps, release the pull valve.
Fifth Wheel Slide
WARNING
Adjust the fifth wheel slide correctly, and do not
overload any tractor axle by incorrectly loading
the trailer. Incorrect slide adjustment or improper
axle loading could cause erratic steering and
loss of vehicle control, possibly resulting in serious personal injury or death.
On sliding fifth wheel assemblies, the fifth-wheel
plate is attached to rails that allow forward and rearward movement of the fifth wheel to optimally distribute the load across the axles. Slots are evenly
spaced along the slide rails, and retractable wedges
are positioned through the slots to hold the fifth
wheel in the desired position.
The amount of load distribution on the front steering
axle and rear drive axle(s) will have a direct effect on
the steering control of the vehicle. Determine the
front and rear axle weights by weighing the vehicle
on scales designed for this purpose.
10.7
2
07/25/95
f310190
1. Locking Wedge
2. Slide Release Pull Handle
Fig. 10.11, Manual Release Sliding Fifth Wheel
(Fontaine shown)
1.
Stop the tractor and trailer in a straight line on
level ground. Pull the red trailer air supply knob
to apply the trailer parking brakes.
2.
Apply the tractor parking brake, then release the
sliding mechanism using the appropriate method
for the fifth wheel manufacturer.
2.1
Fontaine: Lift the slide release pull handle
to disengage it from the guide plate. Then,
pull out the handle until it is in the unlocked position and can be positioned
against the guide plate to hold it out. The
Fifth Wheels and Trailer Couplings
handle will stay in the unlocked position
until it is manually disengaged from the
guide plate. See Fig. 10.12.
5.
Release the tractor parking brakes, then slowly
move the tractor forward or backward until the
fifth wheel is in the desired location.
NOTICE
When moving the fifth wheel to the desired position, be sure the trailer landing gear will not at
any time come in contact with the tractor frame
or other components. Make sure that the front of
the trailer will not come in contact with the rear
of the cab or with other components if they extend beyond the rear of the cab.
WARNING
10/26/2010
f310050
Fig. 10.12, Releasing the Sliding Fifth Wheel, (Fontaine)
2.2
Holland: Pull the operating rod out. Make
sure both side plungers have released.
See Fig. 10.13.
Check that the locking wedges have seated in the
slots. Failure to achieve complete lockup may
allow disengagement of the tractor from the
trailer, possibly resulting in serious personal injury or death.
6.
Apply the tractor parking brakes, then lock the
sliding member in position using one of the following methods:
6.1
Fontaine: Disengage the slide release
pull handle from the guide plate. The slide
release pull handle is spring-loaded in the
locked position and will seek the locked
position when disengaged from the guide
plate. After the slide release pull handle
returns to the fully locked position, visually
and physically check the locking wedges
to make sure they are fully inserted into
the slots in the slide rails. Make sure the
handle is locked in position against the
guide plate.
6.2
Holland: Raise the operating rod so that it
is free to move inward. Make sure that the
lock pins have seated in the base plate
rail holes and the operating rod moves
into the locked position.
5
4
6
3
8
3
2
7
1
10/26/2010
1.
2.
3.
4.
Baseplate
Bolted Stop
Baseplate Rail
Fifth Wheel Mount
f310445
5.
6.
7.
8.
Slider Saddle Plate
Safety Latch
Operating Rod
Operating Lever
Fig. 10.13, Sliding Fifth Wheel Manual Release,
(Holland Simplex)
3.
Lower the trailer landing gear just enough to remove the weight from the tractor.
4.
Chock the front and rear of the trailer tires to
prevent the trailer from moving.
NOTE: The fifth wheel may need to be moved
slightly to enable the locking wedges to enter
the fully locked position.
10.8
Fifth Wheels and Trailer Couplings
Air Slide Operation
The slide feature may be operated with an air switch
mounted in the dash, that operates an air cylinder
that locks and unlocks the slide. See Fig. 10.14.
MUST BE
LOCKED WHEN
VEHICLE IS IN
MOTION
UNLOCK
1
FIFTH
WHL
SLIDE
A
LOCK
10/22/2009
f611074
1. Fifth Wheel Air-Slide Switch
Fig. 10.14, Air-Slide Switch
1.
Set the air-slide switch to UNLOCK. See
Fig. 10.14
B
Ensure the locking plungers have released. See
Fig. 10.15.
09/10/2010
For Jost fifth wheels, the mechanism activates as
shown in Fig. 10.16.
1
f311131
A. Unlocked
B. Locked
Fig. 10.16, Jost Sliding Fifth Wheel
2.
Lower the trailer landing gear just enough to remove the weight from the tractor.
3.
Pull the red trailer-air-supply knob to set the
trailer-parking brakes.
4.
Slowly move the tractor forward or backward
until the fifth wheel is in the desired location.
NOTICE
Ensure the trailer landing gear does not come in
contact with the tractor frame or other components, and that the front of the trailer will not
come in contact with the rear of the cab or other
components if they extend beyond the rear of the
cab.
2
1. Locking Wedge
5.
2. Air Cylinder
Fig. 10.15, Air-Operated Sliding Fifth Wheel (Fontaine
shown)
10.9
Apply the tractor parking brakes.
f310189
07/25/95
WARNING
Check that the locking wedges have seated in the
slots. Failure to achieve complete lockup may
Fifth Wheels and Trailer Couplings
allow disengagement of the tractor from the
trailer, possibly resulting in serious personal injury or death.
6.
Set the air-slide switch to LOCK. Visually inspect
the locking wedges or plungers to make sure
that they are fully inserted in the slide rail slots.
Verify that the plungers have engaged by tugging
the tractor forward while the trailer brakes are
locked and the wheels are chocked.
NOTE: The fifth wheel may need to be moved
slightly to enable the locking wedges to fully
lock.
10.10
11
Pretrip and Post-Trip
Inspections and
Maintenance
Pretrip and Post-Trip Inspection Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1
Pretrip and Post-Trip Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.3
Pretrip and Post-Trip Inspections and Maintenance
Pretrip and Post-Trip
Inspection Checklists
Regulations in both Canada and the United States
clearly indicate that it is the driver’s responsibility to
perform an inspection and ensure the complete roadworthiness of a vehicle before placing it into service
for the day. Commercial vehicles may be subject to
inspection by authorized inspectors, and an unsafe
vehicle can be put "out of service" until the driver or
owner repairs it.
IMPORTANT: The pre- and post-trip checklists,
and inspections and maintenance procedures
detailed in this chapter, are not all-inclusive.
Also refer to other component and body manufacturers’ instructions for specific inspection and
maintenance instructions.
Use the inspection checklists to ensure that vehicle
components are in good working condition before
each trip. A driver that is familiar with the vehicle,
and drives it regularly, can perform the daily inspections, then add the weekly and monthly post-trip inspections as scheduled. If the driver does not operate the vehicle on a consistant basis, all three of the
inspection procedures should be performed before
the trip.
NOTE: Procedure reference numbers in the
checklists reference the corresponding detailed
instructions found under the pretrip and post-trip
maintenance procedures.
Pre- and post-trip inspections cannot be done
quickly. However, careful inspections save time by
eliminating stops later to adjust items overlooked or
forgotten.
If any system or component does not pass this inspection, it must be corrected before operating the
vehicle. Whenever equipment requires adjustment,
replacement, repair, addition of lubricants, or a
change of lubricants, see the Business Class® M2
Workshop Manualfor procedures and specifications,
and see the Business Class® M2 Maintenance Manualfor lubricant recommendations, specifications, and
maintenance intervals.
See Table 11.1 for a list of procedures that should
be perfomed daily, before the first trip.
11.1
See Table 11.2 for a list of procedures that should
be performed weekly, post-trip.
See Table 11.3 for a list of procedures that should
be performed monthly, post-trip.
IMPORTANT: Before performing any checks,
apply the parking brake and chock the tires.
Pretrip and Post-Trip Inspections and Maintenance
Procedure Performed
(check off)
_______
Check
Inspect
Check
Inspect
Check
Inspect
Inspect
Check
Check
Check
Inspect
Check
Inspect
Inspect
Inspect
Check
Check
Check
Check
Check
Check
Check
Check
Check
Check
Inspect
Inspect
Check
Inspect
Inspect
Inspect
Check
Check
Inspect
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
Check
_______
Check
_______
_______
Daily Pretrip Inspections/Checks
Drain manually drained air reservoirs (that are not equipped with automatic drain
valves)
windshield washer reservoir fluid
wheel seal and hub cap (for leakage)
surge tank coolant; and, if equipped, coolant for hybrid cooling system
radiator and charge air cooler
engine for fuel, oil, or coolant leaks
engine and chassis wiring
air intake system
intake-air restriction indicator mounted on air intake
engine oil level
power steering fluid level
fuel tank(s), fuel lines, connections, and fuel level
fuel/water separator
natural gas fuel system, if equipped
front and rear suspension components
headlights, mirrors, and window glass, and windshield wipers
doors (open without difficulty and close securely)
Adjust driver’s seat, then align rearview and downview mirrors
dash-mounted intake-air restriction indicator
oil- and air-pressure warning systems
ICU fault codes
horn, windshield wipers, and windshield washer
heater, defroster, and optional mirror heat controls
backup alarm
panel lights and interior lights
exterior lights and reflectors
tire pressure
tire condition
rims and wheels
automatic transmission fluid level
air brake chambers and pushrods
air brake lines
slack adjusters
air brake system operation
Bendix Hydro-Max® Power Booster, if equipped
frame rails (missing bolts) and crossmembers (bent or loose)
mud flaps (aren’t damaged, at least 10 inches above the ground, and brackets
are secure)
exhaust system (mounted securely, connected tightly, no signs of leaks such as
soot trails)
Remove chocks and test service brakes
Inspector___________________________________________________
Procedure
Reference
D1
D2
—
D3
D4
—
D5
D6
D6
D7
—
D8
D9
D10
D11
D12
—
—
D6
D13
D14
D15
D16
—
D17
D18
D19
D20
D21
—
D22
D23
D24
D25
D26
—
—
—
D27
Date ________________
Table 11.1, Daily Pretrip Inspection and Maintenance Checklist
11.2
Pretrip and Post-Trip Inspections and Maintenance
Procedure Performed
(check off)
_______
Inspect
_______
Check
_______
Inspect
_______
Check
_______
Check
_______
Inspect
_______
Weekly Post-Trip Inspections/Checks
Manually drain air reservoirs that are equipped with automatic drain valves
batteries and battery cables
wheel bearing lubricant level
steering components
serpentine drive belt condition
V-belt tension
seat belts and tether belts
Inspector___________________________________________________
Procedure
Reference
—
W1
W2
W3
W4
W5
W6
Date ________________
Table 11.2, Weekly Post-Trip Inspection and Maintenance Checklist
Procedure Performed
Monthly Post-Trip Inspections/Checks
(check off)
_______ clean the battery terminals
Inspect
_______ radiator hoses and heater hoses
fluid level in the hydraulic clutch reservoir (if applicable, and if necessary, fill with
Check
_______
DOT 4 brake fluid)
Check
_______ steering wheel play
Check
_______ outer surfaces of the hood and body (for visible surface breaks and damage)
Check
_______ hood tilt damper (attached at both ends)
Inspect
_______ brake lining wear
Inspect
_______ driveshaft
Inspect
_______ natural gas fuel system leak test, if equipped
_______ drain the CNG high-pressure fuel filter housing, if equipped
Inspector___________________________________________________
Procedure
Reference
M1
M2
—
M3
—
—
M4
—
M5
M6
Date ________________
Table 11.3, Monthly Post-Trip Inspection and Maintenance Checklist
Pretrip and Post-Trip
Maintenance Procedures
1.1
Daily Pretrip Inspection and
Maintenance
Whenever equipment requires adjustment, replacement, and/or repair, see the Business Class® M2
Workshop Manual for procedures and specifications.
Specific references to the manual will be found
where appropriate.
1.
Drain manually drained air reservoirs.
Water and oil normally enter the air reservoir in
the form of vapor because of the heat generated
during compression. After the water and oil condense, drain the resulting emulsion as follows:
11.3
Open the wet tank valve. The drain cock
or pull chain drain is located on the forward end of the supply air reservoir, which
is connected directly to the air compressor. Block the valve open.
WARNING
When draining the air reservoir, do not look into
the air jets or direct them toward anyone. Dirt or
sludge particles may be in the airstream and
could cause injury.
1.2
Exhaust the remaining air and moisture
from the system by opening the drain
cocks on the bottoms of the remaining air
reservoirs. Block the valves open.
Pretrip and Post-Trip Inspections and Maintenance
2.
1.3
Water and oil emulsion often form pockets
that will not drain while compressed air is
in the reservoirs. Because of these pockets, leave the valves blocked open during
the first part of the pretrip inspection.
1.4
If the drained water is cloudy or oily, it
may indicate a problem with the compressor. If oil is allowed to contaminate the air
dryer, it will not remove the water from the
air brake system, which could adversely
affect braking.
Check the fluid level in the windshield washer
reservoir.
11/02/2001
Add coolant here (arrow).
Add washer fluid as needed. Unscrew the cap to
add fluid.
Fig. 11.1, Coolant Level Checking
4.1
Inspect the radiator and charge air cooler
for clogged fins. Use compressed air or
water directed from the fan side of the
core to backflush any material restricting
airflow.
4.2
Inspect the radiator and charge air cooler
for damage and accumulated debris.
Straighten bent or damaged fins to permit
airflow across all areas of the cores.
WARNING
Washer fluids may be flammable and poisonous.
Do not expose washer fluid to an open flame or
any burning material, such as a cigarette. Always
comply with the washer fluid manufacturer’s recommended safety precautions.
3.
Check the engine coolant levels in the radiator
surge tank, and, if equipped, the reservoir for the
hybrid cooling system.
NOTE: When traveling through areas of high
insect concentration, it may be necessary to
clean the exterior of the radiator or the
charge air cooler core as often as every 200
miles (320 km).
See Fig. 11.1. If the coolant is low, add a 50/50
mixture of water and the type of antifreeze specified for your vehicle. Fill the surge tank with coolant to the MAX line when the tank is cool. If the
surge tank was empty, start the engine after refilling and check the level again when the engine
is at operating temperature.
For natural gas vehicles, use only Fleetguard ES
Compleat™ EG Premix 50/50 engine coolant.
For vehicles equipped with a hybrid cooling system, the coolant should be approximately 1.5
inches (4 cm) below the top of the reservoir for
this system. If the coolant is low, add a 50/50
mixture of water and the type of antifreeze specified for your vehicle.
5.
4.
Inspect the radiator and charge air cooler.
4.3
On vehicles equipped with air conditioning, also inspect and clean the condenser.
If clogged, the condenser can restrict airflow through the radiator.
4.4
Check the radiator for leaks. If leaks are
found, have the radiator repaired or replaced. See Group 20 of the Business
Class® M2 Workshop Manual for instructions, or take the vehicle to an authorized
Freightliner dealer.
Inspect the engine and chassis wiring.
Check for loose wiring, chafed insulation, and
damaged or loose hold-down clamps. Tighten
loose wires or hold-down clamps; replace damaged wiring or clamps.
CAUTION
Coolant must be filled to the full line of the surge
tank. Low coolant could result in engine overheating, which could cause engine damage.
f820382
6.
Inspect the air intake system for leaks or damage.
11.4
Pretrip and Post-Trip Inspections and Maintenance
clogged or dirty. This element should be
replaced with every third primary element
replacement.
CAUTION
Failure to maintain a sealed air intake system
could allow the entry of dirt and contaminants
into the engine. This could adversely affect engine performance and result in engine damage.
6.1
Check the intake-air restriction indicator (if
mounted in the air intake system).
6.2
Replace the primary filter element in the
air cleaner (see Fig. 11.2) if the yellow
signal stays locked at 25 inH2O for Caterpillar engines or 20 inH2O for MercedesBenz engines. See Group 09 of the
Business Class® M2 Workshop Manual for
filter element replacement instructions.
6.4
7.
Check the engine air intake piping from
the air cleaner to the engine intake. Inspect the piping for loose connections,
cracks, torn or collapsed hoses, punctures, and other damage. Tighten loose
connections, and have damaged components replaced. Make sure the piping system is airtight so that all of the intake air
passes through the air cleaner.
Check the engine oil level.
If the oil level is at or below the minimum fill (or
"add") mark on the dipstick, add enough oil to
maintain the level between the minimum fill (or
"add") and the maximum fill (or "full") marks on
the dipstick. See Fig. 11.3. Engine lube oil must
have a sulfated ash level less than 1.0 wt %;
currently referred to as CJ-4 oil. Use the proper
SAE viscosity rating for the temperature and time
of year.
For natural gas vehicles, use only Exxon Busgard® Geo 15W-40 natural gas engine oil. Busgard Geo engine oil with an SAE grade of
15W-40 has multiple benefits in natural gas vehicles, including improved cold-weather starting
and pumping, and reduced oil consumption.
1
2
1
2
01/13/99
f011525
NOTE: The MBE900 dipstick is shown.
1. Maximum Fill Level
2. Minimum Fill Level
09/12/2001
f090363
Fig. 11.3, Checking Engine Oil Level
1. Primary Filter Element
2. Secondary or Safety Filter Element
CAUTION
Fig. 11.2, Air Cleaner Filter Elements
NOTE: After replacing the filter element,
reset the restriction indicator by pressing the
rubber reset button.
6.3
11.5
Inspect the secondary or safety filter element in the air cleaner when replacing the
primary element, and replace it when
Operating the engine with the oil level below the
minimum fill (or "add") mark or above the maximum fill (or "full") mark could result in engine
damage.
8.
Inspect the fuel tanks, fuel lines, and connections
for leaks, and check the fuel level in the fuel
tank(s).
Pretrip and Post-Trip Inspections and Maintenance
8.1
Check that the fuel tanks are secured to
their mounting brackets and that the
mounting brackets are secured to the
frame.
8.2
Replace leaking fuel tanks.
8.3
If lines or connections are leaking, have
them repaired or replaced.
For repair and/or replacement procedures,
see Group 47 of the Business Class® M2
Workshop Manual, or take the vehicle in
to an authorized Freightliner dealer.
8.4
If equipped with fuel tank shutoff valves,
be sure the valves are fully open.
WARNING
Never operate the engine with the fuel tank shutoff valves partly closed. This could damage the
fuel pump, causing loss of engine power and reduced vehicle control.
8.5
Before installing the fuel cap, clean the
area with a rag, or if necessary, clean the
cap with solvent.
8.8
If needed, prime the fuel system. For
priming procedures, see the applicable
engine manufacturer’s manual.
If equipped with a fuel/water separator, check for
water. Drain any water found. Check the fuel/
water separator for leaks and contaminants.
9.1
Place a suitable container under the fuel/
water separator.
9.2
Check the water level in the sight bowl, if
equipped, and loosen the filter vent at the
top of the separator.
9.3
Drain the water by loosening the valve at
the bottom and allowing the water to run
out. Close and tighten the valve fingertight.
9.4
Close and tighten the filter vent at the top
of the separator.
Check the fuel level in the fuel tank(s).
To keep condensation to a minimum, fuel
tanks should be filled at the end of each
day. Federal regulations prohibit filling a
fuel tank to more than 95 percent of its
liquid capacity.
WARNING
Do not mix gasoline or alcohol with diesel fuel.
This mixture could cause an explosion, possibly
resulting in serious personal injury or death. Do
not fill the fuel tanks in the presence of sparks,
open flames, or intense heat. These could ignite
the fuel, possibly causing severe burns.
IMPORTANT: Use ultralow-sulfur diesel
(ULSD) with 15 ppm sulfur content or less,
based on ASTM D2622 test procedure. Failure to use ultralow-sulfur diesel fuels may
void the warranty on emission components.
8.6
9.
8.7
Fuel should always be strained or filtered
before being put into the tanks. This will
lengthen the life of the engine fuel filter
and reduce the chances of dirt getting into
the engine.
IMPORTANT: When draining fluid from a fuel/
water separator, drain the fluid into an appropriate container and dispose of it properly. Many
states now issue fines for draining fuel/water
separators onto the ground. On all types of
separators, stop draining fluid when you see
fuel come out of the separator drain valve.
10. Inspect all natural gas fuel system components,
if equipped, for damage or leaks. Replace components as necessary.
10.1
Inspect fuel tanks for dents, scratches,
gouges, or other signs of damage. Inspect
the fuel lines and connections for leaks.
10.2
Check that the fuel tanks are securely
mounted. Look for signs of abrasion between components.
CNG Fuel System: Ensure that the CNG
fuel cylinder storage box is secured to the
frame. Inspect for any signs of looseness.
LNG Fuel System: Ensure that the LNG
fuel tank is secured to the mounting
brackets and that the mounting brackets
are secured to the frame. Inspect for any
11.6
Pretrip and Post-Trip Inspections and Maintenance
signs of looseness. Ensure all rubber isolator straps are secure around the LNG
fuel tank.
10.3
Check for the presence of all required decals. Natural gas decals should be present
in the following locations:
7
8
9
6
10
5
11
• Left front bumper
12
• End-of-frame crossmember
• LNG fuel tank fill port (maximum
psi), if equipped
10.4
Check for the presence of all necessary
vent caps on pressure relief valves and
devices.
CNG Fuel System: Check for the presence of blue caps on all pressure relief
devices. Each fuel cylinder is equipped
with two caps (one on each end), which
are visible on the back of the CNG fuel
cylinder storage box. One cap is located
on the pressure relief valve on the inboard
side of the CNG fuel box, next to the fuel
outlet line. If any blue caps are missing,
remove the vehicle from service and have
the fuel system inspected by a qualified
technician.
LNG Fuel System: Check for the presence
of a red cap on the secondary relief valve.
If the red vinyl cap is missing from the
secondary relief valve (Fig. 11.4, Item 4),
remove the vehicle from service and have
the fuel system inspected by a qualified
technician.
10.5
Inspect all plumbing components, including the fuel shutoff valve(s), primary and
secondary relief valves, and the LNG
vapor shutoff and excess flow valves, if
equipped, for signs of damage or leaks.
See Fig. 11.4 or Fig. 11.5.
4
3
2
1
05/05/2010
1. Pressure Control
Regulator
2. Vapor Shutoff Valve
3. Fuel Fill Hose
4. Secondary Relief
Valve (red cap)
5. Fuel Fill Fitting
6. Fuel Level Sender
Box
11.7
Primary Relief Valve
Tank Pressure Gauge
Fill Vent Fitting
Excess Flow Valve
Fuel Shutoff Valve
(liquid)
12. Fill Check Valve
10.7
Inspect all coolant hoses for signs of chafing, kinks, or leaks. The LNG fuel system
utilizes coolant hoses between the engine
and the vaporizer, while the CNG fuel system utilizes coolant hoses between the
engine and the pressure regulator inside
the fuel panel.
10.8
If equipped with an LNG fuel system,
check the LNG fuel tank pressure gauge
to ensure that pressure is within the normal range of 120 to 150 psi (827 to 1034
kPa). In the unlikely event that tank pressure exceeds 230 psi (1586 kPa) and the
pressure relief valve does not open automatically, vent the tank immediately.
10.9
Inspect the LNG vaporizer, if equipped, for
signs of damage or leaks. See Fig. 11.6.
Inspect all lines for signs of leaks or damage, and check all threaded connections.
Inspect all fuel gauge components for
signs of leaks or damage. Inspect the
LNG fuel level sender cable and wiring, if
equipped.
7.
8.
9.
10.
11.
Fig. 11.4, LNG Tank Plumbing Components
Inspect the fuel fill fitting for signs of damage or leaks.
10.6
f470533
Inspect the vaporizer mounting brackets
for signs of looseness.
Pretrip and Post-Trip Inspections and Maintenance
2
1
components do not have adequate gripping surfaces and handholds.
Check the condition of the windshield wiper arms
and blades.
H IG
H PRESS UR E
Be sure the windshield wiper blades are tensioned against the windshield.
RE
LOW PRES S U
CYLINDERS
INSPECT CYLINDERS
EVERY 36 MONTHS
OR 36000 MILES
WHICHEVER OCCURS FIRST
Inspect the wiper blades for damage and deteriorated rubber.
REGULATOR
INSPECT PRESSURE
RELIEF DEVICE
EVERY 2000 MILES
NATURAL
GAS
VEHICLE
110 PSIG
FILTER
ON
DRAIN HOUSING
EVERY 1500 MILES
REPLACE ELEMENT
EVERY 3000 MILES
3
OPEN VALVE
SLOWLY
M
SH AN
U U
VA T O AL
LV FF
E
3600 PSIG MAX.
SERVICE PRESSURE
Replace the wiper arms if the wiper blades are
not tensioned against the windshield.
4
Replace damaged or deteriorated wiper blades.
WARNING
04/30/2010
1.
2.
3.
4.
f470556
High Pressure Gauge
Low Pressure Gauge
Manual Fuel Shutoff Valve
Fuel Fill Port
Fig. 11.5, CNG Fuel Panel
10.10 Inspect the LNG vaporizer overpressure
regulator, if equipped, for signs of damage
or leaks.
11. Inspect the front and rear suspension compo-
nents, including springs, spring hangers, shocks,
and suspension brackets.
11.1
Check for broken spring leaves, loose
U-bolts, cracks in the suspension
brackets, and loose fasteners in the spring
hangers and shackles.
11.2
Inspect the shock absorbers for loose fasteners and leaks.
11.3
Tighten all loose fasteners and have any
component(s) replaced that are worn,
cracked, or otherwise damaged.
11.4
On vehicles with air suspensions, check
for leaks. Check air suspension components for cuts and bulges.
12. Clean the windshield, side, and rear windows
with a long-handled or telescoping window cleaning device and standard cleaning solutions.
Stand only on the ground, on a stepladder, or an
elevated walkway. The cab entry/exit steps and
handholds are not designed for this purpose. The
tires, fenders, engine, and other under-hood
When cleaning windshields and windows, always
stand on the ground or on a secure ladder or
platform. Use a long-handled window cleaner. Do
not use the cab steps, tires, fenders, fuel tanks,
engine, or under-hood components to access the
windshield or windows. Doing so could cause a
fall and result in an injury.
13. After starting the engine, make sure the oil- and
air-pressure warning systems are operating and
that the buzzer stops sounding when the preset
minimum is reached.
If the warning systems do not come on when the
ignition is turned on, have the systems repaired.
The air pressure in both the primary and secondary air reservoir systems must be above 65 psi
(448 kPa) on most vehicles. For vehicles with an
optional Bendix dryer reservoir module (DRM),
the cut-out pressure is 130 psi (896 kPa).
NOTE: If the air pressure in both systems is
above the preset minimum when the engine is
started, test the low air pressure warning system by lowering the pressure to below this
range, or until the warning system comes on.
14. Check the instrumentation control unit (ICU) for
fault codes.
During the ignition sequence, if an active fault is
detected in any device that is connected to the
ECU, the message display screen will show the
active fault codes, one after the other, until the
parking brake is released or the ignition switch is
turned off. See Chapter 2 for detailed operating
instructions for the ICU.
11.8
Pretrip and Post-Trip Inspections and Maintenance
8
9
5
1
12
10
11
7
06/29/2009
1.
2.
3.
4.
2
3
4
Pressure Relief Device
Fuel Inlet Line
Check Valve
CNG Quick-Connect Port
6
f470536
5.
6.
7.
8.
Coolant Inlet Line
Vaporizer
Fuel Shutoff Solenoid Valve
Coolant Outlet Line
9.
10.
11.
12.
Pressure Gauge
Overpressure Regulator
Pressure Relief Valve
Fuel Outlet Line
Fig. 11.6, LNG Vaporizer Assembly
15. Make sure that the horn, windshield wipers, and
windshield washers are operating properly.
These devices must be in good working order for
safe vehicle operation.
15.1
Make sure that the horn works. If a horn is
not working, have it repaired before trip
departure.
15.2
Check the wiper and washer control on
the multifunction turn signal switch. If the
wipers and/or washers are not working,
have them repaired before trip departure.
16. During cold weather, make sure the heater, de-
froster, and optional mirror heat controls are operating properly. If so equipped, turn on the mirror heat switch and make sure the system is
working.
11.9
17. Check the operation of all the panel lights and
interior lights.
Turn on the headlights, dash lights, and four-way
flashers and leave them on. If any of the gauge
bulbs, the dome light bulbs, or the right- and leftturn indicator bulbs are not working, replace
them.
18. Make sure all the exterior lights are working
properly.
Check that all the lights and reflectors are clean.
See Fig. 11.7.
18.1
Check that the brake lights, taillights,
headlights, parking lights, turn signals,
marker lights, identification lights, road
lights (if so equipped), and front clearance
lights are working properly and are clean.
Pretrip and Post-Trip Inspections and Maintenance
19.3
1
3
2
2
If a tire has been run flat or underinflated,
check the wheel for proper lockring and
side-ring seating, and possible wheel, rim,
or tire damage before adding air.
Moisture inside a tire can result in body
ply separation or a sidewall rupture. During tire inflation, compressed air reservoirs
and lines must be kept dry. Use wellmaintained inline moisture traps and service them regularly.
4
5
8
7
10/31/2001
8
6
f543920
NOTE: The parking lights, front clearance lights, and
taillights all function as turn signals.
1.
2.
3.
4.
Utility Light
Identification Light
Marker Lights
Front Clearance Light
5.
6.
7.
8.
Headlight Low Beam
Headlight High Beam
Parking Light
Road Light
Fig. 11.7, Exterior Lights
18.2
Test the high and low beams of the headlights.
18.3
Replace light bulbs or sealed beam units
that are not working.
18.4
Be sure all reflectors and lenses are in
good condition and are clean. Replace
any broken reflectors or lenses.
19. Check tire inflation pressures using an accurate
WARNING
Do not operate the vehicle with underinflated or
overinflated tires. Incorrect inflation can stress
the tires and make the tires and rims more susceptible to damage, possibly leading to rim or
tire failure and loss of vehicle control, resulting
in serious personal injury or death.
IMPORTANT: The load and cold inflation pressure must not exceed the rim or wheel manufacturer’s recommendations, even though the
tire may be approved for a higher load inflation.
Some rims and wheels are stamped with a
maximum load and maximum cold inflation rating. If they are not stamped, consult the rim or
wheel manufacturer for the correct tire inflation
pressure for the vehicle load. If the load exceeds the maximum rim or wheel capacity, the
load must be adjusted or reduced.
CAUTION
A weekly pressure loss of 4 psi (28 kPa) or more
in a tire may indicate damage. The tire should be
inspected and, if necessary, repaired or replaced.
20. Inspect each tire for wear, bulges, cracks, cuts,
tire pressure gauge.
penetrations, and oil contamination.
Tires should be checked when cool. For inflation
pressures and maximum loads (per tire) see the
tire manufacturer’s guidelines.
20.1
Check the tire tread depth. If tread is less
than 4/32 inch (3 mm) on any front tire, or
less than 2/32 inch (1.5 mm) on any rear
tire, replace the tire.
20.2
Inspect each tire for bulges, cracks, cuts,
and penetrations.
19.1
19.2
Be sure valve stem caps are on every tire
and that they are screwed on finger-tight.
Inflate the tires to the applicable pressures
if needed.
11.10
Pretrip and Post-Trip Inspections and Maintenance
20.3
Inspect each tire for oil contamination.
Fuel oil, gasoline, and other petroleum
derivatives, if allowed to contact the tires,
will soften the rubber and destroy the tire.
occur, possibly resulting in serious personal injury or death.
21.3
Have broken, cracked, badly worn, bent,
rusty, or sprung rings and rims replaced.
Be sure that the rim base, lockring, and
side ring are matched according to size
and type.
21.4
Make sure all wheel nuts are tightened
450 to 500 lbf·ft (610 to 678 N·m) for Accuride wheels with unlubricated threads.
Use the tightening pattern in Fig. 11.10 for
10-hole wheels and the tightening pattern
in Fig. 11.11 for 8-hole wheels. See
Group 40 of the Business Class® M2
Workshop Manual for more information.
21. Check the wheel nuts or rim nuts for indications
of looseness. Examine each rim and wheel component.
21.1
Remove all dirt and foreign material from
the assembly. Dirt or rust streaks from the
stud holes, metal buildup around stud
holes, or out-of-round or worn stud holes
may be caused by loose wheel nuts. See
Fig. 11.8 and Fig. 11.9.
NOTICE
Insufficient wheel nut torque can cause wheel
shimmy, resulting in wheel damage, stud breakage, and extreme tire tread wear. Excessive
wheel nut torque can break studs, damage
threads, and crack discs in the stud hole area.
Use the recommended torque values and follow
the proper tightening sequence.
f400058
02/09/95
Fig. 11.8, Dirt and Rust Streaks from the Stud Holes
21.2
Examine the rim and wheel assembly
components (including rims, rings, flanges,
studs, and nuts) for cracks, or other damage.
See Group 33 or Group 35 of the
Business Class® M2 Workshop Manual for
service procedures on the studs and hubs,
and see Group 40 in the same manual for
wheel and tire servicing, or take the vehicle to an authorized Freightliner dealer.
NOTE: Vehicles operating under severe or adverse conditions should be checked more frequently.
22. Inspect the air brake chamber and the air brake
chamber pushrods.
WARNING
Do not operate the vehicle with the front brakes
backed off or disconnected. Backing off or disconnecting the front brakes will not improve vehicle handling and may lead to loss of vehicle
control, resulting in property damage or personal
injury.
22.1
Check that the air brake chamber is
mounted securely on its mounting bracket,
and that there are no loose or missing
bolts.
22.2
Look for worn clevis pins on brake chamber pushrods and missing or damaged
cotter pins on brake chamber pushrod clevis pins. Replace worn clevis pins and install new cotter pins if necessary.
WARNING
Have any worn or damaged wheel components
replaced by a qualified person using the wheel
manufacturer’s instructions and the wheel industry’s standard safety precautions and equipment.
Otherwise a vehicle or workshop accident could
11.11
Pretrip and Post-Trip Inspections and Maintenance
02/09/95
f400001
Fig. 11.9, Worn Stud Holes
22.3
10
1
8
3
6
5
4
See if the chamber piston rod is in line
with the slack adjuster. Misalignment can
cause the piston rod to rub on the nonpressure chamber and cause a dragging
brake. See Group 42 of the Business
Class® M2 Workshop Manual.
CAUTION
7
9
2
f400081a
08/23/93
Fig. 11.10, Tightening Pattern, 10-Hole Wheels
If the external breather tube or breather cap is
missing or incorrectly installed, road dirt and debris can adversely affect the operation of the
brake chamber. Once inside of the chamber, dirt
and debris can cause the internal parts of the
chamber to deteriorate faster.
22.4
1
A
2
4
7
Inspect the exterior surfaces of the chamber for damage. Make sure that breather
holes in the non-pressure section(s) are
open and free of debris. See Group 42 of
the Business Class® M2 Workshop
Manual to replace any damaged parts.
DANGER
3
08/20/93
Do not loosen or remove the parking brake clamp
ring for any purpose. The parking/emergency
brake section of the brake chamber is not intended to be serviced. Serious injury or death
may result from sudden release of the power
spring.
6
5
8
f400052a
Fig. 11.11, Tightening Pattern, 8-Hole Wheels
11.12
Pretrip and Post-Trip Inspections and Maintenance
Before doing any repairs or adjustments on a
service/parking brake chamber, read the applicable warnings and instructions in Group 42 of
the Business Class® M2 Workshop Manual.
22.5
On all parking brake installations, make
sure the end cover cap or dust plug is securely snapped into place. See Fig. 11.12.
1
23.2
NOTE: Do not route the hose on top of anything likely to be stepped on.
23.3
Check for damage to hoses located near
moving parts, such as drivelines, kingpins,
suspensions, and axles. If moving parts
are catching or pinching the lines, correct
as needed.
23.4
Check for hose damage caused by abrasion. If abraded, have the hose replaced.
Check for the cause of abrasion, such as
loose or damaged hose clamps. Have the
clamps repaired or replaced as needed.
23.5
Observe the hose cover condition, especially hoses exposed to water splash and
ice. If dried out or ragged (the wire or liner
is showing through the cover), have the
hose(s) replaced.
23.6
Inspect the air tubing, especially tubing
made of nylon. In cold weather, nylon tubing is sensitive to damage, such as nicks
or cuts. Have nicked or cut tubing replaced, even if it is not leaking.
23.7
Check for kinked or twisted hoses. A
seven-percent twist in the hose can reduce its life by up to 90 percent. A twisted
hose under pressure tends to untwist,
which may loosen the fitting. Reconnect
hoses that are twisted.
A
f421352
02/22/2000
A. Do not remove this clamp ring.
1. MGM TR–T (TR Series) Brake Chamber shown
Fig. 11.12, Parking Brake Chamber Clamp
NOTE: On most MGM parking brake chambers equipped with an integral release bolt,
an end cover cap is installed over the release bolt.
22.6
Check for rusted connections, missing
snap rings, and damaged camshaft
grease seals. Have damaged or missing
parts repaired or replaced.
23. Inspect the air brake lines.
23.1
11.13
Check the clearance between the hoses
and the exhaust manifold or other hot
spots. Excessive heat will cause material
in the hoses to deteriorate rapidly or become brittle. Provide at least 6 inches
(150 mm) of clearance. More clearance is
recommended if the hose is located above
the heat source.
Check for kinks, dents, or swelling of the
hoses. If damaged, have the hose replaced with the same size and type.
NOTE: The front brake lines flex continuously in vehicle operation, so they require
special examination. Give particular attention
to the areas near where they connect to the
front air brake chambers. This inspection
requires two people, one in the driver seat
and another to inspect the brake line connections at the wheels.
23.8
Both wheel air lines must be inspected
with the emergency brake set, engine
idling, air pressure at 80 to 90 psi (550 to
620 kPa), and the brake pedal held down.
23.9
Turn the wheels to full lock in one direction and inspect both air lines where they
connect to the air chambers, then turn the
Pretrip and Post-Trip Inspections and Maintenance
wheels to full lock in the other direction
and inspect both lines. If a hose is leaking, have it replaced.
IMPORTANT: ABS-equipped vehicles operating in regions where especially corrosive
ice-removal chemicals are used may experience higher than normal rotor corrosion.
Tone rings should be routinely inspected for
corrosion. Severe corrosion of the integral
ABS tone ring may cause the ABS warning
lamp in the dash to illuminate due to false
wheel speed readings. If the ABS warning
lamp illuminates at any time other than at
vehicle start-up, have the problem repaired
immediately.
24. Inspect the slack adjusters.
24.1
Meritor Slack Adjusters: Check the boot
for cuts, tears, or other damage. Have it
replaced if necessary.
24.2
Gunite Slack Adjusters: Inspect the slack
adjuster for any signs of damage. If damaged, have the slack adjuster replaced.
4
6
7
3
10
25.2
1. 7/16-inch Adjusting
Nut
2. Grease Fitting
3. Boot
4. Link
5. Brake Chamber Piston
Rod
6.
7.
8.
9.
Clevis
1/2-inch Clevis Pin
1/4-inch Clevis Pin
Grease Relief
Opening
10. Slack Adjuster Spline
Fig. 11.13, Gunite Automatic Slack Adjuster
With the air system fully charged to 120
psi (827 kPa), make one full brake application and note the air pressure reading
on the gauge. Continue to reduce the air
pressure by moderate brake applications
to a maximum of 90 psi (620 kPa), then
run the engine at governed rpm. If the
time required to raise the air pressure to
120 psi (827 kPa) (from the pressure
noted after one brake application) is more
than 30 seconds, eliminate any leaks or
replace the air compressor before operating the vehicle.
Check the air governor cut-in and cut-out
pressures as follows.
Check the air pressure buildup time as
follows.
f421398
06/17/2003
Haldex Slack Adjusters: Inspect each
slack adjuster and anchor strap for damage. See Fig. 11.14. Have any damaged
components replaced.
Run the engine at fast idle. The air governor should cut out the air compressor at
approximately 120 psi (827 kPa). With the
engine idling, apply the brake pedal several times. The air governor should cut in
the air compressor at approximately 100
psi (689 kPa). If the air governor does not
cut in and out as described above, it must
be adjusted to these specifications. If the
air governor cannot be adjusted or repaired, replace it before operating the vehicle.
9
1
25. Check the air brake system for proper operation.
25.1
8
2
Inspect the slack adjuster boot for cuts or
tears. If the boot is damaged, have it replaced. See Fig. 11.13.
24.3
5
25.3
Check the air pressure reserve as follows.
With the air system fully charged to 120
psi (827 kPa), stop the engine and note
the air pressure. Then make one full brake
application and observe the pressure
drop. If it drops more than 25 psi (172
kPa), all areas of leakage must be eliminated before operating the vehicle.
25.4
Check the air leakage in the system as
follows.
11.14
Pretrip and Post-Trip Inspections and Maintenance
Maximum Allowable Service Brake Air Leakage
Air Leakage in psi
(kPa) Per Minute
Description
Released Applied
Truck or Tractor Only
2 (14)
3 (21)
Truck or Tractor w/Single Trailer
3 (21)
4 (28)
Truck or Tractor w/Two Trailers
5 (35)
6 (42)
1
2
3
Table 11.4, Maximum Allowable Service Brake Air
Leakage
9
8
4
26. Check the operation of the Bendix Hydro-Max®
7
brake booster, if equipped, as follows.
6
26.1
With the engine off, depress the brake
pedal; the warning light and buzzer should
come on, and the electric motor should
run.
26.2
Start the engine and allow the gauges to
sweep. Depress the brake pedal; no warning lights, buzzer, or electric motor should
come on.
5
10/11/2005
A
f421397
A. Rotate the control arm toward the brake chamber
until you can feel it contacting the internal stop.
1. Clevis
6. Control-Arm Washers
2. Slack Adjuster
and Nut
3. Clevis Pin
7. Anchor Strap Slot
4. Manual Adjusting Nut
8. Anchor Strap
5. Control Arm
9. Brake Chamber
27. Test the service brakes.
When starting to move the vehicle and before
picking up speed, test the brakes with the foot
pedal and parking brake control valve (yellow
knob) to be sure they will bring the vehicle to a
safe stop.
Fig. 11.14, Haldex Automatic Slack Adjuster
With the parking brake (spring brake) applied, the transmission out of gear, and
the tires chocked, charge the air system
until cut-out pressure of 120 psi (827 kPa)
is reached.
With the service brakes released, shut
down the engine, wait 1 minute and note
the air pressure gauge reading. Observe
the air pressure drop in psi (kPa) per
minute.
Charge the air system until cut-out pressure of 120 psi (827 kPa) is reached. With
the parking brakes released and the service brake applied, shut down the engine,
wait 1 minute and note the air pressure
gauge reading. Observe the air pressure
drop in psi (kPa) per minute.
If leakage exceeds the limits shown in
Table 11.4, repair all areas of leakage before driving the vehicle.
11.15
Weekly Post-Trip Inspection and
Maintenance
WARNING
Battery posts, terminals, and related accessories
contain lead and lead compounds, chemicals
known to the State of California to cause cancer
and reproductive harm. To prevent possible personal injury, always wash your hands after handling battery parts and related accessories.
1.
Inspect the batteries and battery cables.
1.1
Access the batteries. Be sure the battery
hold-down is secure. If it is loose, tighten
the hold-down bolts; if it is broken, replace
it.
Pretrip and Post-Trip Inspections and Maintenance
1.2
2.
3.1
Check the mounting bolts and pitman arm
nut for tightness.
3.2
Check the drag link nuts for missing cotter
pins.
If the sight glass is dark, the charge is low
and the battery must be recharged.
3.3
If the sight glass is clear, the battery has a
low level of electrolyte and must be replaced.
Inspect the steering drive shaft and steering linkage for excessive looseness, or
other damage.
3.4
Tighten loose nuts and have damaged
parts replaced as needed.
If the battery is equipped with a built-in
hydrometer, examine the hydrometer. If a
green dot shows in the sight glass, the
battery is sufficiently charged.
Check the level of the wheel bearing lubricant in
the hub cap at each end of the front axle.
4.
Look for signs of glazing, wear (frayed edges),
damage (breaks or cracks), or oil contamination.
If a belt is glazed, worn, damaged, or oil soaked,
have the belt replaced, following the instructions
in Group 01 of the Business Class® M2 Workshop Manual.
If needed, fill the hubs to the level indicated on
the hub cap. See Group 35 of the Business
Class® M2 Maintenance Manual, for recommended lubricants.
IMPORTANT: Before removing the fill plug, always clean the hub cap and plug.
3.
Check the condition of the serpentine drive belt.
NOTICE
Examine the steering components.
See Fig. 11.15. If repairs are needed, see
Group 46 of the Business Class® M2 Workshop
Manual for instructions, or take the vehicle to an
authorized Freightliner dealer.
Do not drive with a serpentine belt that is visibly
worn or damaged. If it fails, the lack of coolant
flow could rapidly cause damage to engine components.
5.
Use your index finger to apply force at the center
of the belt free-span. See Fig. 11.16. There is no
adjustment for belt tension on engines with automatic belt tensioners. If there is not proper tension, have the belt tensioner replaced. See
Group 01 of the Business Class® M2 Workshop
Manual for instructions, or take the vehicle to an
authorized Freightliner dealer.
1
1
6.
2
Check the drive belt for proper tension.
Inspect the seat belts and tether belts.
1
3
3
A
10/11/2001
B
f461916
1. Steering Gear Mounting Bolt
2. Pitman Arm Pinch Bolt Nut
3. Drag Link Nut
Fig. 11.15, Steering Gear Fasteners
10/31/94
f200036a
A. Deflection
B. Belt Free-Span
Fig. 11.16, Checking Belt Tension
11.16
Pretrip and Post-Trip Inspections and Maintenance
1.1
WARNING
Inspect and maintain seat belts as instructed
below. Worn or damaged seat belts could fail
during a sudden stop or crash, possibly resulting
in serious injury or death.
IMPORTANT: Seat belts have a finite life
which may be much shorter than the life of
the vehicle. Regular inspections and replacement as needed are the only assurance of adequate seat belt security over the
life of the vehicle.
NOTICE
Take care to keep the vent plugs tight so that the
neutralizing solution does not enter any of the
battery cells and damage the battery.
1.2
Use a soda solution to neutralize the acid
present, then rinse off the soda solution
with clean water.
1.3
If the battery posts or cable terminals are
corroded, disconnect the terminals from
the posts. Clean them with a soda solution
and a wire brush. After cleaning, connect
the terminals to the battery posts, then
apply a thin coat of petroleum jelly to the
posts and terminals to help retard corrosion.
NOTE: When any part of a seat belt needs
replacement, the entire seat belt must be
replaced, both retractor and buckle side.
6.1
Check the web for fraying, cuts, or extreme wear, especially near the buckle
latch plate and in the D-loop guide area.
6.2
Check the web for extreme dirt or dust
and for severe fading from exposure to
sunlight.
6.3
Check the buckle and latch for operation
and for wear or damage.
6.4
Check the Komfort Latch or Sliding Komfort Latch (if equipped) for function and
cracks or other damage.
6.5
Check the web retractor for function and
damage.
6.6
Check the mounting bolts for tightness
and tighten any that are loose.
2.
Monthly Post-Trip Inspection and
Maintenance
WARNING
Battery posts, terminals, and related accessories
contain lead and lead compounds, chemicals
known to the State of California to cause cancer
and reproductive harm. To prevent possible personal injury, always wash your hands after handling battery parts and related accessories.
1.
Clean the batteries.
11.17
Remove any corrosion from the hold-down
and the top of the battery.
Inspect the radiator and heater hoses, including
the clamps and support brackets.
2.1
Make sure the radiator inlet and outlet
hoses are pliable and are not cracking or
ballooning. Replace hoses that show signs
of cracking, weakening, or ballooning.
2.2
Make sure the heater hoses are pliable
and are not cracking or ballooning. Replace hoses that show signs of cracking,
weakening, or ballooning.
2.3
Tighten hose clamps as necessary, but do
not overtighten, as hose life can be adversely affected.
2.4
Be sure the hose support brackets are
securely fastened. Make sure the hoses
are not located near sources of wear,
abrasion, or high heat.
IMPORTANT: Replace all hoses, including
heater hoses, at the same time. Service-type
knitted or braided yarn-reinforced neoprene
hose is acceptable. Silicone hoses having an
extended service life can be substituted for the
reinforced neoprene type. See the Freightliner
Service Parts Catalog or contact your Freightliner Dealer.
3.
Check the steering wheel for excessive play.
Pretrip and Post-Trip Inspections and Maintenance
3.1
3.2
3.3
Start the engine. With the front tires
straight ahead, turn the steering wheel
until motion is observed at the front
wheels.
Drain the CNG high-pressure fuel filter housing,
if equipped.
6.
6.1
Align a reference mark on a ruler, then
slowly turn the steering wheel in the opposite direction until motion is again detected
at the wheels.
Gauges on the fuel panel should now read
at or near 0 psi (0 kPa).
Check the lash (free play) at the rim of the
steering wheel. See local/federal regulations for acceptable ranges of lash.
If there is excessive lash, check the steering system for wear or incorrect adjustment of the linkage and steering gear before operating the vehicle.
4.
5.
Purge the CNG fuel lines by closing the
CNG fuel cylinder shutoff valves. Start the
engine and let it idle until the fuel lines are
empty and the engine stops.
6.2
Close the manual fuel shutoff valve on the
fuel panel.
6.3
Remove the two capscrews that secure
the access cover to the fuel panel, then
remove the access cover. See Fig. 11.17.
Save the capscrews for installation.
Check the brake lining wear on all vehicles, including those with automatic slack adjusters.
Proper brake operation is dependent on periodic
maintenance and inspection of the brake linings.
4.1
Check that brake linings are free of oil and
grease.
4.2
Inspect the thickness of the brake linings.
If the axle assembly is equipped with a
dust shield or backing plate, remove the
inspection plugs. If any brake linings are
worn to less than approximately 1/4 inch
(6.4 mm) at the thinnest point, have the
linings replaced on all brake assemblies
on that axle. See Group 42 of the
Business Class® M2 Workshop Manual for
lining replacement instructions and camshaft end-play inspection.
4.3
Check the brake drums for wear and
cracks.
4.4
Check that the inspection plugs in the dust
shields or backing plates, if so equipped,
are installed.
Leak test the natural gas fuel system, if
equipped.
Use a methane detector to test all fuel system
components, joints, and fittings for leaks. A
bubble solution can be used to pinpoint the exact
location of leaks.
Replace any leaking or damaged fuel tanks and
fuel lines; repair or replace leaking or damaged
fittings.
8
7
2
6
5
4
3
2
1
05/04/2010
1. Fuel Panel Access
Cover
2. Capscrews (qty 2)
3. Wiring Harness
4. Pressure Relief Valve
and Cap
f470557
5. Coolant Outlet Line
6. Coolant Inlet Line
7. Fuel Inlet Line (to fuel
cylinders)
8. Fuel Outlet Line (to
engine)
Fig. 11.17, CNG Fuel Panel Assembly
11.18
Pretrip and Post-Trip Inspections and Maintenance
6.4
Slowly open the bleed valve on the manifold to relieve remaining fuel pressure
within the system. See Fig. 11.18.
6.8
6
5
Repair or replace any leaking components.
7
6.9
4
8
3
2
14
1
13
05/04/2010
1.
2.
3.
4.
5.
6.
7.
8.
9
10
12 11
f470558
Coolant Inlet Port
Coolant Outlet Port
Pressure Relief Valve
Pressure Regulator
Wiring Harness
Manifold Bleed Valve
Manifold
Manual Fuel Shutoff
Valve
9.
10.
11.
12.
13.
14.
Fuel Fill Port
Filter Housing
Filter Bowl
Filter Drain Plug
Solenoid Valve
Fuel Line To Cylinders
Fig. 11.18, CNG Fuel Panel Components
IMPORTANT: Some pressure may remain in
the fuel system between the solenoid valve
and the engine. Use caution when loosening
fittings, as a small amount of gas may leak
out.
6.5
Put a clean receptacle under the filter assembly.
6.6
Using an 11/16-inch wrench, remove the
drain plug from the filter bowl.
When all liquid has drained, install and
tighten the drain plug on the filter bowl.
6.7
Close the bleed valve on the manifold and
open the manual fuel shutoff valve on the
fuel panel.
Open the fuel cylinder shutoff valves.
11.19
Use a methane detector to leak test all
fuel system components between the fuel
cylinders and the solenoid valve. A bubble
solution can be used to pinpoint the exact
location of leaks.
Using the two capscrews removed in substep 6.3, install the access cover on the
fuel panel.
12
Cab Appearance
Cab Washing and Polishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Care of Fiberglass Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Care of Chrome Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Care of Exterior Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dashboard Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vinyl Upholstery Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Velour Upholstery Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.1
12.1
12.1
12.1
12.1
12.2
12.2
Cab Appearance
Cab Washing and Polishing
CAUTION
When pressure washing the vehicle or leaving
the hood open when parked outdoors and subject to rain, cover the air cleaner inlet with a plastic bag to prevent water from entering the air intake system and possibly damaging the engine.
To protect the finish of your new vehicle, follow these
guidelines carefully:
• During the first 30 days, rinse your vehicle fre-
quently with water. If the vehicle is dirty, use a
mild liquid soap. Do not use detergent.
• During the first 30 days, do not use anything
abrasive on your vehicle. Brushes, chemicals,
and cleaners may scratch the finish.
• During the first 120 days, do not wax your
vehicle.
To extend the life of your vehicle’s finish, follow these
guidelines:
• Avoid washing your vehicle in the hot sun. Al-
ways use water. After the cab is completely
washed, dry it with a towel or chamois.
• Do not dust painted surfaces with a dry cloth,
as this will scratch the paint.
• Do not remove ice or snow from a painted sur-
face with a scraper of any sort.
• To prevent damage to the finish, wax it regu-
larly. If the finish has become dull, before waxing, remove oxidized paint using a cleaner specifically designed for this purpose. Remove all
road tar and tree sap before waxing. Freightliner recommends that a quality brand of
cleaner or cleaner-polish and polishing wax be
used.
• Do not let diesel fuel or antifreeze stand on a
painted surface. If either should occur, rinse
the surface off with water.
• To prevent corrosion, have any nicks or other
damage on the finish touched up as soon as
possible.
• Park your vehicle in a sheltered area whenever
possible.
12.1
Care of Fiberglass Parts
Wash unpainted fiberglass air fairings and shields
monthly with a mild detergent, such as dishwashing
liquid. Avoid strong alkaline cleansers.
Apply a wax specifically designed for fiberglass.
Care of Chrome Parts
To prevent rust, keep chrome parts clean and protected at all times. This is especially important during
winter driving and in coastal areas where there is
exposure to salt air.
When cleaning chrome parts, use clean water and a
soft cloth or sponge. A mild detergent may also be
used.
Sponge gently, then rinse. If necessary, use a nonabrasive chrome cleaner to remove stubborn rust or
other material. Do not use steel wool.
To help protect the chrome after cleaning, apply a
coat of polishing wax to the surface. Never use wax
on parts that are exposed to high heat, such as exhaust pipes.
Care of Exterior Lights
Clean the headlight lenses by hand only, using a
flannel cloth with mild, non-caustic soap or detergent,
and water.
CAUTION
Do not use a power buffer, paper towels, chemical solvents, or abrasive cleaners on the headlight lens, all of which can remove the UV coating
from the surface, and result in yellowing of the
lens.
Dashboard Care
Periodically wipe the dashboard with a waterdampened cloth. A mild detergent can be used, but
avoid using strong detergents.
CAUTION
Do not use Armor-All Protectant®, STP Son-of-aGun®, or other equivalent treatments. These
cleaners contain vinyl plasticizers that can cause
Cab Appearance
stress crazing in the interior plastic panels,
which can result in cracking of the panels.
pentine may be used. Use care to prevent contact
with parts of the upholstery that are not vinyl.
Vinyl Upholstery Cleaning
Sulfide Stains
To prevent soiling, frequent vacuuming or light brushing to remove dust and dirt is recommended. Harsh
cleaning agents can cause permanent damage to
vinyl upholstery. To preserve the upholstery and prevent damage, carefully review the following sections
for recommended cleaning procedures. Waxing or
refinishing improves soil resistance and cleanability
for all vinyls. Any hard wax, such as that used on
automobiles, may be used.
Sulfide compounds, such as those found in eggs and
some canned goods, can stain after prolonged contact with vinyl. These stains can be removed by placing a clean, unprinted piece of cloth over the spotted
area and pouring a liberal amount of 6 percent hydrogen peroxide onto the cloth. Allow the saturated
cloth to remain on the spot for 30 to 60 minutes. For
stubborn spots, allow the hydrogen-peroxide saturated cloth to remain on the area overnight. Use caution to prevent the solution from seeping into the
seams or it will weaken the cotton thread.
Ordinary Dirt
Wash the upholstery with warm water and mild soap,
such as saddle or oil soap. Apply soapy water to a
large area and allow to soak for a few minutes, then
rub briskly with a cloth to remove the dirt. This can
be repeated several times as necessary.
If dirt is deeply imbedded, use a soft bristle brush
after applying the soap.
If dirt is extremely difficult to remove, wall-washing
preparations normally found around the home can be
used. Powdered cleaners, such as those used for
sinks and tiles, are abrasive and must be used with
caution as they can scratch the vinyl or give it a permanent dull appearance.
Chewing Gum
Harden the gum with an ice cube wrapped in a plastic bag, then scrape it off with a dull knife. Any remaining traces of gum can be removed with an allpurpose light oil (peanut butter will also work) and
wiped off.
Tars, Asphalts, and Creosote
Tars, asphalts, and creosote stain vinyl after prolonged contact. They should be wiped off immediately and the area carefully cleaned, using a cloth
dampened with naphtha.
Paint, Shoe Heel Marks
Paint should be removed immediately. Do not use
paint remover or liquid-type brush cleaner on vinyl.
An unprinted cloth, dampened with naphtha or tur-
Nail Polish and Nail Polish Remover
Prolonged contact with these substances causes permanent damage to vinyl. Careful blotting immediately
after contact minimizes damage. Do not spread the
liquid during removal.
Shoe Polish
Most shoe polishes contain dyes which penetrate
vinyl and stain it permanently. Shoe polish should be
wiped off as quickly as possible using naphtha or
lighter fluid. If staining occurs, try the procedure used
for sulfide stains.
Ball Point Ink
Ball point ink can sometimes be removed if rubbed
immediately with a damp cloth, using water or rubbing alcohol. If this does not work, try the procedure
used for sulfide stains.
Miscellaneous
If stains do not respond to any of the treatments described above, it is sometimes helpful to expose the
vinyl to direct sunlight for up to 30 hours. Mustard,
ball point ink, certain shoe polishes, and dyes often
bleach out in direct sunlight leaving the vinyl undamaged.
Velour Upholstery Cleaning
To prevent soiling, frequent vacuuming or light brushing to remove dust and dirt is recommended. Spot
clean with a mild solvent or an upholstery shampoo,
12.2
Cab Appearance
or the foam from a mild detergent. When using a solvent or a dry-cleaning product, follow the instructions
carefully and clean only in a well-ventilated area.
Avoid any product that contains carbon tetrachloride
or other toxic materials. With either method, pretest a
small area before proceeding. Use a professional
upholstery cleaning service when extensive cleaning
is needed.
Grease and Oil-Based Stains
Dampen a small absorbent cloth with dry-cleaning
solvent or spot remover. Apply the cloth carefully to
the spot from the outer edge to the center. Pat and
blot the spot with a clean, dry cloth. Repeat several
times, as necessary, turning the cloths so that the
stain does not redeposit on the fabric.
Sugar and Water-Based Stains
Apply water-based detergent or cleaner, working in
circular motions. Pat and blot as dry as possible. Repeat if necessary before drying thoroughly.
Chewing Gum or Wax
Harden the gum or wax with an ice cube wrapped in
a plastic bag, then scrape it off with a dull knife. Excess wax can be absorbed by placing a thick white
blotter over the wax and heating with a warm (not
hot) iron. Remove the remainder by using the procedure for grease and oil-based stains.
Mildew
Brush the dry fabric with a soft brush. Sponge with
detergent, and blot. If the fabric is colorfast, dilute a
teaspoon of bleach in one quart (one liter) of cool
water. Apply with a swab, directly on the mildew
stain. Dab repeatedly with clear, cool water, and blot
dry.
12.3
13
In an Emergency
Hazard Warning Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fire Extinguisher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emergency Kit, Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emergency Filter Replacement, Davco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emergency Starting With Jumper Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fire in the Cab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.1
13.1
13.1
13.1
13.2
13.5
13.6
In an Emergency
Hazard Warning Lights
WARNING
The hazard warning light flasher (Fig. 13.1) is part of
the multifunction turn signal switch. It is a red rocker
switch located on the top of the multifunction switch
module.
Use extreme care when placing flares in emergency situations that involve exposure to flammable substances such as fuel. An explosion or
fire could occur causing serious personal injury.
Emergency Filter
Replacement, Davco
4
5
1
2
If the filter cover on the Davco fuel/water separator is
broken, it will not be possible to operate the vehicle.
A standard spin-on filter will correct this problem.
Refer to the Davco web site for additional information, www.davcotec.com.
3
11/16/2001
To replace the filter on all Davco fuel/water separators, follow these procedures:
f820386
Press down on the upper part of the rocker to activate
the flashers.
1. Washer Button
2. Wiper Control Dial
3. Turn Signal Lever
4. Hazard Flasher (red)
5. Multifunction Switch Module
Fig. 13.1, Hazard Warning Flashers
To flash the hazard warning lights, press down on
the upper part of the rocker (towards the dash). To
stop the hazard warning lights, press down on the
lower part of the rocker (towards the steering wheel).
1.
Drain the fuel until it is below the level of the filter collar. See Fig. 13.2 for the model 232/233
fuel/water separator and Fig. 13.3 for the model
382 fuel/water separator.
2.
Remove the filter vent and vent seal.
NOTE: The filter vent and vent seal are not
needed in the emergency replacement. They
should be retained for later installation at the
time when the filter cover is replaced.
3.
Remove the filter collar using channel-lock pliers.
4.
Remove the filter cover, filter cover seal and
spring. Retain them for later assembly.
Fire Extinguisher
5.
A fire extinguisher is located in the cab by the driver’s door.
Remove the filter element and dispose of it properly.
6.
Install the standard engine spin-on filter (included
in the emergency kit) on the threaded stud.
Emergency Kit, Optional
An optional emergency kit is located in the cab. The
kit includes one or more of the following: a first aid
kit, a reflective vest, a triangular reflector, a flare kit,
and (on vehicles with a Davco fuel/water separator) a
spin-on fuel filter element.
If there is an emergency while driving, cautiously pull
off the road. Turn on the hazard warning lights. Place
the flares and reflector along the side of the road to
alert other drivers that an emergency situation exists.
13.1
NOTE: Remove the rubber grommet from the
stud.
7.
Install the filter cover, filter cover seal, and
spring, as removed.
8.
Install the filter collar over the filter cover. Tighten
the filter collar finger-tight.
9.
Start the engine and run it at increased rpm for
one minute to purge air from the fuel lines.
In an Emergency
1
2
3
8
4
9
5
6
10
7
11/14/2001
1.
2.
3.
4.
Filter
Filter
Filter
Filter
f470416
Vent
Vent Seal
Collar
Cover
5. Filter Cover Seal
6. Spring
7. Filter Element
8. Threaded Stud
9. Fuel Port
10. Drain
Fig. 13.2, Davco Model 232 and 233 Fuel/Water Separator
Emergency Starting With
Jumper Cables
When using jumper cables, follow the instructions
below.
WARNING
in the vicinity of the battery. Do not allow the vehicles to touch each other. Do not lean over the
batteries when making connections, and keep all
other persons away from the batteries. Failure to
follow these precautions could lead to severe
personal injury as a result of an explosion or
acid burns.
Batteries release explosive gas. Do not smoke
when working around batteries. Put out all flames
and remove all sources of sparks or intense heat
13.2
In an Emergency
1
2
3
8
9
4
5
6
10
11
7
11/14/2001
1.
2.
3.
4.
Filter
Filter
Filter
Filter
f470417
Collar
Vent
Vent Seal
Cover
5.
6.
7.
8.
Filter Cover Seal
Spring
Filter Element
Threaded Stud
9. Fuel Port
10. Drain
11. Bottom Plate Collar
Fig. 13.3, Davco Model 382 Fuel/Water Separator
CAUTION
Make sure both starting systems have the same
voltage outputs, and avoid making sparks. Otherwise the vehicle charging systems could be severely damaged. Also, do not attempt to charge
isolated, deep-cycle batteries with jumper cables.
Follow the battery manufacturer’s instructions
when charging deep-cycle batteries.
NOTE: On vehicles equipped with an optional
jump-start post, attach the positive cable clamp
to that post instead of to the battery.
13.3
1.
Apply the parking brakes and turn off the lights
and all other electrical devices.
2.
To gain access to the batteries, open the battery
compartment. See Fig. 13.4. For detailed instructions, see Chapter 2.
CAUTION
Always connect the battery, jumper cables, and
charger correctly (positive-to-positive and
negative-to-negative). Connecting a charging device backwards (positive-to-negative) will blow
fuses that power the bulkhead module (BHM) and
In an Emergency
chassis module (CHM), and the devices they control will not work.
3.
Connect an end of one jumper cable to the positive terminal of the booster battery (or jump-start
post if equipped), and connect the other end of
the cable to the positive terminal of the discharged battery (or jump-start post if equipped).
See Fig. 13.5.
WARNING
Do the next step exactly as instructed and do not
allow the clamps of one cable to touch the
clamps of the other cable. Otherwise, a spark
could occur near a battery, possibly resulting in
severe personal injury from explosion and acid
burns.
4.
3
2
Connect one end of the second jumper cable to
the negative terminal of the booster battery, and
connect the other end of the cable to a ground at
least 12 inches (300 mm) away from the batteries of the vehicle needing the start. The vehicle
frame is usually a good ground. Do not connect
the cable to or near the discharged batteries.
WARNING
4
1
f543933
10/24/2001
1. Top Step
2. Battery
3. Cab
4. Battery Access Door
On vehicles with Mercedes-Benz AGS transmissions, make sure the current gear indicator displays "N" before starting the vehicle. If the transmision starts in gear, it could cause an accident
resulting in death, serious personal injury, or
property damage.
5.
Start the engine of the vehicle with the booster
batteries, and let the engine run a few minutes to
charge the batteries of the other vehicle.
6.
Attempt to start the engine of the vehicle with the
batteries receiving the charge. Do not operate
the starter longer than 30 seconds, and wait at
least two minutes between starting attempts to
allow the starter to cool.
7.
When the engine starts, let it idle a few minutes.
Fig. 13.4, Battery Compartment, Open
C
A
B
+
D
−
+
E
−
E
+
G
−
+
−
1
A
2
10/18/94
A.
B.
C.
D.
1.
2.
WARNING
F
f540303a
To Ground
3rd
To Frame (ground)
4th
Booster Battery
Discharged Battery
E. To Starter
F. 2nd
G. 1st
Do the next step exactly as instructed and do not
allow the clamps of one cable to touch the
clamps of the other cable. Otherwise, a spark
could occur near a battery, possibly resulting in
severe personal injury from explosion and acid
burns.
8.
Disconnect the grounded cable from the frame or
other non-battery location, then disconnect the
other end of the cable.
9.
Disconnect the remaining cable from the newly
charged battery (or jump-start post if equipped)
first, then disconnect the other end.
Fig. 13.5, Jumper Connections
13.4
In an Emergency
10. Close the battery compartment. For detailed in-
to the vehicle frame. Use protection to keep the
chains from damaging the frame.
structions, see Chapter 2.
5.
Towing
When it is necessary to tow the vehicle, make sure
the instructions below are closely followed to prevent
damage to the vehicle.
WARNING
Do not tow an unbraked vehicle if the combined
weight of both vehicles is more than the sum of
the gross axle weight ratings (GAWR) of the towing vehicle. Otherwise brake capacity will be inadequate, which could result in personal injury or
death.
CAUTION
Do not pass a sling (for example, a rope or chain)
from one tow hook to another to fasten for towing (see Fig. 13.6). Known as reeving, this practice is not permissible in most industrial applications of towing and hoisting. Reeving can
overload the hooks and result in damage to the
vehicle.
6.
Attach the towing device. Due to the many variables that exist in towing, positioning the lifting
and towing device is the sole responsibility of the
towing-vehicle operator.
7.
Lift the vehicle and secure the safety chains. If
extra towing clearance is needed, remove the
front wheels.
8.
Connect the clearance lights, taillights, and signal lights. Connect any special towing lights required by local regulations.
Front Towing Hookup
1.
Disconnect the battery ground cables.
CAUTION
Failure to remove the axle shafts when towing
the vehicle with the rear wheels on the ground
could result in damage to the transmission and
other parts.
2.
Remove both drive axle shafts. On dual drive
axles, if the vehicle is to be lifted and towed, remove only the rearmost drive axle shafts.
On vehicles equipped with an air fairing, remove
both the forward and rearmost drive axle shafts if
there is insufficient towing clearance.
3.
Cover the ends of the hubs with metal plates or
plywood cut to fit the axle opening, and drilled to
fit the axle shaft studs. This prevents lubricant
from leaking out and will keep contaminants from
getting into and damaging the wheel bearings
and axle lubricant.
WARNING
Failure to chock the tires or connect the tow
truck’s air brake system before releasing the
spring parking brakes could allow the disabled
vehicle to suddenly roll. This could cause property damage or personal injury.
9.
4.
13.5
On dual drive axles, if the vehicle is to be lifted
and towed, chain the forward rear-axle assembly
Chock the tires on the disabled vehicle and connect the towing vehicle’s air brake system to the
vehicle being towed. Then, release the spring
parking brakes and remove the chocks.
Rear Towing Hookup
CAUTION
CAUTION
Failure to protect the frame rails from the chains
could cause damage, leading to eventual frame
failure.
Remove the bumper end caps and chrome
bumper (if equipped).
Using a rear towing hookup on a vehicle
equipped with a roof fairing could cause damage
to the cab structure.
1.
Place the front tires straight forward and secure
the steering wheel in this position.
2.
Disconnect the battery ground cables.
In an Emergency
OK
2
1
1
OK
f880694
01/11/2006
IMPORTANT: Do not reeve when towing.
1. Tow Hook
2. Chain
Fig. 13.6, Reeving
CAUTION
Failure to protect the frame rails from the chains
could cause damage, leading to eventual frame
failure.
3.
On dual drive axles, using protection to keep the
chains from damaging the vehicle frame, chain
the forward-rear drive axle to the frame.
4.
Attach the towing device. Due to the many variables that exist in towing, positioning the lifting
and towing device is the sole responsibility of the
towing-vehicle operator.
5.
Lift the vehicle and secure the safety chains. If
extra clearance is needed, remove the bumper
extension if equipped.
6.
Connect the clearance lights, taillights, and signal lights. Also connect any special towing lights
required by local regulations.
Safety Administration. Federal Motor Vehicle Safety
Standard #302 limits the flammability of specified
materials used inside the cab, but despite this, most
materials will burn. The cab of this vehicle contains
urethane foam, which is of concern in this respect.
WARNING
Urethane foam is flammable! Do not allow any
flames, sparks, or other heat sources such as
cigarettes or light bulbs to contact urethane
foam. Urethane foam in contact with such heat
sources could cause a serious, rapid fire, which
could result in death, severe burns, or gas poisoning, as well as damage to the vehicle.
In Case of a Cab Fire
As quickly as possible, bring the vehicle to a safe
stop, apply the parking brake, turn off the ignition,
and get out of the vehicle.
Fire in the Cab
The incidence of fire in medium-duty trucks is rare,
according to data from the National Highway Traffic
13.6
14
Headlight Aiming
Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.1
Checking Headlight Aim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.1
Adjusting Headlight Aim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.2
Headlight Aiming
Preliminary Checks
CAUTION
Before checking or adjusting the headlight aim, do
the following:
Do not use a power buffer, paper towels, chemical solvents, or abrasive cleaners on the headlight lens, all of which can remove the UV coating
from the surface, and result in yellowing of the
lens.
• Remove large amounts of mud or ice from the
underside of the fenders.
• Check the springs for sagging or broken
leaves.
Checking Headlight Aim
• Check the suspension for proper functioning of
the leveling mechanism. On cabs with air suspensions, make sure that the height is properly
adjusted.
1.
• Check for damage to the hood and hinge as-
sembly. Repair as necessary.
Park the vehicle on a level surface 25 ft (7.6 m)
from a screen or wall that can be used for aiming
the headlights. Shut down the engine, apply the
parking brake, and chock the front tires. See
Fig. 14.1.
NOTE: The low-beam headlight is the top bulb
in the dual-beam assembly.
• With the vehicle unloaded, check that the tires
are inflated to the recommended air pressure.
• Clean the headlight lenses. Clean by hand
2.
only, using a flannel cloth with mild, noncaustic soap or detergent, and water.
On each headlight, find the bulb center. See
Fig. 14.2.
3.
Measure the distance from the ground to the
center of each low-beam bulb. Note those distances.
1
2
6 ft (1.8 m)
3
4
6
t
25 f
5
(7.6
01/20/2003
f544233
1. Vertical Centerline of Right Headlight
2. Distance Between Headlights
3. Vertical Centerline of Left Headlight
4. Projected Vehicle Centerline
5. Screen or Wall
6. Height of Lamp Centers
Fig. 14.1, Headlight Aiming Screen or Wall
14.1
m)
Headlight Aiming
• If either or both headlights do not aim into
the inner edges of the centerline, follow the
adjusting procedure below.
• If both headlights come close to the inside
of each headlight centerline (as shown), no
further work is needed. Turn off the headlights and remove the chocks from the
front tires.
Adjusting Headlight Aim
11/06/2002
f544236
1.
Measure beam height from the ground to the small dot
roughly in the center of the headlight lens.
Lift the flap over the rear end of the headlight
bucket to expose the two plastic adjusting knobs
on each headlight. See Fig. 14.4.
Fig. 14.2, Headlight Beam Height Adjusting Dot
4.
On the screen or wall 25 ft (7.6 m) away, make
the appropriate markings directly across from
each headlight and at the same height as measured for the headlight.
5.
Turn on the headlights to the low-beam setting.
See Fig. 14.3 for the ideal and acceptable patterns for both headlights.
1
2
A
8"
f544235
11/05/2002
B
8"
NOTE: The right-hand side headlight bucket is shown.
The left-hand side is opposite.
1. Inboard Adjusting Knob
2. Outboard Adjusting Knob
1
Fig. 14.4, Headlight Adjusting Knobs
A
8"
NOTE: Horizontal aim should not be adjusted in
the field.
B
2.
8"
01/11/2011
1
f544153
NOTE: The top view shows the ideal beam pattern; the
bottom view shows an acceptable standard.
A. Vertical Centerline
1. Bright Area
B. Horizontal Centerline
Fig. 14.3, Headlight Beam Pattern
With the vehicle parked 25 ft (7.6 m) from the
screen or wall, put the headlights on low beams,
and turn both adjusting knobs the same amount,
as needed to adjust the lights until the beam pattern meets the acceptable standard. Turn the
knobs clockwise to raise the beam and counterclockwise to lower it.
NOTE: Blocking off each light is not necessary,
but it can help to present a clearer beam pattern.
3.
Remove the chocks from the front tires.
14.2
15
Hybrid Electric Vehicle
Hybrid Electric Vehicle (HEV) Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Precautions (HEV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting, and Engine Shutdown (HEV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hybrid System Fault Lamps (HEV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emergencies (HEV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jumpstarting (HEV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing (HEV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15.1
15.2
15.2
15.2
15.3
15.3
15.3
Hybrid Electric Vehicle
Hybrid Electric Vehicle (HEV)
Overview
A hybrid electric vehicle (HEV) has both a diesel engine and an electric motor. Engine torque is augmented with electrical torque. The electric motor is
powered by batteries, which are charged by regenerative braking and, on vehicles equipped with the
ePTO option, the diesel engine.
The batteries cannot move the vehicle for long distances at highway speeds. In the event of a diesel
engine failure, drive the vehicle to a safe location as
quickly as possible.
Eaton Corporation developed and supplies the hybrid
electric system for Freightliner Trucks. The primary
system components are the hybrid drive unit (or
"HDU", which includes the electric generator/motor
and automated transmission), power electronics carrier (PEC), and the motor inverter/controller. Electric
power take-off (ePTO) and auxiliary power generator
(APG) components are optional on the HEV system.
Freightliner Trucks designed the stand-alone liquid
cooling system required to support the operation of
Eaton’s HEV system. Its primary system components
are the electric water pump, reservoir/expansion
tank, radiator, electric radiator fan, and coolant
plumbing.
High-Voltage Safety Features
The HEV has high-voltage cables and a service
switch on the PEC.
High-voltage cables are covered in orange insulation
and conduit. Each high-voltage component is tagged
with a warning or danger label.
IMPORTANT: The service switch on the PEC
should only be used for an emergency shutdown, or when the service manual or troubleshooting guide calls for work on the high-voltage
system. The service manual and troubleshooting
guide for the hybrid electric system are available
from www.roadranger.com.
The red service switch is located next to the highvoltage cable connections at one end of the PEC.
Pushing in the red service switch will shut down the
engine. The hybrid system will be disabled, and the
high-voltage batteries in the PEC, though still live,
are isolated in the PEC.
NOTE: The PEC may be mounted in an area
with limited access.
For information on emergency shutdowns, see
"Emergencies" in this chapter.
Cooling System
Body builders will develop the components for the
PTO, the PTO plumbing, and a safety switch to prevent the diesel engine from starting when the hood is
open.
The HEV requires a liquid cooling system for the
HDU, inverter, DC/DC Converter (if ePTO equipped),
and APG (if equipped). The HEV’s cooling system is
separate from the engine cooling system.
Regenerative Braking
For coolant, use a mixture of 50 percent ethylene
glycol and 50 percent water.
Regenerative braking reduces vehicle speed by converting some of the vehicle’s kinetic energy into electric energy to charge the hybrid system’s batteries.
When the accelerator pedal is at idle while coasting,
or the service brake is depressed to slow the vehicle,
the hybrid system charges the batteries.
The regeneration will feel as if the brake is being
lightly applied when you remove your foot from the
accelerator pedal. The full power of the service brake
is always available to the driver, and regenerative
braking is automatically shut off during an ABS (antilock brake) event.
The Eaton Hybrid Control Unit will automatically shut
off regenerative braking when the batteries are fully
charged.
15.1
Electric Power Take-Off (ePTO)
The Electric Power Take-Off (ePTO) option provides
standard hydraulic functions without continuous diesel engine operation. The PTO drive power is provided by the hybrid motor and hybrid batteries. When
the hybrid batteries deplete, the diesel engine automatically starts to recharge them and provide PTO
drive power. Once the batteries are fully charged, the
engine shuts down automatically. Vehicles with the
ePTO option are designed with a safety switch to
ensure the diesel engine does not start when the
hood is open.
A DC/DC converter is required for ePTO applications
to convert high-voltage DC to 12-volt DC.
Hybrid Electric Vehicle
NOTE: To maintain a power supply from the vehicle’s low-voltage batteries, the alternator
charges them when the vehicle is being driven.
5.
Safety Precautions (HEV)
Apply the service brake, then release the parking
brake.
6.
With the service brake applied, press the desired
mode on the shift control to put the vehicle into
gear.
7.
Slowly release the service brake.
The HEV has high-voltage components, including
340-volt DC batteries and a 500-volt AC motor.
Never cut high-voltage cables or connectors. Do not
paint high-voltage cables.
Avoid direct pressure wash on high-voltage connections (PEC, DC/DC Converter) and the air intake and
exhaust on the PEC.
Starting, and Engine Shutdown
(HEV)
The Cranking System
The primary engine starter is the electric motor in the
HDU, which cranks the engine very quickly. The
back-up cranking system is the standard 12-volt
starter on the engine. If the hybrid system is offline
or the hybrid batteries are insufficiently charged, the
vehicle will automatically use the 12-volt cranking
system to start the engine.
Starting
1.
Set the parking brake.
2.
Place the key in the ignition, and turn it clockwise to the ON position to initiate power to the
hybrid system.
Wait for the gauges on the instrument panel to
complete two sweeps (one from left to right, and
one from right to left) and return to their normal
ranges.
3.
Ensure the transmission is in neutral. The gear
display should display a solid "N".
WARNING
Never start the engine unless the transmission is
in neutral and the brake is applied. Accidental
movement of the vehicle could result in property
damage, personal injury, or death.
4.
to return to the ON position. The engine will continue to run with the key in the ON position.
NOTE: The vehicle may be powered by the
electric motor or the diesel engine, depending
on battery charge and the demand for driveline
torque. If the electric motor alone is powering
the driveline, the diesel engine will stay at idle.
Engine Shutdown
1.
Place the transmission in neutral by selecting N
on the shift control.
IMPORTANT: The transmission must be in neutral for proper shutdown.
2.
Set the parking brake.
3.
Turn the key counterclockwise to the OFF position.
NOTE: Intermittent noises such as clicking and
transmission shifting may be audible from the
transmission while it completes a self-test and
shutdown.
Hybrid System Fault Lamps
(HEV)
There are two lamps on the dashboard that indicate
a hybrid system fault is active — the red STOP HYBRID lamp and the amber CHECK HYBRID lamp.
See Fig. 15.1. When the red STOP HYBRID lamp is
illuminated, do not drive the vehicle; have it towed to
a Freightliner dealer or an authorized service center
for repairs. When the amber CHECK HYBRID lamp
is illuminated, the vehicle can still be driven, though it
may operate without the assistance of the hybrid
electrical system.
Turn the key clockwise to the START position.
The engine will crank after a brief delay. As soon
as the engine starts, release the key, allowing it
15.2
Hybrid Electric Vehicle
• Do not cut into or open the DC/DC converter.
• Do not cut into or open the inverter.
If it is necessary to remove occupants using cutting
equipment, avoid high-voltage cables and the PEC.
CHECK
HYBRID
Jumpstarting (HEV)
STOP
HYBRID
07/09/2008
Jumpstarting vehicles equipped with the Eaton® Hybrid System is identical to Non-Hybrid vehicles,
which use the vehicle 12-volt battery system.
f611013
Fig. 15.1, Hybrid System Fault Lamps
Emergencies (HEV)
Emergency Shutdown
WARNING
After disabling the vehicle, power is maintained
in the high-voltage electrical system for up to five
minutes. Unprotected contact with any "live" high
voltage components can cause serious injury or
even death.
There are two options for performing an emergency
shutdown. The preferred method is to turn off the
ignition key. The other option is to disconnect the
low-voltage (12-volt) vehicle batteries. In either case,
the engine will shut down, dash lights will shut down,
the hybrid electrical system will shut down, and the
high-voltage batteries in the Power Electronics Carrier (PEC) will remain "live" but isolated in the PEC.
NOTE: If the service switch on the PEC is accessible, it may be pushed in to shut down the
hybrid electrical system and isolate the "live"
HEV batteries in the PEC.
In Case of an Accident or Fire
If the HEV becomes involved in an accident or fire,
be aware of the following:
• Use CO2 or dry chemical extinguishers. The
batteries in the PEC are lithium ion.
• Do not cut into high-voltage cables. The high-
voltage wiring is covered in orange insulation
or convoluted tubing.
• Do not cut into or open the PEC.
15.3
Towing (HEV)
When towing the vehicle, the output shaft of the
transmission must not be allowed to spin or turn. If
the vehicle is towed with the drive wheels still in contact with the road surface, the vehicle axle shafts or
driveline must be removed or disconnected. See
"Towing" in Chapter 13.
16
Natural Gas Vehicle
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.1
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.1
Fuel Tank Filling Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.2
Gas Detection System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5
Engine Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.9
Major Repair and Replacement of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.10
Natural Gas Vehicle
General Information
The Business Class® M2 can be equipped with a
compressed natural gas (CNG) fuel system, or a liquefied natural gas (LNG) fuel system. CNG is made
by compressing natural gas to less than 1% of its
volume at standard atmospheric pressure. LNG is
created by condensing natural gas into a liquid by
cooling it to approximately -259°F (-162°C).
When vaporized at ambient temperatures, natural
gas is less dense than air, and it rises and disperses.
However, LNG is intially heavier than air due to its
cryogenic temperature. When released in large
amounts, it may drop or pool on the ground before
it’s temperature rises and the LNG vaporizes. Cold
atmospheric conditions may prevent natural gas from
dispersing quickly when released in large amounts.
Safety Precautions
DANGER
Natural gas is highly flammable. Failure to observe the following safety precautions could lead
to the ignition of the natural gas, which could
cause serious bodily injury or death.
Follow these safety precautions when operating or
repairing a natural gas vehicle.
• Do not start the engine if a natural gas leak is
detected.
• Do not transfer CNG from one vehicle to an-
other, as a buildup of static electricity could
cause a spark and ignite the fuel.
Natural gas is nontoxic, but it can cause asphyxiation
if present in very large concentrations.
• Avoid open flames or sparks near a natural
CNG often contains an odor-producing chemical,
while LNG does not have any odor. Users of naturalgas-fueled vehicles should never expect to detect
natural gas leaks by scent.
• Cover eyes and exposed skin when working on
gas vehicle.
a natural gas fuel system or fueling a natural
gas vehicle.
• Permit no smoking or other ignition sources
within thirty feet of a natural gas vehicle.
For natural gas to burn, it must first vaporize, then
mix with air in the proper proportions (flammable
range is 5 to 15% by volume in air), and then be ignited.
• Have CO2 fire extinguishers (ABC minimum)
A typical natural gas fuel system consists of:
• Always purge the fuel lines before performing
• Fuel supply cylinders that store compressed
gas at high pressure (CNG), or a tank that
stores liquefied gas at an extremely low temperature (LNG).
• A vaporizor or heat exchanging device that
changes LNG to gaseous form (LNG fuel systems only).
• Pressure relief and manual fuel shutoff valves.
• A filling connection with a check valve that pre-
vents the gas from flowing back out of the fuel
filling line.
• High-pressure and low-pressure fuel filters.
• A pressure control regulator that reduces the
high fuel tank or cylinder pressure to the lower
pressure needed for the engine.
• A fuel contents gauge that indicates the fuel
supply in the tank or cylinders.
16.1
located in a highly visible and easily accessible
location.
maintenance or repairs on a natural gas fuel
system. To purge the lines, close the manual
fuel shutoff valve, and start the engine. Let the
vehicle idle until the fuel lines are empty and
the engine stops.
• Always use a natural gas detector to test the
system for leaks, whether an odor is present or
not. Routinely inspect the fuel filtering and
regulating mechanisms, and the fuel lines. A
bubble solution can be used to pinpoint the
exact location of leaks.
• Always tighten fasteners and fuel connections
to the required torque specification. Overtightening or undertightening could cause leaks.
• Close the fuel shutoff valve(s) before perform-
ing maintenance and repairs.
• Do not store a natural gas vehicle indoors for
any extended period of time. Do not bring a
natural gas vehicle inside indoors unless the
Natural Gas Vehicle
workshop is equipped with a methane detection and ventilation system.
Fuel Tank Filling Procedures
IMPORTANT: Close all windows and doors during the fueling process. Keeping windows and
doors closed allows for easier leak detection
inside the cab after fueling.
CNG Vehicle Fueling
CNG is moved from the fuel station storage tanks to
the vehicle cylinders through a metered dispenser.
During fueling, as pressure inside of the vehicle cylinders increases, so does the temperature. The dispenser shuts off when it determines the CNG cylinders are full.
CNG fuel cylinders cannot be filled to their full capacity of 3600 psi (24 800 kPa) in cooler weather. Since
temperature change causes gas to expand and contract, less pressure in the cylinders on a cold day is
equal to the same amount of gas at a higher pressure on a warm day. The fuel station dispenser has a
temperature-pressure compensating device, which
accounts for ambient temperature during fueling. See
Table 16.1 for approximate full cylinder pressures at
various temperatures.
CNG Temperature/Pressure Compensation Values
Fill Station Pressure Set Point
Temperature:
3000 psi (20 684
3600 psi (24 821
°F (°C)
kPa) Set Point
kPa) Set Point
100 (37.8)
3415 (23 546)
4086 (28 172)
90 (32.2)
3276 (22 587)
3909 (26 952)
80 (26.7)
3138 (21 636)
3754 (25 883)
70 (21.1)
3000 (20 684)
3600 (24 821)
60 (15.6)
2861 (19 726)
3445 (23 752)
50 (10)
2723 (18 774)
3288 (22 670)
40 (4.4)
2584 (17 816)
3131 (21 587)
30 (-1.1)
2446 (16 865)
2973 (20 498)
20 (-6.7)
2307 (15 906)
2814 (19 402)
10 (-12.2)
2169 (14 955)
2655 (18 306)
0 (-17.8)
2031 (14 003)
2495 (17 202)
-10 (-23.3)
1893 (13 052)
2336 (16 106)
-20 (-28.9)
1755 (12 100)
2180 (15 031)
-30 (34.4)
1616 (11 142)
2024 (13 955)
-40 (-40)
1477 (10 184)
1868 (12 879)
Table 16.1, CNG Temperature/Pressure Compensation
Values
Use the following steps to fuel a CNG vehicle.
1.
Shut down the engine and apply the parking
brake.
WARNING
Natural gas fuel tanks, lines, and valves are always pressurized. Always observe safety precautions. Failure to do so could lead to loss of control over a filling hose or to ignition of the natural
gas, which could cause serious bodily injury,
death, or severe property damage.
2.
Ensure all fuel cylinder shutoff valves are open.
See Fig. 16.1.
1
2
3
8
04/22/2010
1. Fuel Cylinder Storage
Box
2. Fuel Cylinder Shutoff
Valves (qty 5)
3. High-Pressure Gauge
4. Low-Pressure Gauge
7
4
6
5
f470554
5.
6.
7.
8.
Fuel Fill Port
Dust Cap
Manual Shutoff Valve
Fuel Panel Access
Door
Fig. 16.1, CNG Fuel Cylinder Storage Box (5-cylinder
system shown)
16.2
Natural Gas Vehicle
3.
Ensure the vehicle fuel system main shutoff
valve is open.
LNG Vehicle Fueling
4.
Open the CNG fuel panel access door and remove the dust cap from the vehicle fuel fill port.
5.
Ensure the O-ring is present inside the fuel fill
port. If the O-ring has been dislodged or is missing, the station dispensing nozzle will not connect securely to the fill port.
The LNG fuel tank is designed to be filled from any
LNG fuel source that has a 100 micron or finer fuel
filter and a fuel delivery pressure between 120 and
225 psi (827 and 1551 kPa).
6.
Turn the selector knob on the service pump to
the VENT position, if equipped.
7.
Connect the quick coupling on the dispensing
nozzle securely to the vehicle fuel fill port.
8.
Turn the selector knob on the service pump to
the FILL position, if equipped.
IMPORTANT: If at any time the service pump or
vehicle begins to vent CNG uncontrollably, notify
a station attendant or activate the service station emergency shut-off switch to cease the flow
of CNG.
9.
Switch on the service pump. A slight hissing
noise may be heard as the fuel cylinders fill.
10. Watch the pressure gauge on the service pump.
When the gauge reads approximately 3600 psi
(24 800 kPa), or when the fill pressure stops
climbing, the CNG cylinders are full. The service
pump will shut itself down automatically. See
Table 16.1 for pressure compensation values
based on ambient temperatures.
11. Move the selector knob on the service pump to
the VENT position, if equipped. A short hiss will
be heard as a small amount of natural gas is
vented into the hose.
WARNING
Do not attempt to remove the fill station nozzle
from the tank fill fitting until venting of pressure
is noted. If no venting occurs, ask for assistance
from the station attendant. Removing an unvented coupling could result in an uncontrolled
hose, which could lead to property damage or
personal injury.
12. Remove the station dispensing nozzle from the
vehicle fill port.
13. Install the dust cap on the vehicle fuel fill port
and close the fuel panel access door.
16.3
The LNG fuel tank is designed to be top-filled
through a single hose with no vent return. As cold
LNG is sprayed into the vapor space of the tank, the
cold liquid condenses the vapor and creates space
for itself inside the tank, eliminating any need to vent
during the filling process.
The LNG tank is equipped with a small internal ullage tank for vapor space, which allows for fuel expansion and increases vehicle standby time. When
an LNG tank is full, fuel can continue to flow into the
ullage tank. However, if the ullage tank is completely
filled during fueling, standby time will be reduced to
zero and the primary relief valve will open almost
immediately after fueling, allowing excess LNG vapor
to escape. If fueling is stopped when the ullage tank
is empty (i.e., the fuel tank has sufficient vapor space
to accommodate fuel expansion due to temperature
increase), the vehicle will have approximately one
week of standby time before venting will occur.
Use the following steps to fuel an LNG vehicle.
1.
Shut down the engine and apply the parking
brake.
IMPORTANT: Close all windows and doors during the fueling process. Keeping windows and
doors closed allows for easier leak detection
inside the cab after fueling.
WARNING
Liquefied natural gas is a cryogenic liquid stored
at approximately -259°F (-162°C). Cryogenic
burns can be caused by coming into contact with
the pressurized liquid stream, or by coming into
contact with fuel system components that have
been cooled to cryogenic temperatures. Always
wear gloves and a face shield, and cover exposed skin when fueling.
2.
Remove the fuel fill fitting dust cap. See
Fig. 16.2.
Natural Gas Vehicle
2
causing tank pressure to spike above 250 psi
(1724 kPa) and automatically shutting down the
station fuel pump. To prevent the pump from
shutting down, connect a vent line to the fill vent
fitting on the LNG tank to capture escaping
vapor, then open the shroud cover and open the
vapor shutoff valve (Fig. 16.3, Item 2).
3
4
6
6.
Open the station’s fill valve, if equipped, and
start fueling. Monitor the flow or line pressure as
filling progresses. When filling begins, line pressure will spike quickly until the vehicle tank cools
down. The flow and pressure will then remain
stable during the remainder of the filling
procedure.
5
1
7
05/29/2009
6
4. Fill Vent Fitting
5. Shroud Cover
6. Shroud Cover Latches
9
6
f470534
1. Fuel Fill Fitting
2. Fuel Outlet Line
3. Primary Relief Vent
Line
8
10
5
11
12
Fig. 16.2, LNG Fuel Tank
3.
Using compressed air, remove any dirt, debris, or
water that may have collected in the fuel fill fitting and the station dispensing nozzle. Contaminants in the fuel system can cause drivability
problems.
4
3
2
WARNING
Natural gas fuel tanks, lines, and valves are always pressurized. Always observe safety precautions. Failure to do so could lead to loss of control over a filling hose or to ignition of the natural
gas, which could cause serious bodily injury,
death, or severe property damage.
4.
Connect the station fueling nozzle to the tank
fuel fill fitting.
5.
Connect an electrical ground clamp and cable to
the fuel tank.
IMPORTANT: An LNG tank which is first installed, or is on a vehicle that has not been operated in approximately ten days, is considered
to be a hot tank. When fueling a hot tank, LNG
entering the tank will immediately vaporize,
1
05/05/2010
1. Pressure Control
Regulator
2. Vapor Shutoff Valve
3. Fuel Fill Hose
4. Secondary Relief
Valve (red cap)
5. Fuel Fill Fitting
6. Fuel Level Sender
Box
f470533
7.
8.
9.
10.
11.
Primary Relief Valve
Tank Pressure Gauge
Fill Vent Fitting
Excess Flow Valve
Fuel Shutoff Valve
(liquid)
12. Fill Check Valve
Fig. 16.3, LNG Fuel Tank Plumbing Components
IMPORTANT: When fueling a hot tank, initially
put 5 to 10 gallons (19 to 37 liters) of LNG in
the tank and manually stop the fueling process.
Drive the vehicle for 15 to 20 minutes to cool
16.4
Natural Gas Vehicle
the tank and reduce tank pressure, then continue fueling the tank to full.
7.
When the tank is full, the line pressure will rapidly spike and the flow rate will fall. When a pressure rise or flow rate drop is observed, close the
station’s fill valve, if equipped.
NOTE: Do not over-fill an LNG tank. If the ullage tank is completely filled during fueling, tank
standby time will be reduced to zero and the
primary relief valve will open almost immediately
after fueling.
8.
Disconnect the station hose from the tank fuel fill
fitting.
9.
Disconnect the electrical ground clamp and cable
from the fuel tank.
sor detects gas fumes in concentrations above 50%
LFL, and should allow ample time to utilize safety
procedures. However, individuals with special needs
should review the system with a professional safety
engineer.
Alarm Procedure
Before operating the vehicle, the driver must be familiar with the procedures as shown on the interior
sticker on the overhead panel (Fig. 16.4) and the
exterior sticker on the door (Fig. 16.5).
10. Install the dust cap on the tank fuel fill fitting.
Gas Detection System
A gas detection system is used in all Daimler Trucks
natural-gas-fueled vehicles. This system has a sensor in the engine compartment and one in the cab,
both situated in high areas to detect natural gas
buildup as a result of leaks.
The AMGaDS III Plus is a natural gas detection system. This device is meant to serve as a supplemental warning only. It is not intended to replace standard safety practices that should be conducted
around flammable gases.
IMPORTANT: To function properly, the gas detection system must be powered at all times.
The gas detection system is directly powered by
the batteries, and can only be powered off by
disconnecting the batteries.When servicing a
natural-gas-fueled vehicle, disconnect the batteries only when necessary, and do not leave
the batteries disconnected for extended periods
of time.
The lower flammability limit (LFL) is the smallest
amount of the gas that supports a flame when mixed
with oxygen and ignited. Zero percent (0%) LFL indicates a gas-free atmosphere. One hundred percent
(100%) LFL indicates that gas concentration has
reached its lower flammability limit (5% gas in air by
volume). The red warning light and audible alarm
located in the overhead console activate when a sen-
16.5
04/28/2009
f080157
Fig. 16.4, Interior Warning Sticker
IMPORTANT: If an audible alarm activates, do
not operate any electrical switch, including
lights. Avoid causing sparks and stay away from
arcing switches and equipment. Do not use a
telephone, including cellular phones or any
types of portable communication or electronic
devices that have a battery.
If the vehicle is in motion when the audible alarm
activates, bring it to a safe stop, shut down the engine, and exit the vehicle. Do not open the hood.
If outside the vehicle when the audible alarm activates, do not open the cab door or hood.
In the event of an audible alarm, immediately follow
these procedures, as allowed by conditions:
1.
Immediately shut off all engines. Extinguish any
cigarettes, pilot lights, flames, or other sources of
ignition in the area and adjacent areas.
Natural Gas Vehicle
frontwall. The sensors are located in high areas,
where rising gas vapors will pass by or accumulate.
If the system detects that one of the sensors has
been disconnected or has malfunctioned, the sensor
fault light for that zone will illuminate. A failed sensor
may trigger and lock on an alarm. If a fault condition
or locked alarm continues after the sensor’s connection and wiring integrity has been verified, replace
the sensor.
The sensors are sensitive to all hydrocarbon vapors.
An alarm may be triggered by the use of chemicals
such as cleaners, paint, polish, lacquer, gasoline,
silicone, silicone spray, or other harsh chemicals.
The sensors will also detect hydrogen fumes from an
overcharged battery. If a sensor sends an alarm, but
no gas fumes are present, check for recent use of
chemicals or a battery charger.
NOTICE
04/28/2009
f080158
Fig. 16.5, Exterior Warning Sticker
2.
Manually close all fuel shutoff valves, including
those on the LNG tank or CNG cylinders.
3.
If the vehicle is indoors (as in a service shop),
immediately open windows and doors to provide
extra ventilation to the area. Do not start the engine or any other type of equipment until the gas
leak is corrected and the area cleared of natural
gas.
4.
Evacuate the area.
5.
Check the fuel lines, LNG tank/CNG cylinders,
and fittings to locate the leak. After the area is
cleared of natural gas and the alarm is no longer
active, have the vehicle inspected by a qualified
technician.
IMPORTANT: Do not consider the area clear
until all alarm indicators are off, and the alarm
panel light returns to green.
Silicone-based chemicals and cleaners will permanently disable the sensors. When cleaning the
vehicle, cover the sensors with a plastic covering. Keep the sensors covered until the area has
been cleared of any cleaning fumes.
Harsh chemicals and extremely high temperatures may damage the sensor.
Puncture of or damage to the seal located inside
the sensor housing will significantly shorten the
sensor life.
Frequent exposure to high concentrations of gas
will accelerate sensor deterioration.
Overhead Console
The overhead console consists of an alarm panel on
the right side and the control module on the left side.
The alarm panel has a green light, a red light, a
buzzer, and a sensor. See Fig. 16.6. It is located
within view from outside of the vehicle. The large
green light is continuously illuminated during normal
operating conditions.
Sensors
Before entering the vehicle, always verify that the
green light is illuminated. If the green light is not illuminated, do not enter the vehicle. Complete the
alarm procedure previously outlined.
Gas detection sensors are located on the cab overhead console and in the engine compartment on the
The alarm panel meets the California Highway Patrol
Title 13-2008 and NFPA 52 2010 requirements. All
16.6
Natural Gas Vehicle
5
6
7
4
AMGaDS III Plus
Gas Detection System
Power
Push
To
Silence
Gas Concentration:
SIGNIFICANT
3
Silence
Engaged
10
11
Trace
12
13
2
ne
Zo
1
ne
Zo
Shutdown
Relay
Reset
Engaged
Sensor Fault
Push To Test
8
2
1
9
04/28/2009
1.
2.
3.
4.
5.
Test Button
Sensor Fault Indicator Lights
Zone 1 Leak Indicator Lights
Power Indicator Light
Zone 2 Leak Indicator Lights
f611034
6.
7.
8.
9.
Silence Button
Silenced Engaged Light
Relay Engaged Light
Shutdown Reset Button
10.
11
12.
13.
Buzzer Alarm
Red Light
Green Light
Sensor
Fig. 16.6, AMGaDS III Plus Overhead Console
drivers and technicians using it should be trained regarding the red and green lights, and the audible
warning.
The control module, located on the left side of the
overhead console, contains the status lights and control buttons for the system. The areas that the sensors monitor are defined as Zone 1 (cab) and Zone 2
(engine compartment). The control module has lights
assigned to each zone that will illuminate if a sensor
detects a trace level leak (between 20% and 30%
LFL), a significant level leak (above 50% LFL), or if a
sensor is disconnected or malfunctioning.
• Trace Level: If either sensor detects gas fumes
at a concentration greater than 20% to 30%
LFL (1% gas in air by volume), the amber light
next to the Trace indicator for that zone will
flash. There is no buzzer alarm for a trace
level detection, and the large green light on the
alarm panel will remain illuminated.
16.7
• Significant Level: If either sensor detects gas
fumes at a concentration greater than 50% to
60% LFL (2.5% gas in air by volume), the
small red light next to the SIGNIFICANT indicator for that zone will flash. After approximately 15 seconds, the large green light on the
alarm panel will switch off, the red light will illuminate, and the buzzer will sound. All alarm
indicators will remain on as long as fumes are
detected.
• Sensor Fault: If the system detects that either
of the sensors has been disconnected or has
malfunctioned, an amber light next to the Sensor Fault indicator for that zone will illuminate.
The control module also has buttons used to test or
reset the the control module after an alarm. Red
lights next to each button indicate when they are engaged.
Natural Gas Vehicle
• Shutdown Reset: If an alarm has been acti-
vated and the Relay Engaged light is illuminated, the Shutdown Reset button will reset
the internal relay. Press the Shutdown Reset
button only after the gas has cleared, the
buzzer has turned off, and the alarm panel
light has returned to green.
• Push To Silence: If an alarm has been acti-
vated, the Push To Silence button will silence
the buzzer.
See Table 16.2 for the functions of all lights and buttons on the overhead console.
Testing
Daimler Trucks North America strongly recommends
that all operators follow California Code of Regulations (CCR) inspection requirements, regardless of
where the vehicle is operated. Per Title 13 CCR §
935 (2), gas detection systems should be tested
Item
Green Power Light
Display
Illuminated
SIGNIFICANT Gas
Concentration Lights
Red (illuminated)
Trace Gas Concentration
Lights
Amber (flashing)
Off
On
Shutdown Reset Button
—
Relay Engaged Light
On
Off
Test Button
—
Silence Button
—
Test results validating the performance of the gas
detection system within the parameters established
by the component manufacturer and NFPA 52 2010
should be maintained as a permanent part of the vehicle service records. Use of alcohol, propane, and
other harsh liquids or gases are not acceptable
methods for testing.
Always test the system and sensors after any component has been replaced, or if the vehicle has been
involved in an accident or fire. Ensure that the gas
detection system is wired directly to the battery.
It is recommended that the highest level of safety
validation be utilized if there are multiple validation
requirements in the state or locality where the vehicle
is operated or domiciled.
Control Module Functions
Function
System is on.
Unlit
Sensor Fault Lights
three times per calendar year at equal intervals. The
testing procedure should simulate the same operating environment in which the vehicle is used, with the
same gaseous fuel.
Action Required
None required.
Ensure the batteries are
connected and replace any blown
Detection system is not
fuses. If the gas detection system
functioning.
is still not functioning, replace the
system immediately.
Suspend vehicle operation
Dangerous gas concentration
immediately and follow alarm
detected.
procedures.
Use caution and monitor the
Minor gas concentration detected.
system.
Sensor is functioning properly.
None required.
Sensor has malfunctioned.
Replace the sensor immediately.
Press to reset the system only
after the gas has cleared, the
Resets the system after an alarm
buzzer has turned off, and the
activation.
alarm panel light has returned to
green.
Relay is engaged and test or
Press the Shutdown Reset button.
alarm is being cleared.
Normal condition.
None required.
Press and hold for one minute to
Tests the overhead console
to activate a test of all overhead
operation and circuitry.
console components.
Silences the alarm buzzer.
Press to silence the alarm buzzer.
16.8
Natural Gas Vehicle
Item
Silence Engaged Light
Display
Control Module Functions
Function
On
Indicates the buzzer is active but
silenced.
Off
Normal condition.
Action Required
Suspend vehicle operation
immediately and follow alarm
procedures.
None required.
Table 16.2, Control Module Functions
Overhead Console Test
Press and hold the Push To Test button for one
minute. The system will proceed with a selfdiagnostic test that will include illumination of the
Trace and SIGNIFICANT gas concentration lights,
and the sensor fault lights. Verify the large red light
and buzzer activate, and that all lights illuminate or
flash to ensure that all bulbs are operational.
4.
Ensure that the transmission shift control is in
Neutral (N), Park (P), or the Park Brake (PB) position.
5.
Without starting the engine, turn the ignition
switch to the ON position (Fig. 16.7). The electronic gauges on the instrumentation control unit
(ICU) will complete a full sweep of their dials, the
warning and indicator lights will illuminate, and
the buzzer will sound for three seconds.
Sensor Test
The gas detection system sensors must be tested
using certified test gas, which can be purchased as
part of a test kit. Testing with alcohol or heavy gases
such as butane or propane does not satisfy CCR §
935 (2) or NFPA 52 regulations.
Expose each sensor to certified test gas for at least
thirty seconds. The system will proceed through the
alarm procedure consistent with a significant leak
and the buzzer will sound after approximately fifteen
seconds. If a sensor fails to respond after exposure
to the test gas, replace the sensor.
09/12/2001
Engine Starting
NOTE: Before starting the engine, read Chapter 3 for detailed information on how to read the
instruments and Chapter 4 for detailed information on how to operate the controls. Read the
operating instructions in the engine manufacturer’s operation manual before starting the engine.
1.
Before engine start-up, complete the engine pretrip and post-trip inspections and maintenance
procedures in Chapter 11.
2.
Ensure the fuel shutoff valve is open.
3.
Set the parking brake.
f610509
Fig. 16.7, Ignition Switch Positions
6.
Turn the ignition switch to the START position.
Press down on the clutch pedal, if equipped, but
do not press down on the accelerator pedal.
Release the key the moment the engine starts.
7.
Bring the engine up to operating speed gradually
as it warms up and develops stable oil pressure.
If the vehicle has not been operated previously in
a 24-hour period, allow the vehicle to idle for five
minutes.
NOTICE
Do not rev the engine if the oil pressure gauge
indicates no oil pressure. Shut down the engine
16.9
Natural Gas Vehicle
within approximately ten seconds to avoid engine
damage.
8.
Check the oil pressure gauge for any drop in lubricating oil pressure or mechanical malfunction
in the lubricating oil system.
Major Repair and Replacement
of Parts
If a natural-gas-fueled vehicle is involved in an accident, remove the fuel tank or cylinders from service
and have them inspected by a qualified technician.
Replace any leaking or damaged fuel tanks/cylinders
and fuel lines; repair or replace leaking or damaged
fittings. Install parts and components in accordance
with the manufacturer’s instructions.
16.10
Index
Subject
Page
Subject
Page
A
C
Adjustable Steering Column . . . . . . . . . . . . . . . . . 4.14
Adjusting Headlight Aim . . . . . . . . . . . . . . . . . . . 14.2
Aftertreatment System (ATS) . . . . . . . . . . . . . . . . . 7.1
EPA07 Aftertreatment
System (ATS) . . . . . . . . . . . . . . . . . . . . . . . . 7.1
EPA10 Aftertreatment
System (ATS) . . . . . . . . . . . . . . . . . . . . . . . . 7.3
Air Bag, Optional . . . . . . . . . . . . . . . . . . . . . . . . . 5.9
Air Bag Safety Guidelines . . . . . . . . . . . . . . . . 5.10
Air Brake System . . . . . . . . . . . . . . . . . . . . . . . . . 9.1
Air Brake Operation . . . . . . . . . . . . . . . . . . . . . 9.3
Automatic Slack Adjusters . . . . . . . . . . . . . . . . . 9.3
Emergency Braking System . . . . . . . . . . . . . . . . 9.2
Meritor™ WABCO® Antilock
Braking System (ABS) for
Air Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 9.4
Parking Brakes, Tractor and
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2
Primary Air Brake System . . . . . . . . . . . . . . . . . 9.1
Secondary Air Brake System . . . . . . . . . . . . . . . 9.1
Allison MD Series . . . . . . . . . . . . . . . . . . . . . . . . 8.5
Operating Instructions, MD
Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . 8.5
Allison On-Highway
Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3
Operating Instructions, OnHighway Transmissions . . . . . . . . . . . . . . . . . 8.4
Range Inhibit Indicator, 2000
and 2400 Series . . . . . . . . . . . . . . . . . . . . . . 8.3
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . 8.3
All-Wheel-Drive Controls,
Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.12
AWD Operation Switch . . . . . . . . . . . . . . . . . . 4.12
AWD Range Switch . . . . . . . . . . . . . . . . . . . . 4.12
Cab Amenities . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10
Cab Storage . . . . . . . . . . . . . . . . . . . . . . . . . 5.10
Cup Holders . . . . . . . . . . . . . . . . . . . . . . . . . 5.10
Cab Door Locks and Handles . . . . . . . . . . . . . . . . 2.1
Cab Entry and Exit, Vehicles
With One Step . . . . . . . . . . . . . . . . . . . . . . . . . 2.4
Entering from the Driver’s
Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4
Entering from the
Passenger’s Side . . . . . . . . . . . . . . . . . . . . . 2.5
Exiting from the Driver’s Side . . . . . . . . . . . . . . . 2.4
Exiting from the Passenger’s
Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5
Cab Entry and Exit, Vehicles
With Two Steps . . . . . . . . . . . . . . . . . . . . . . . . . 2.2
Entering from the Driver’s
Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2
Entering from the
Passenger’s Side . . . . . . . . . . . . . . . . . . . . . 2.3
Exiting from the Driver’s Side . . . . . . . . . . . . . . . 2.3
Exiting from the Passenger’s
Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3
Cab Washing and Polishing . . . . . . . . . . . . . . . . . 12.1
Canadian Motor Vehicle Safety
Standard (CMVSS) Labels . . . . . . . . . . . . . . . . . 1.2
Care of Chrome Parts . . . . . . . . . . . . . . . . . . . . . 12.1
Care of Exterior Lights . . . . . . . . . . . . . . . . . . . . 12.1
Care of Fiberglass Parts . . . . . . . . . . . . . . . . . . . 12.1
Checking Headlight Aim . . . . . . . . . . . . . . . . . . . 14.1
Climate Control Panel . . . . . . . . . . . . . . . . . . . . . . 6.1
Air Conditioning, Optional . . . . . . . . . . . . . . . . . 6.4
Air Selection Switch . . . . . . . . . . . . . . . . . . . . . 6.1
Defrosting . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.3
Fan Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1
Fresh Air Mode . . . . . . . . . . . . . . . . . . . . . . . . 6.3
Recirculation Mode . . . . . . . . . . . . . . . . . . . . . 6.3
Temperature Control Switch . . . . . . . . . . . . . . . . 6.3
Clutches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1
Clutch Adjustments . . . . . . . . . . . . . . . . . . . . . 8.2
Clutch Lubrication . . . . . . . . . . . . . . . . . . . . . . 8.2
Clutch Operation . . . . . . . . . . . . . . . . . . . . . . . 8.1
Clutch Wear . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2
Sachs Hydraulic Clutch . . . . . . . . . . . . . . . . . . . 8.2
Cold-Weather Operation . . . . . . . . . . . . . . . . . . . 7.13
Cold-Weather Starting . . . . . . . . . . . . . . . . . . . . . 7.10
Collision Warning System,
Eaton VORAD EVT–300 . . . . . . . . . . . . . . . . . . 3.17
Driver Display Unit (DDU) . . . . . . . . . . . . . . . . 3.18
In Case of Accident . . . . . . . . . . . . . . . . . . . . 3.21
Maintenance and
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . 3.21
B
Back-of-Cab Access . . . . . . . . . . . . . . . . . . . . . . . 2.5
Climbing Down from Backof-Cab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.6
Entering Back-of-Cab . . . . . . . . . . . . . . . . . . . . 2.6
Battery Access . . . . . . . . . . . . . . . . . . . . . . . . . . 2.6
Battery Compartment . . . . . . . . . . . . . . . . . . . . 2.6
Cab (Battery) Isolation
Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.13
Meritor™ WABCO® Antilock
Braking System (ABS) . . . . . . . . . . . . . . . . . 4.13
Parking Brake Control Valve . . . . . . . . . . . . . . . 4.13
Trailer Air Supply Valve . . . . . . . . . . . . . . . . . . 4.13
Trailer Brake Lever . . . . . . . . . . . . . . . . . . . . . 4.13
I-1
Index
Subject
Page
Side Sensor Display . . . . . . . . . . . . . . . . . . . .
Special Road Situations . . . . . . . . . . . . . . . . .
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . .
Dash-Mounted Switches . . . . . . . . . . . . . . . . .
Shift Knob Controls, Optional . . . . . . . . . . . . . .
3.20
3.20
7.11
7.11
7.12
D
Dashboard Care . . . . . . . . . . . . . . . . . . . . . . . . 12.1
E
AutoShift™
Eaton Fuller
. . . . . . . . . . . . . . . . . . . . 8.12
Automatic Mode . . . . . . . . . . . . . . . . . . . . . . . 8.13
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . 8.13
Push-Button Shift Selector . . . . . . . . . . . . . . . . 8.12
Selecting Gears . . . . . . . . . . . . . . . . . . . . . . . 8.14
Eaton Fuller Range-Shift
Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . 8.9
General Information, RangeShift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.9
Operation, Deep-Reduction
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11
Operation, Range-Shift . . . . . . . . . . . . . . . . . . 8.10
Eaton Fuller UltraShift . . . . . . . . . . . . . . . . . . . . . 8.15
General Information,
UltraShift ASW . . . . . . . . . . . . . . . . . . . . . . 8.15
General Information,
UltraShift DM . . . . . . . . . . . . . . . . . . . . . . . 8.15
Operation, UltraShift . . . . . . . . . . . . . . . . . . . . 8.16
UltraShift Diagnostics . . . . . . . . . . . . . . . . . . . 8.20
Eaton® Fuller® Straight-Shift
Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . 8.8
General Information,
Straight-Shift . . . . . . . . . . . . . . . . . . . . . . . . 8.8
Operation, Straight-Shift . . . . . . . . . . . . . . . . . . 8.8
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
Emergencies (HEV) . . . . . . . . . . . . . . . . . . . . . . 15.3
Emergency Shutdown . . . . . . . . . . . . . . . . . . . 15.3
In Case of an Accident or
Fire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.3
Emergency Filter Replacement,
Davco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.1
Emergency Kit, Optional . . . . . . . . . . . . . . . . . . . 13.1
Emergency Starting With
Jumper Cables . . . . . . . . . . . . . . . . . . . . . . . . 13.2
Engine Braking . . . . . . . . . . . . . . . . . . . . . . . . . 7.14
Engine Break-In . . . . . . . . . . . . . . . . . . . . . . . . . 7.10
Engine Operation . . . . . . . . . . . . . . . . . . . . . . . . 7.10
Engine Shutdown . . . . . . . . . . . . . . . . . . . . . . . . 7.14
Engine Starting . . . . . . . . . . . . . . . . . . . . . . . . . 16.9
Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.9
Subject
Page
Starting Precautions, All
Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.10
EPA Emission Control . . . . . . . . . . . . . . . . . . . . . . 1.2
EPA07 and EPA10 Emission
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
Vehicle Noise Emission
Control Label . . . . . . . . . . . . . . . . . . . . . . . . 1.2
Exhaust Braking Systems . . . . . . . . . . . . . . . . . . 7.15
Exhaust Brake Switch . . . . . . . . . . . . . . . . . . . 7.15
Mercedes-Benz Exhaust
Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.16
Pacbrake® Exhaust Brake . . . . . . . . . . . . . . . . 7.17
F
Federal Motor Vehicle Safety
Standard (FMVSS) Labels . . . . . . . . . . . . . . . . . 1.1
Fifth Wheel Coupling . . . . . . . . . . . . . . . . . . . . . 10.1
Fontaine and Holland Fifth
Wheels Coupling . . . . . . . . . . . . . . . . . . . . . 10.1
Jost Fifth Wheel Coupling . . . . . . . . . . . . . . . . 10.3
Fifth Wheel Slide . . . . . . . . . . . . . . . . . . . . . . . . 10.7
Air Slide Operation . . . . . . . . . . . . . . . . . . . . . 10.9
Manual Slide Operation . . . . . . . . . . . . . . . . . . 10.7
Fifth Wheel Uncoupling . . . . . . . . . . . . . . . . . . . . 10.4
Air-Actuated Uncoupling . . . . . . . . . . . . . . . . . 10.5
Manual Uncoupling . . . . . . . . . . . . . . . . . . . . . 10.4
Fifth Wheels, General
Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.1
Air-Suspension Dump Valve . . . . . . . . . . . . . . . 10.1
Fifth Wheel Lubrication . . . . . . . . . . . . . . . . . . 10.1
Fire Extinguisher . . . . . . . . . . . . . . . . . . . . . . . . 13.1
Fire in the Cab . . . . . . . . . . . . . . . . . . . . . . . . . 13.6
In Case of a Cab Fire . . . . . . . . . . . . . . . . . . . 13.6
Freightliner SmartShift Shift
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15
General Information,
SmartShift . . . . . . . . . . . . . . . . . . . . . . . . . 8.15
Fuel Tank Filling Procedures . . . . . . . . . . . . . . . . 16.2
CNG Vehicle Fueling . . . . . . . . . . . . . . . . . . . 16.2
LNG Vehicle Fueling . . . . . . . . . . . . . . . . . . . . 16.3
Fuse Identification . . . . . . . . . . . . . . . . . . . . . . . . 2.8
Main Fuse Box/PDM . . . . . . . . . . . . . . . . . . . . 2.8
Trailer and Taillight Fuse
Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8
G
Gas Detection System . . . . . . . . . . . . . . . . . . . .
Alarm Procedure . . . . . . . . . . . . . . . . . . . . . .
Overhead Console . . . . . . . . . . . . . . . . . . . . .
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16.5
16.5
16.6
16.6
16.8
I-2
Index
Subject
Page
General Information . . . . . . . . . . . . . . . . . . . . . . 16.1
Grab Handles and Access
Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1
H
Hazard Warning Lights . . . . . . . . . . . . . . . . . . . . 13.1
Heater/Air Conditioner Control
Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.15
High-Altitude Operation . . . . . . . . . . . . . . . . . . . . 7.13
Hood Opening and Closing . . . . . . . . . . . . . . . . . . 2.7
To Close the Hood . . . . . . . . . . . . . . . . . . . . . . 2.7
To Open the Hood . . . . . . . . . . . . . . . . . . . . . . 2.7
Horn Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7
Air Horn, Optional . . . . . . . . . . . . . . . . . . . . . . 4.7
Electric Horn . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7
Hybrid Electric Vehicle (HEV)
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.1
Cooling System . . . . . . . . . . . . . . . . . . . . . . . 15.1
Electric Power Take-Off
(ePTO) . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.1
High-Voltage Safety
Features . . . . . . . . . . . . . . . . . . . . . . . . . . 15.1
Regenerative Braking . . . . . . . . . . . . . . . . . . . 15.1
Hybrid System Fault Lamps
(HEV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.2
Hydraulic Brake System . . . . . . . . . . . . . . . . . . . . 9.6
General Information . . . . . . . . . . . . . . . . . . . . . 9.6
Meritor™ WABCO® Antilock
Braking System (ABS) for
Hydraulic Brakes . . . . . . . . . . . . . . . . . . . . . . 9.7
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.7
I
Ignition Switch and Key . . . . . . . . . . . . . . . . . . . .
Instrumentation Control Unit . . . . . . . . . . . . . . . . . .
Dash Message Center . . . . . . . . . . . . . . . . . . .
Ignition Sequence . . . . . . . . . . . . . . . . . . . . . .
Mode/Reset Switch . . . . . . . . . . . . . . . . . . . . .
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
3.1
3.1
3.2
3.5
3.5
J
Jumpstarting (HEV) . . . . . . . . . . . . . . . . . . . . . . 15.3
L
Lighting Controls . . . . . . . . . . . . . . . . . . . . . . . . .
Control Panels . . . . . . . . . . . . . . . . . . . . . . . .
Exterior Light Controls . . . . . . . . . . . . . . . . . . .
Interior Lights and Light
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I-3
4.1
4.1
4.2
4.4
Subject
Page
M
Major Repair and Replacement
of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.10
Mercedes-Benz Automated
Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . 8.22
AGS Diagnostics . . . . . . . . . . . . . . . . . . . . . . 8.27
General Information, AGS . . . . . . . . . . . . . . . . 8.22
Operation, AGS . . . . . . . . . . . . . . . . . . . . . . . 8.23
Mercedes-Benz Manual
Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . 8.22
Meritor™ Drive Axles . . . . . . . . . . . . . . . . . . . . . . 8.28
Axle Shift . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.30
Drive Axles With Differential
Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.28
Tandem Drive Axles With
Interaxle Lock . . . . . . . . . . . . . . . . . . . . . . . 8.29
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1
Down View Mirror, Optional . . . . . . . . . . . . . . . . 5.1
Mirror Heat Switch, Optional . . . . . . . . . . . . . . . 5.1
Power Mirrors, Optional . . . . . . . . . . . . . . . . . . 5.1
Multifunction Turn Signal Switch . . . . . . . . . . . . . . . 4.5
Hazard Warning Flasher . . . . . . . . . . . . . . . . . . 4.7
Headlight High Beams . . . . . . . . . . . . . . . . . . . 4.6
Turn-Signal Controls . . . . . . . . . . . . . . . . . . . . . 4.5
Windshield Wiper/Washer
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6
O
Optional Instruments . . . . . . . . . . . . . . . . . . . . . .
Ammeter . . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle Oil Temperature
Gauges, Forward and Rear . . . . . . . . . . . . . .
Digital Clock . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intake-Air Restriction
Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pyrometer . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turbocharger Boost
Pressure Gauge . . . . . . . . . . . . . . . . . . . . .
Other Dash-Mounted Controls . . . . . . . . . . . . . . .
CB Radio Connections . . . . . . . . . . . . . . . . . .
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . .
Suspension Autofill Override
Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension Dump Switch . . . . . . . . . . . . . . . .
Windshield-Fan Switches,
Optional . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overhead Instrument Panel,
Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.14
3.14
3.14
3.14
3.15
3.16
3.16
3.17
4.14
4.14
4.14
4.15
4.15
4.14
3.10
Index
Subject
Page
P
Power Takeoff (PTO) Governor . . . . . . . . . . . . . . . 7.13
Powertrain Controls . . . . . . . . . . . . . . . . . . . . . . . 4.8
After-Treatment System
(ATS) Request/Inhibit
Regen Switch . . . . . . . . . . . . . . . . . . . . . . . . 4.8
Axle Switches . . . . . . . . . . . . . . . . . . . . . . . . 4.10
Cruise Control Switches . . . . . . . . . . . . . . . . . . 4.8
Engine Brake Switch,
Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.8
Engine Fan Switch, Optional . . . . . . . . . . . . . . . 4.9
Exhaust Brake Switch,
Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.9
Transmission Controls . . . . . . . . . . . . . . . . . . . 4.10
Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . 14.1
Pretrip and Post-Trip Inspection
Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1
Pretrip and Post-Trip
Maintenance Procedures . . . . . . . . . . . . . . . . . . 11.3
Daily Pretrip Inspection and
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 11.3
Monthly Post-Trip Inspection
and Maintenance . . . . . . . . . . . . . . . . . . . . 11.17
Weekly Post-Trip Inspection
and Maintenance . . . . . . . . . . . . . . . . . . . . 11.15
Subject
Page
Fuel/Diesel Exhaust Fluid
(DEF) Gauge, EPA10 . . . . . . . . . . . . . . . . . . 3.12
Primary and Secondary Air
Pressure Gauges . . . . . . . . . . . . . . . . . . . . . 3.13
Transmission Fluid
Temperature Gauge . . . . . . . . . . . . . . . . . . . 3.12
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.13
Starting After Extended
Shutdown or Oil Change . . . . . . . . . . . . . . . . . . 7.10
Starting, and Engine Shutdown
(HEV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.2
Engine Shutdown . . . . . . . . . . . . . . . . . . . . . . 15.2
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.2
The Cranking System . . . . . . . . . . . . . . . . . . . 15.2
Steering System . . . . . . . . . . . . . . . . . . . . . . . . . 9.1
Power Steering System . . . . . . . . . . . . . . . . . . 9.1
Steering Wheel Adjustment . . . . . . . . . . . . . . . . 9.1
T
Tire and Rim Labels . . . . . . . . . . . . . . . . . . . . . .
Towing (HEV) . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Towing Hookup . . . . . . . . . . . . . . . . . . .
Rear Towing Hookup . . . . . . . . . . . . . . . . . . .
. 1.2
15.3
13.5
13.5
13.5
S
V
Safety Precautions (HEV) . . . . . . . . . . . . . . . . . . 15.2
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . 16.1
Seat Belts and Tether Belts . . . . . . . . . . . . . . . . . . 5.7
General Information . . . . . . . . . . . . . . . . . . . . . 5.7
Seat Belt Inspection . . . . . . . . . . . . . . . . . . . . . 5.7
Seat Belt Operation . . . . . . . . . . . . . . . . . . . . . 5.7
Seat Controls . . . . . . . . . . . . . . . . . . . . . . . . . . 4.16
Bench Seat Adjustment
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.16
Suspension Seat Adjustment
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.16
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2
Bench Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4
Bostrom Seat . . . . . . . . . . . . . . . . . . . . . . . . . 5.4
General Information . . . . . . . . . . . . . . . . . . . . . 5.2
National 2000 Series Seat . . . . . . . . . . . . . . . . . 5.5
Sears Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5
Speedometer and Tachometer . . . . . . . . . . . . . . . 3.10
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . 3.10
Tachometer, Optional . . . . . . . . . . . . . . . . . . . 3.11
Standard Instruments . . . . . . . . . . . . . . . . . . . . . 3.11
Coolant Temperature Gauge . . . . . . . . . . . . . . . 3.11
Engine Oil Pressure Gauge . . . . . . . . . . . . . . . 3.11
Fuel Level Gauge, PreEPA10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.12
Vehicle Specification Decal . . . . . . . . . . . . . . . . . . 1.1
Velour Upholstery Cleaning . . . . . . . . . . . . . . . . . 12.2
Chewing Gum or Wax . . . . . . . . . . . . . . . . . . . 12.3
Grease and Oil-Based Stains . . . . . . . . . . . . . . 12.3
Mildew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.3
Sugar and Water-Based
Stains . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.3
Vinyl Upholstery Cleaning . . . . . . . . . . . . . . . . . . 12.2
Ball Point Ink . . . . . . . . . . . . . . . . . . . . . . . . . 12.2
Chewing Gum . . . . . . . . . . . . . . . . . . . . . . . . 12.2
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . 12.2
Nail Polish and Nail Polish
Remover . . . . . . . . . . . . . . . . . . . . . . . . . . 12.2
Ordinary Dirt . . . . . . . . . . . . . . . . . . . . . . . . . 12.2
Paint, Shoe Heel Marks . . . . . . . . . . . . . . . . . 12.2
Shoe Polish . . . . . . . . . . . . . . . . . . . . . . . . . 12.2
Sulfide Stains . . . . . . . . . . . . . . . . . . . . . . . . 12.2
Tars, Asphalts, and Creosote . . . . . . . . . . . . . . 12.2
W
Warning and Indicator Lights . . . . . . . . . . . . . . . . .
Check Engine Indicator . . . . . . . . . . . . . . . . . . .
Emergency Buzzer . . . . . . . . . . . . . . . . . . . . . .
Engine Protection Warning . . . . . . . . . . . . . . . .
3.6
3.6
3.8
3.6
I-4
Index
Subject
Page
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1
Windshield Washer Reservoir . . . . . . . . . . . . . . . . 5.11
I-5
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