l-line and a-line maintenance manual

l-line and a-line maintenance manual
L-LINE AND A-LINE MAINTENANCE MANUAL
Models: L7500
L7501
L8500
L8511
L8513
L9500
L9501
L9511
L9513
L9522
A9500
A9522
STI-383-1 (10/08P)
Published by
Daimler Trucks North America LLC
4747 N. Channel Ave.
Portland, OR 97217
Printed in U.S.A.
Foreword
Scheduled maintenance provides a key element for the safe operation of your vehicle. A proper
maintenance program also helps to minimize downtime and to safeguard warranties. This
maintenance manual provides information necessary for years of safe, reliable, and cost-efficient
vehicle operation.
IMPORTANT: The maintenance operations in this manual are not all-inclusive. Also
refer to other component and body manufacturers’ instructions for specific inspection
and maintenance instructions.
Perform the operations in this maintenance manual at scheduled intervals. Perform the pretrip
and post-trip inspections, and daily/weekly/monthly maintenance, as outlined in the vehicle
driver’s manual. Major components, such as engines, transmissions, and rear axles, are covered
in their own maintenance and operation manuals, that are provided with the vehicle. Perform any
maintenance operations listed at the intervals scheduled in those manuals. Your Sterling
Dealership has the qualified technicians and equipment to perform this maintenance for you.
They can also set up a scheduled maintenance program tailored specifically to your needs.
Optionally, they can assist you in learning how to perform these maintenance procedures.
IMPORTANT: Descriptions and specifications in this manual were in effect at the time of
printing. Daimler Trucks North America LLC 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 revision and editions without notice.
Refer to www.Daimler-TrucksNorthAmerica.com and www.SterlingTrucks.com for more information, or contact Daimler Trucks North America LLC at the address below.
Environmental Concerns and Recommendations
Whenever you see instructions in this manual to discard materials, you should attempt to reclaim
and recycle them. To preserve our environment, follow appropriate environmental rules and
regulations when disposing of materials.
NOTICE: Parts Replacement Considerations
Do not replace suspension, axle, or steering parts (such as springs, wheels, hubs, and steering
gears) with used parts. Used parts may have been subjected to collisions or improper use and
have undetected structural damage.
© 1998–2008 Daimler Trucks North America LLC
All rights reserved. No part of this publication, in whole or in 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. Daimler Trucks North America LLC is a Daimler company.
Daimler Trucks North America LLC
Service Systems and Documentation (POC-SSD)
P.O. Box 3849
Portland, OR 97208–3849
Introduction
Descriptions of Service Publications
Daimler Trucks North America LLC distributes the following major service publications in paper and electronic
(via ServicePro®) formats.
Workshop/Service
Manual
Workshop/service manuals contain service and repair information for all vehicle
systems and components, except for major components such as engines, transmissions, and rear axles. Each workshop/service manual section is divided into
subjects that can include general information, principles of operation, removal,
disassembly, assembly, installation, and specifications.
Maintenance Manual
Maintenance manuals contain routine maintenance procedures and intervals for
vehicle components and systems. They have information such as lubrication
procedures and tables, fluid replacement procedures, fluid capacities, specifications, and procedures for adjustments and for checking the tightness of fasteners. Maintenance manuals do not contain detailed repair or service information.
Driver’s/Operator’s
Manual
Driver’s/operator’s manuals contain information needed to enhance the driver’s
understanding of how to operate and care for the vehicle and its components.
Each manual contains a chapter that covers pretrip and post-trip inspections,
and daily, weekly, and monthly maintenance of vehicle components.
Driver’s/operator’s manuals do not contain detailed repair or service information.
Service Bulletins
Service bulletins provide the latest service tips, field repairs, product improvements, and related information. Some service bulletins are updates to information in the workshop/service manual. These bulletins take precedence over
workshop/service manual information, until the latter is updated; at that time, the
bulletin is usually canceled. The service bulletins manual is available only to
dealers. When doing service work on a vehicle system or part, check for a valid
service bulletin for the latest information on the subject.
IMPORTANT: Before using a particular service bulletin, check the current
service bulletin validity list to be sure the bulletin is valid.
Parts Technical Bulletins
Parts technical bulletins provide information on parts. These bulletins contain
lists of parts and BOMs needed to do replacement and upgrade procedures.
Web-based repair, service, and parts documentation can be accessed using the following applications on the
AccessSterling.com website.
ServicePro
ServicePro® provides Web-based access to the most up-to-date versions of the
publications listed above. In addition, the Service Solutions feature provides diagnostic assistance with Symptoms Search, by connecting to a large knowledge
base gathered from technicians and service personnel. Search results for both
documents and service solutions can be narrowed by initially entering vehicle
identification data.
PartsPro
PartsPro® is an electronic parts catalog system, showing the specified vehicle’s
build record.
EZWiring
EZWiring™ makes Sterling, Freightliner, Freightliner Custom Chassis Corporation, Thomas Built Buses, and Western Star products’ wiring drawings and floating pin lists available online for viewing and printing. EZWiring can also be accessed from within PartsPro.
L-Line and A-Line Maintenance Manual, October 2008
I–1
Introduction
Descriptions of Service Publications
Warranty-related service information available on the AccessSterling.com website includes the following documentation.
Recall Campaigns
Recall campaigns cover situations that involve service work or replacement of
parts in connection with a recall notice. These campaigns pertain to matters of
vehicle safety. All recall campaigns are distributed to dealers; customers receive
notices that apply to their vehicles.
Field Service Campaigns
Field service campaigns are concerned with non-safety-related service work or
replacement of parts. All field service campaigns are distributed to dealers; customers receive notices that apply to their vehicles.
I–2
L-Line and A-Line Maintenance Manual, October 2008
Introduction
Page Description
For an example of an L-Line and A-Line Maintenance Manual page, see Fig. 1.
A
B
C
D
E
f020080
08/25/98
A.
B.
C.
D.
E.
Maintenance Operation Number consists of the Group Number followed by the Sequence Number
Group Title
Group Number
Release Date
Group Number/Page Number
Fig. 1, Example of an L-Line and A-Line Maintenance Manual Page
L-Line and A-Line Maintenance Manual, October 2008
I–3
Introduction
Maintenance Manual Contents
Group No.
Group Title
00 . . . . . . . . . . . . . . . . . . . . . . General Information
01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine
09 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Intake
13 . . . . . . . . . . . . . . . . . . . . . . . . . Air Compressor
15 . . . . . . . . . . . . . . . . . . . Alternators and Starters
20 . . . . . . . . . . . . . . . . . . . Engine Cooling/Radiator
25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clutch
26 . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmission
31 . . . . . . . . . . . . . . . . . . . Frame and Fifth Wheel
32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . Suspension
33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front Axle
35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear Axle
40 . . . . . . . . . . . . . . . . . . . . . . . . Wheels and Tires
41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Driveline
42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brakes
46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steering
47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel
49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust
54 . . . . . . . . . . Electrical, Instruments, and Controls
72 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Doors
83 . . . . . . . . . . . . . . . . . Heater and Air Conditioner
88 . . . . . . . . . . . . . . Hood, Grille, and Cab Fenders
I–4
L-Line and A-Line Maintenance Manual, October 2008
General Information
00
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Determining Scheduled Maintenance Intervals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–01
Initial Maintenance (IM) Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–06
Lubrication and Fluid Level Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–04
M1 Maintenance Interval Operations Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–07
M2 Maintenance Interval Operations Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–08
M3 Maintenance Interval Operations Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–09
M4 Maintenance Interval Operations Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–10
Maintenance Operation Sets Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–05
Maintenance Service Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–02
Metric/U.S. Customary Conversion Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–13
Noise Emission Controls Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–11
Torque Specifications Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–14
Vehicle Maintenance Schedule Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–03
Verification of Inspections Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00–12
L-Line and A-Line Maintenance Manual, January 2007
00
General Information
Determining Scheduled Maintenance Intervals: 00–01
Determining Scheduled
Maintenance Intervals
Performing regular maintenance on your Sterling vehicle will help ensure that your Sterling vehicle delivers safe reliable service and optimum performance
for years to come. Failure to follow a regular maintenance program can result in inefficient operation and
unscheduled down time.
To determine the correct maintenance intervals for
your vehicle you must first determine the type of service or conditions the vehicle will be operating in.
Generally, most vehicles operate under conditions
that fall within one of the three types of service described. Before placing your new vehicle in service,
determine the type of service (Service Schedule I, II,
or III) that applies to the intended use of the vehicle.
After determining the vehicle’s type of service, refer
to the service schedule table or the vehicle maintenance schedule table, to determine how often maintenance should be performed.
Service Schedule III (long-haul transport) is for vehicles that annually travel more than 60,000 miles
(100 000 kilometers) with minimal city or stop-and-go
operation. Examples of Schedule III (long-haul transport) usage are: regional delivery that is mostly freeway miles; interstate transport; or any road operation
with high annual mileage.
NOTE: Maintenance instructions in this manual
are based on average vehicle use and normal
operating conditions. Unusual vehicle operating
conditions may require service at more frequent
intervals.
When the vehicle reaches the distance given for a
maintenance interval, see the "Maintenance Interval
Operations Table" for a list of the maintenance operations to be performed at that maintenance interval. Use the maintenance operation reference numbers to find detailed instructions in the manual on
each operation.
Types of Service
Service Schedule I (severe service) applies to vehicles that annually travel less than 6000 miles (10
000 kilometers) or that operate under severe conditions. Examples of Schedule I (severe service) usage
include: operation on extremely poor roads or where
there is heavy dust accumulation; constant exposure
to extreme hot, cold, salt-air, or other extreme climates; frequent short-distance travel; constructionsite operation; city operation (fire truck); or farm
operation.
Service Schedule II (short-haul transport) applies to
vehicles that annually travel less than 60,000 miles
(100 000 kilometers) and operate under normal conditions. Examples of Schedule II (short-haul transport) usage are: operation primarily in cities and
densely populated areas; local transport with infrequent freeway travel; or high percentage of stopand-go travel.
L-Line and A-Line Maintenance Manual, January 2007
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00
General Information
Maintenance Service Table: 00–02
Maintenance Service Table
Service Schedule
Schedule I* — (severe service) vehicles
that annually travel up to 6000 miles
(10 000 km)
Schedule II† — (short-haul transport)
vehicles that annually travel up to
60,000 miles (100 000 km)
Schedule III† — (long-haul transport)
vehicles that annually travel over
60,000 miles (100 000 km)
Maintenance Intervals
Maintenance Interval
Operation
Frequency
Miles
km
Hours
Initial Maintenance (IM)
first
1000
1600
100
Maintenance 1 (M1)
every
1000
1600
100
Maintenance 2 (M2)
every
5000
8000
500
Maintenance 3 (M3)
every
10,000
16 000
1000
Maintenance 4 (M4)
every
20,000
32 000
2000
Initial Maintenance (IM)
first
9500
15 000
Maintenance 1 (M1)
every
9500
15 000
Maintenance 2 (M2)
every
37,500
60 000
Maintenance 3 (M3)
every
75,000
120 000
Maintenance 4 (M4)
every
150,000
240 000
Initial Maintenance (IM)
first
12,500
20 000
Maintenance 1 (M1)
every
12,500
20 000
Maintenance 2 (M2)
every
50,000
80 000
Maintenance 3 (M3)
every
100,000
160 000
Maintenance 4 (M4)
every
300,000
480 000
—
—
* For Schedule I (severe service) vehicles equipped with an hourmeter, use maintenance intervals based on hours of operation rather than distance traveled.
† Use Schedule I (severe service) maintenance intervals for vehicles that operate under severe conditions, such as extremely poor roads, heavy dust accumu-
lation, extreme climate, frequent short distance travel, construction-site operation, city operation (garbage truck), or farm operation.
Table 1, Maintenance Service Table
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L-Line and A-Line Maintenance Manual, January 2007
00
General Information
Vehicle Maintenance Schedule Tables: 00–03
1st through 35th Vehicle Maintenance Intervals for Service Schedule I
Maint.
Number
Required Maintenance Operation
Interval
1st
Service Date
Service I
Miles
km
Hours
Initial Maintenance (IM) and M1
1000
1600
100
2nd
M1
2000
3200
200
3rd
M1
3000
4800
300
4th
M1
4000
6400
400
5th
M1 and M2
5000
8000
500
6th
M1
6000
9600
600
7th
M1
7000
11 200
700
8th
M1
8000
12 800
800
9th
M1
9000
14 400
900
10th
M1, M2 and M3
10,000
16 000
1000
11th
M1
11,000
17 600
1100
12th
M1
12,000
19 200
1200
13th
M1
13,000
20 800
1300
14th
M1
14,000
22 400
1400
15th
M1 and M2
15,000
24 000
1500
16th
M1
16,000
25 600
1600
17th
M1
17,000
27 200
1700
18th
M1
18,000
28 800
1800
19th
M1
19,000
30 400
1900
20th
M1, M2, M3 and M4
20,000
32 000
2000
21st
M1
21,000
33 600
2000
22nd
M1
22,000
35 200
2200
23rd
M1
23,000
36 800
2300
24th
M1
24,000
38 400
2400
25th
M1 and M2
25,000
40 000
2500
26th
M1
26,000
41 600
2600
27th
M1
27,000
43 200
2700
28th
M1
28,000
44 800
2800
29th
M1
29,000
46 400
2900
30th
M1, M2 and M3
30,000
48 000
3000
31st
M1
31,000
49 600
3100
32nd
M1
32,000
51 200
3200
33rd
M1
33,000
52 800
3300
34th
M1
34,000
54 400
3400
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00
General Information
Vehicle Maintenance Schedule Tables: 00–03
1st through 35th Vehicle Maintenance Intervals for Service Schedule I
Maint.
Number
Required Maintenance Operation
Interval
35th
M1 and M2
Service Date
Service I
Miles
km
Hours
35,000
56 000
3500
Table 2, 1st through 35th Vehicle Maintenance Intervals for Service Schedule I
36th through 70th Vehicle Maintenance Intervals for Service Schedule I
Maint.
Number
Required Maintenance Operation
Interval
36th
37th
38th
Service Date
Service I
Miles
km
Hours
M1
36,000
57 600
3600
M1
37,000
59 200
3700
M1
38,000
60 800
3800
39th
M1
39,000
62 400
3900
40th
M1, M2, M3 and M4
40,000
64 000
4000
41st
M1
41,000
65 600
4100
42nd
M1
42,000
67 200
4200
43rd
M1
43,000
68 800
4300
44th
M1
44,000
70 400
4400
45th
M1 and M2
45,000
72 000
4500
46th
M1
46,000
73 600
4600
47th
M1
47,000
75 200
4700
48th
M1
48,000
76 800
4800
49th
M1
49,000
78 400
4900
50th
M1, M2 and M3
50,000
80 000
5000
51st
M1
51,000
82 000
5100
52nd
M1
52,000
83 700
5200
53rd
M1
53,000
85 300
5300
54th
M1
54,000
86 900
5400
55th
M1 and M2
55,000
88 500
5500
56th
M1
56,000
90 100
5600
57th
M1
57,000
91 700
5700
58th
M1
58,000
93 300
5800
59th
M1
59,000
94 900
5900
60th
M1, M2, M3 and M4
60,000
96 500
6000
61st
M1
61,000
98 200
6100
62nd
M1
62,000
99 800
6200
63rd
M1
63,000
101 400
6300
64th
M1
64,000
103 000
6400
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L-Line and A-Line Maintenance Manual, January 2007
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General Information
Vehicle Maintenance Schedule Tables: 00–03
36th through 70th Vehicle Maintenance Intervals for Service Schedule I
Maint.
Number
Required Maintenance Operation
Interval
65th
Service Date
Service I
Miles
km
Hours
M1 and M2
65,000
104 600
6500
66th
M1
66,000
106 200
6600
67th
M1
67,000
107 800
6700
68th
M1
68,000
109 400
6800
69th
M1
69,000
111 000
6900
M1, M2 and M3
70,000
112 700
7000
70th
Table 3, 36th through 70th Vehicle Maintenance Intervals for Service Schedule I
71st through 100th Vehicle Maintenance Intervals for Service Schedule I
Maint.
Number
Required Maintenance Operation
Interval
71st
Service Date
Service I
Miles
km
Hours
M1
71,000
114 300
7100
72nd
M1
72,000
115 900
7200
73rd
M1
73,000
117 500
7300
74th
M1
74,000
119 100
7400
75th
M1 and M2
75,000
120 700
7500
76th
M1
76,000
122 300
7600
77th
M1
77,000
123 900
7700
78th
M1
78,000
125 500
7800
79th
M1
79,000
127 100
7900
80th
M1, M2, M3 and M4
80,000
128 700
8000
81st
M1
81,000
130 400
8100
82nd
M1
82,000
132 000
8200
83rd
M1
83,000
134 000
8300
84th
M1
84,000
135 200
8400
85th
M1 and M2
85,000
137 000
8500
86th
M1
86,000
138 400
8600
87th
M1
87,000
140 000
8700
88th
M1
88,000
141 600
8800
89th
M1
89,000
143 200
8900
90th
M1, M2 and M3
90,000
144 800
9000
91st
M1
91,000
146 500
9100
92nd
M1
92,000
148 100
9200
93rd
M1
93,000
150 000
9300
94th
M1
94,000
151 300
9400
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General Information
Vehicle Maintenance Schedule Tables: 00–03
71st through 100th Vehicle Maintenance Intervals for Service Schedule I
Maint.
Number
Required Maintenance Operation
Interval
95th
Service Date
Service I
Miles
km
Hours
M1 and M2
95,000
153 000
9500
96th
M1
96,000
155 000
9600
97th
M1
97,000
156 100
9700
98th
M1
98,000
157 700
9800
99th
M1
99,000
159 300
9900
M1, M2, M3 and M4
100,000
160 900
10 000
100th
Table 4, 71st through 100th Vehicle Maintenance Intervals for Service Schedule I
Vehicle Maintenance Intervals for Service Schedule II
Maint.
Number
Required Maintenance Operation Interval
1st
Initial Maintenance (IM) and M1
Service Date
Miles
km
10,000
16 000
2nd
M1
19,000
30 000
3rd
M1
28,000
45 000
4th
M1 and M2
38,000
60 000
5th
M1
47,000
75 000
6th
M1
56,000
90 000
7th
M1
66,000
105 000
8th
M1, M2 and M3
75,000
120 000
9th
M1
84,000
135 000
10th
M1
94,000
150 000
11th
M1
103,000
165 000
12th
M1 and M2
112,000
180 000
13th
M1
122,000
195 000
14th
M1
131,000
210 000
15th
M1
141,000
225 000
16th
M1, M2, M3 and M4
150,000
240 000
Table 5, Vehicle Maintenance Intervals for Service Schedule II
Vehicle Maintenance Intervals for Service Schedule III
Maint.
Number
Required Maintenance Operation Interval
1st
Miles
km
Initial Maintenance (IM) and M1
12,500
20 000
2nd
M1
25,000
40 000
3rd
M1
37,000
60 000
4th
M1 and M2
50,000
80 000
00/6
Service Date
L-Line and A-Line Maintenance Manual, January 2007
00
General Information
Vehicle Maintenance Schedule Tables: 00–03
Vehicle Maintenance Intervals for Service Schedule III
Maint.
Number
Required Maintenance Operation Interval
5th
6th
Service Date
Miles
km
M1
62,000
100 000
M1
75,000
120 000
7th
M1
87,000
140 000
8th
M1, M2 and M3
100,000
160 000
9th
M1
112,000
180 000
10th
M1
125,000
200 000
11th
M1
137,000
220 000
12th
M1 and M2
150,000
240 000
13th
M1
162,000
260 000
14th
M1
175,000
280 000
15th
M1
187,000
300 000
16th
M1, M2 and M3
200,000
320 000
17th
M1
212,000
340 000
18th
M1
225,000
360 000
19th
M1
237,000
380 000
20th
M1 and M2
250,000
400 000
21st
M1
262,000
420 000
22nd
M1
275,000
440 000
23rd
M1
287,000
460 000
24th
M1, M2, M3 and M4
300,000
480 000
Table 6, Vehicle Maintenance Intervals for Service Schedule III
L-Line and A-Line Maintenance Manual, January 2007
00/7
00
General Information
Lubrication and Fluid Level Check: 00–04
Table 7 summarizes all operations that must be performed to complete lubrication and fluid level checks
in the M1 maintenance interval for all service schedules.
Maintenance operation numbers given in the table
are reference numbers used to help you find detailed
instructions in the manual on the lubrication or fluid
check.
M1 Maintenance Operation 00–04, Lubrication and Fluid Level Check for Service Schedules I, II, and III
Maintenance
Operation
Number
Operation Description
25–01
Clutch Release Bearing Lubricating
26–04
Transmission Breather and Oil Level Checking
31–02
Fifth Wheel Lubricating
31–05
Trailer Electrical Connector Lubricating
32–02
Suspension Lubricating
33–01
Knuckle Pin Lubricating
33–02
Tie-Rod End Inspecting and Lubricating
35–01
Axle Breather and Lubricant Level Checking
41–02
Driveline Lubricating
42–02
Automatic Slack Adjuster Lubricating and Checking
46–01
Steering Driveline Lubricating
46–02
Drag Link and Power Steering Cylinder Lubricating
46–03
Power Steering Reservoir Fluid Level Checking
46–05
TRW Power Steering Gear Lubricating, TAS Series
72–01
Door Latch and Door Hinge Lubricating
88–01
Hood Hinge Bushing Lubricating
Check
Table 7, M1 Maintenance Operation 00-04, Lubrication and Fluid Level Check for Service Schedules I, II, and III
00/8
L-Line and A-Line Maintenance Manual, January 2007
00
General Information
Maintenance Operation Sets Table: 00–05
IMPORTANT: At each maintenance operation set, in
addition to the maintenance operations listed in this
table, perform all daily, weekly, and monthly maintenance operations listed in Chapter 11, "Pretrip and
Post-Trip Inspections and Maintenance" of the
L-Line and A-Line Driver’s Manual.
vides detailed instructions on the maintenance operations to be performed.
NOTE: Maintenance operations appearing in italics in
this table are for noise emission control components.
The "Maintenance Operation Number" is a reference
number matching the text in this manual which proMaintenance Operation Sets
Maintenance
Operation
Number
Maintenance Interval
Operation Description
IM M1 M2 M3 M4
01–01
Engine Rear-Support Assembly Checking
01–02
Engine Noise Panel Inspecting
01–03
Jacobs Engine Brake Wiring Inspecting
01–04
•
•
•
•
•
•
Engine Drive Belt Inspecting
•
•
09–01
Air Cleaner Element Inspecting and Replacing
•
•
13–01
Bendix Air Compressor Inspecting
•
•
15–01
Alternator, Battery, and Starter Checking
•
•
20–01
Radiator Cap Checking
•
•
20–02
Radiator Pressure Flushing and Coolant Changing
•
•
•
•
•
•
20–03
Fan Drive and Clutch Checking
25–01
Clutch Release Bearing Lubricating
26–01
Allison Transmission Fluid and Filter Changing
26–02
Manual Transmission Magnetic Plug Cleaning and Oil Changing
26–03
Transmission Air Filter/Regulator Checking, and Cleaning or Replacing
•
•
•
26–04
Transmission Breather and Oil Level Checking
•
•
•
•
31–01
Fifth Wheel Inspecting
•
•
•
•
31–02
Fifth Wheel Lubricating
•
•
•
•
31–03
Frame Fastener Torque Checking
31–04
Holland Fifth Wheel Sliding Mechanism Inspecting
•
•
•
31–05
Trailer Electrical Connector Lubricating
•
•
•
•
•
32–01
Suspension Inspecting
•
•
•
•
•
32–02
Suspension Lubricating
•
•
•
•
•
32–03
Suspension U-Bolt Torque Checking
•
•
•
33–01
Knuckle Pin Lubricating
33–02
Tie-Rod End Inspecting and Lubricating
33–03
All-Axle Alignment Checking
35–01
Axle Breather and Lubricant Level Checking
35–02
Axle Lubricant Changing, Oil Filter Replacing, and Magnetic Strainer Cleaning
L-Line and A-Line Maintenance Manual, January 2007
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
00/9
00
General Information
Maintenance Operation Sets Table: 00–05
Maintenance Operation Sets
Maintenance
Operation
Number
Maintenance Interval
Operation Description
IM M1 M2 M3 M4
40–01
Wheel Nut and Rim Nut Checking
•
•
•
41–01
Driveline Inspecting
•
•
•
•
•
41–02
Driveline Lubricating
•
42–01
Camshaft Bracket Bushing Lubricating
•
•
•
•
•
•
•
42–02
Automatic Slack Adjuster Lubricating and Checking
•
•
•
42–03
Bendix Air Dryer Checking (AD–IP or AD–9)
•
•
42–04
Bendix Air Dryer Desiccant Replacing (AD–9)
42–05
Bendix Air Brake Valve Operation Checking (BP–R1 and E–12)
•
•
42–06
Bendix Air Brake Valve Disassembly, Cleaning, and Inspecting (Double Check
Valve, E–12, MV–3, PP–7, QR–1, SR–1, ST–3, TC–6, TP–5, TR–3)
•
•
42–07
Bendix Air Brake Valve Disassembly, Cleaning, Inspecting, and Lubricating (DV–2
and Single Check Valve)
•
•
42–08
Bendix Air Brake Valve Inspecting and Testing (MV–3 and TC–6)
•
•
42–09
Bendix Foot Brake Valve Actuator Lubricating and Leak-Testing (E–12)
•
•
42–10
Brake Inspection
46–01
Steering Driveline Lubricating
46–02
Drag Link and Power Steering Cylinder Lubricating
•
•
•
•
46–03
Power Steering Reservoir Fluid Level Checking
•
•
•
•
46–04
Power Steering Reservoir Fluid and Filter Changing
•
•
•
46–05
TRW Power Steering Gear Lubricating, TAS Series
•
•
•
•
47–01
Fuel Tank Vent Checking
•
•
•
47–02
Fuel Tank Band Nut Tightening
•
•
•
•
47–03
Fuel Separator Sight Bowl Cleaning and Element Replacing
•
•
•
49–01
Exhaust System Inspecting
•
•
•
•
•
54–01
Electrical System Checking
•
•
•
72–01
Door Latch and Door Hinge Lubricating
•
•
•
•
83–01
Air Conditioner Inspecting
•
•
•
83–02
Air Filter Replacing*
88–01
Hood Hinge Bushings Lubricating
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
* Replace the HVAC filter every 6 months regardless of mileage.
Table 8, Maintenance Operation Sets
00/10
L-Line and A-Line Maintenance Manual, January 2007
00
General Information
Initial Maintenance (IM) Operations: 00–06
IMPORTANT: After performing all operations listed in
this table, perform all daily, weekly, and monthly
maintenance operations listed in Chapter 11, "Pretrip and Post-Trip Inspections and Maintenance"
of the L-Line and A-Line Driver’s Manual.
The "Maintenance Operation Number" is a reference
number matching the text in this manual which provides detailed instructions on the maintenance operations to be performed.
Initial Maintenance (IM) Operations for Service Schedules I, II, and III
Maintenance
Operation Number
Operation Description
15–01
Alternator, Battery, and Starter Checking
26–02
Manual Transmission Magnetic Plug Cleaning and Oil Changing
31–03
Frame Fastener Torque Checking
32–01
Suspension Inspecting
32–02
Suspension Lubricating
32–03
Suspension U-Bolt Torque Checking
33–03
All-Axle Alignment Checking
35–02
Axle Lubricant Changing, Oil Filter Replacing, and Magnetic Strainer Cleaning
41–01
Driveline Inspecting
41–02
Driveline Lubricating
47–02
Fuel Tank Band Nut Tightening
54–01
Electrical System Checking
Check
Table 9, Initial Maintenance (IM) Operations for Service Schedules I, II, and III
L-Line and A-Line Maintenance Manual, January 2007
00/11
00
General Information
M1 Maintenance Interval Operations Table: 00–07
The "M1 Maintenance Interval Operations" table lists
all maintenance operations that are to be performed
at the M1 maintenance interval. The "Maintenance
Operation Number" is a reference number matching
the text in this manual that provides detailed instructions on the maintenance operations to be performed.
IMPORTANT: After performing all operations listed in
this table, perform all daily, weekly, and monthly
maintenance operations listed in Chapter 11, "Pretrip and Post-Trip Inspections and Maintenance"
of the L-Line and A-Line Driver’s Manual.
M1 Maintenance Interval Operations for Service Schedules I, II, and III
Maintenance
Operation Number
00–04
Operation Description
Check
Lubrication and Fluid Level Check (includes the following):
• Clutch Release Bearing Lubricating
• Transmission Breather and Oil Level Checking
• Fifth Wheel Lubricating
• Trailer Electrical Connector Lubricating
• Suspension Lubricating (Front and Rear)
• Knuckle Pin Lubricating
• Tie-Rod End Inspecting and Lubricating
• Axle Breather and Lubricant Level Checking
• Driveline Lubricating
• Automatic Slack Adjuster Lubricating and Checking
• Steering Driveline Lubricating
• Drag Link and Power Steering Cylinder Lubricating
• Power Steering Reservoir Fluid Level Checking
• TRW Power Steering Gear Lubricating, TAS Series
• Door Latch and Door Hinge Lubricating
• Hood Hinge Bushings Lubricating
13–01
Bendix Air Compressor Inspecting
31–01
Fifth Wheel Inspecting
32–01
Suspension Inspecting
41–01
Driveline Inspecting
42–10
Brake Inspecting
47–02
Fuel Tank Band Nut Tightening
49–01
Exhaust System Inspecting
Table 10, M1 Maintenance Interval Operations for Service Schedules I, II, and III
00/12
L-Line and A-Line Maintenance Manual, January 2007
00
General Information
M2 Maintenance Interval Operations Table: 00–08
The "M2 Maintenance Interval Operations" table lists
all maintenance operations that are to be performed
at the M2 maintenance interval. The "Maintenance
Operation Number" is a reference number matching
the text in this manual which provides detailed instructions on the maintenance operations to be per-
formed. All M1 maintenance interval operations must
be completed before performing M2 maintenance
interval operations.
NOTE: Maintenance operations appearing in italics in
this table are for noise emission control components.
M2 Maintenance Interval Operations for Service Schedules I, II, and III
Maintenance
Operation Number
Operation Description
00–07
Perform all M1 Operations
01–03
Jacobs Engine Brake Wiring Inspecting
20–01
Radiator Cap Checking
20–03
Fan Drive and Clutch Checking
26–02
Manual Transmission Magnetic Plug Cleaning and Oil Changing
26–03
Transmission Air Filter/Regulator Checking, and Cleaning or Replacing
31–04
Holland Fifth Wheel Sliding Mechanism Inspecting
40–01
Wheel Nut and Rim Nut Checking
42–01
Camshaft Bracket Bushing Lubricating
42–07
Bendix Air Brake Valve Disassembly, Cleaning, Inspecting, and Lubricating (DV–2 and
Single Check Valve)
46–04
Power Steering Reservoir Fluid and Filter Changing
47–01
Fuel Tank Vent Checking
47–03
Fuel Separator Sight Bowl Cleaning and Element Replacing
83–01
Air Conditioner Inspecting
83–02
Air Filter Replacing*
Check
* Replace the HVAC filter every 6 months regardless of mileage.
Table 11, M2 Maintenance Interval Operations for Service Schedules I, II, and III
L-Line and A-Line Maintenance Manual, January 2007
00/13
00
General Information
M3 Maintenance Interval Operations Table: 00–09
The "M3 Maintenance Interval Operations" table lists
all maintenance operations that are to be performed
at the M3 maintenance interval. The "Maintenance
Operation Number" is a reference number matching
the text in this manual which provides detailed instructions on the maintenance operations to be performed. All maintenance interval operations in M1
and M2 must be completed before performing M3
maintenance interval operations.
IMPORTANT: After performing all operations listed in
this table, perform all daily, weekly, and monthly
maintenance operations listed in Chapter 11, "Pretrip and Post-Trip Inspections and Maintenance"
of the L-Line and A-Line Driver’s Manual.
NOTE: Maintenance operations appearing in italics in
this table are for noise emission control components.
M3 Maintenance Interval Operations for Service Schedules I, II, and III
Maintenance
Operation Number
Operation Description
Check
00–08
Perform all M1 Operations
00–09
Perform all M2 Operations
01–01
Engine Rear-Support Assembly Checking
01–02
Engine Noise Panel Inspecting
01–04
Engine Drive Belt Inspecting
09–01
Air Cleaner Element Inspecting and Replacing
15–01
Alternator, Battery, and Starter Checking
32–03
Suspension U-Bolt Torque Checking
35–02
Axle Lubricant Changing, Oil Filter Replacing, and Magnetic Strainer Cleaning
42–03
Bendix Air Dryer Checking (AD–IP or AD–9)
42–05
Bendix Air Brake Valve Operation Checking (BP–R1 and E–12)
42–06
Bendix Air Brake Valve Disassembly, Cleaning, and Inspecting (Double Check Valve,
E–12, MV–3, PP–7, QR–1, SR–1, ST–3, TC–6, TP–5, and TR–3)
42–08
Bendix Air Brake Valve Inspecting and Testing (MV–3 and TC–6)
42–09
Bendix Foot Brake Valve Actuator Lubricating and Leak-Testing (E–12)
47–03
Fuel Separator Sight Bowl Cleaning and Element Replacing
54–01
Electrical System Checking
Table 12, M3 Maintenance Interval Operations for Service Schedules I, II, and III
00/14
L-Line and A-Line Maintenance Manual, January 2007
00
General Information
M4 Maintenance Interval Operations Table: 00–10
The "M4 Maintenance Interval Operations" table lists
all maintenance operations that are to be performed
at the M4 maintenance interval. The "Maintenance
Operation Number" is a reference number matching
the text in this manual which provides detailed instructions on the maintenance operations to be performed. All maintenance interval operations in M1,
M2 and M3 must be completed before performing M4
maintenance interval operations.
IMPORTANT: After performing all operations listed in
this table, perform all daily, weekly, and monthly
maintenance operations listed in Chapter 11, "Pretrip and Post-Trip Inspections and Maintenance"
of the L-Line and A-Line Driver’s Manual.
M4 Maintenance Interval Operations for Service Schedules I, II, and III
Maintenance
Operation Number
Operation Description
00–07
Perform all M1 Operations
00–08
Perform all M2 Operations
00–09
Perform all M3 Operations
20–02
Radiator Pressure Flushing and Coolant Changing
26–01
Allison Transmission and Fluid Filter Changing
42–04
Check
Bendix Air Dryer Desiccant Replacing (AD–9)
Table 13, M4 Maintenance Interval Operations for Service Schedules I, II, and III
L-Line and A-Line Maintenance Manual, January 2007
00/15
00
General Information
Noise Emission Controls Maintenance: 00–11
General Information
Federal Law, Part 205:
Transportation Equipment Noise
Emission Controls
Part 205, Transportation Equipment Noise Emission
Controls, requires the vehicle manufacturer to furnish, with each new vehicle, such written instructions
for the proper maintenance, use, and repair of the
vehicle by the ultimate purchaser to provide reasonable assurance of the elimination or minimization of
noise-emission-control degradation throughout the
life of the vehicle. In compliance with the law, the
noise emission controls maintenance information in
each applicable group of this manual, in conjunction
with the vehicle service manual, provides these instructions to owners.
Recommendations for
Replacement Parts
Replacement parts used for maintenance or repair of
noise emission controls should be genuine Sterling
parts. If using other than genuine Sterling parts, the
owner should be sure that such parts are warranted
by their manufacturer to be equivalent to genuine
Sterling parts in performance and durability.
Sterling Noise Emission Controls
Warranty
2. The use of the vehicle after such device or element of design has been removed or rendered
inoperative by any person.
Among those acts presumed to constitute tampering are the acts listed below:
A. Removal of engine noise-deadening panels.
B. Removal of cab-tunnel or hood noisedeadening panels.
C. Removal of, or rendering inoperative, the engine speed governor so as to allow engine
speed to exceed manufacturer’s specifications.
D. Removal of, or rendering inoperative, the fan
clutch, including bypassing the control on
any thermostatic fan drive to cause it to operate continuously.
E. Removal of the fan shroud.
F.
Removal of, or rendering inoperative, exhaust components, including exhaust pipe
clamping.
G. Removal of air intake components.
Maintenance Instructions
Scheduled intervals are in the maintenance tables in
this group. "Verification of Inspections Log" (Groups
01 and 20, and Group 49) follows, and should be
filled in each time noise emission controls on the vehicle are maintained or repaired.
Refer to the vehicle owner’s warranty information
book for warranty information concerning noise emission controls.
Tampering With Noise Controls is
Prohibited
Federal law prohibits the following acts or the causing thereof:
1. The removal or rendering inoperative by any person (other than for purposes of maintenance,
repair, or replacement) of any device or element
of design incorporated into any new vehicle for
the purpose of noise control, prior to its sale or
delivery to the ultimate purchaser, or while it is in
use.
00/16
L-Line and A-Line Maintenance Manual, January 2007
00
General Information
Verification of Inspections Log: 00–12
Verification of Inspections Log
Verification of Inspections Log, Groups 01 and 20
Date
Mileage
Item
Cost
Maintenance Facility
Group 01 — Engine Rear Supports and Engine Noise Panels
Group 20 — Fan Drive
Table 14, Verification of Inspections Log, Groups 01 and 20
L-Line and A-Line Maintenance Manual, January 2007
00/17
00
General Information
Verification of Inspections Log: 00–12
Verification of Inspections Log, Group 49
Date
Mileage
Item
Cost
Maintenance Facility
Group 49 — Exhaust System Components
Table 15, Verification of Inspections Log, Group 49
00/18
L-Line and A-Line Maintenance Manual, January 2007
00
General Information
Metric/U.S. Customary Conversion Tables: 00–13
When You Know U.S.
Customary
Multiply
By
To Get Metric
When You
Know Metric
Multiply
By
To Get U.S. Customary
Length
inches (in)
25.4
millimeters (mm)
0.03937
inches (in)
inches (in)
2.54
centimeters (cm)
0.3937
inches (in)
feet (ft)
0.3048
meters (m)
3.281
feet (ft)
yards (yd)
0.9144
meters (m)
1.094
yards (yd)
miles (mi)
1.609
kilometers (km)
0.6215
miles (mi)
square inches (in2)
645.16
square millimeters (mm2)
0.00155
square inches (in2)
square inches (in2)
6.452
square centimeters (cm2)
0.155
square inches (in2)
square feet (ft2)
0.0929
square meters (m2)
10.764
cubic inches (in3)
16387.0
cubic millimeter (mm3)
0.000061
cubic inches (in3)
cubic inches (in3)
16.387
cubic centimeters (cm3)
0.06102
cubic inches (in3)
cubic inches (in3)
0.01639
liters (L)
61.024
cubic inches (in3)
fluid ounces (fl oz)
29.54
milliliters (mL)
0.03381
pints (pt)
0.47318
liters (L)
2.1134
pints (pt)
quarts (qt)
0.94635
liters (L)
1.0567
quarts (qt)
Area
square feet (ft2)
Volume
fluid ounces (fl oz)
gallons (gal)
3.7854
liters (L)
0.2642
cubic feet (ft3)
28.317
liters (L)
0.03531
cubic feet (ft3)
gallons (gal)
cubic feet (ft3)
0.02832
cubic meters (m3)
35.315
cubic feet (ft3)
Weight/Force
ounces (av) (oz)
28.35
grams (g)
0.03527
ounces (av) (oz)
pounds (av) (lb)
0.454
kilograms (kg)
2.205
pounds (av) (lb)
U.S. tons (t)
907.18
kilograms (kg)
0.001102
U.S. tons (t)
U.S. tons (t)
0.90718
metric tons (t)
1.1023
U.S. tons (t)
Torque/Work Force
inch–pounds (lbf·in)
11.298
Newton–centimeters (N·cm)
0.08851
inch–pounds (lbf·in)
foot–pounds (lbf·ft)
1.3558
Newton–meters (N·m)
0.7376
foot–pounds (lbf·ft)
3.37685
kilo Pascals (kPa)
0.29613
inches of mercury (inHg)
kilo Pascals (kPa)
0.14503
pounds per square inch (psi)
Pressure/Vacuum
inches of mercury (inHg)
pounds per square inch (psi) 6.895
Table 16, Metric/U.S. Customary Conversion Table
L-Line and A-Line Maintenance Manual, January 2007
00/19
00
General Information
Metric/U.S. Customary Conversion Tables: 00–13
Temperature Conversion
When You Know
Subtract
Then
Divide By
degrees Fahrenheit (°F)
32
1.8
To Get
When You
Know
degrees Celsius (°C)
Multiply
By
Then
Add
To Get
1.8
32
degrees Fahrenheit (°F)
Table 17, Temperature Conversion
00/20
L-Line and A-Line Maintenance Manual, January 2007
00
General Information
Torque Specifications Tables: 00–14
Torque Values for U.S. Customary Thread Fasteners With Lubricated* or Plated Threads†
Regular Hex
Thread
Diameter–
Pitch
Grade 5
Bolt
Grade 5 or
B Nut
Torque: lbf·ft (N·m)
f230003
f230002
Flanged
Grade 8 or
8.2 Bolt
Grade 8 or
C Nut
Torque: lbf·ft (N·m)
f230004
f230005
Grade 5
Bolt
Grade B
Nut
Torque: lbf·ft (N·m)
f230006
f230007
Grade 8 or
8.2 Bolt
Grade G
Nut
Torque: lbf·ft (N·m)
f230009
f230008
1/4–20
7 (9)
8 (11)
6 (8)
10 (14)
1/4–28
8 (11)
9 (12)
7 (9)
12 (16)
5/16–18
15 (20)
16 (22)
13 (18)
21 (28)
5/16–24
16 (22)
17 (23)
14 (19)
23 (31)
3/8–16
26 (35)
28 (38)
23 (31)
37 (50)
3/8–24
30 (41)
32 (43)
25 (34)
42 (57)
7/16–14
42 (57)
45 (61)
35 (47)
60 (81)
7/16–20
47 (64)
50 (68)
40 (54)
66 (89)
1/2–13
64 (87)
68 (92)
55 (75)
91 (123)
1/2–20
72 (98)
77 (104)
65 (88)
102 (138)
9/16–12
92 (125)
98 (133)
80 (108)
130 (176)
9/16–18
103 (140)
110 (149)
90 (122)
146 (198)
5/8–11
128 (173)
136 (184)
110 (149)
180 (244)
5/8–18
145 (197)
154 (209)
130 (176)
204 (277)
3/4–10
226 (306)
241 (327)
200 (271)
320 (434)
3/4–16
253 (343)
269 (365)
220 (298)
357 (484)
7/8–9
365 (495)
388 (526)
320 (434)
515 (698)
7/8–14
402 (545)
427 (579)
350 (475)
568 (770)
1–8
—
582 (789)
—
—
1–12
—
637 (863)
—
—
1–14
—
652 (884)
—
—
* Sterling recommends that all plated and unplated fasteners be coated with oil before installation.
† Use these torque values if either the bolt or nut is lubricated or plated (zinc-phosphate conversion-coated, cadmium-plated, or waxed).
Table 18, Torque Values for U.S. Customary Thread Fasteners With Lubricated or Plated Threads
L-Line and A-Line Maintenance Manual, January 2007
00/21
00
General Information
Torque Specifications Tables: 00–14
Torque Values for U.S. Customary Thread Fasteners With Dry (Unlubricated)* Plain (Unplated) Threads†
Regular Hex
Thread
Diameter–Pitch
Grade 5 Bolt
Grade 5 or B
Nut
Torque: lbf·ft (N·m)
Grade 8 or C
Nut
Torque: lbf·ft (N·m)
f230003
f230002
Flanged
Grade 8 or 8.2
Bolt
f230004
Grade 8 or 8.2
Bolt
Grade G Nut
Torque: lbf·ft (N·m)
f230005
f230009
f230008
1/4–20
8 (11)
10 (14)
—
1/4–28
9 (12)
12 (16)
—
5/16–18
15 (20)
22 (30)
22 (30)
5/16–24
17 (23)
25 (34)
—
3/8–16
28 (38)
40 (54)
40 (54)
3/8–24
31 (42)
45 (61)
—
7/16–14
45 (61)
65 (88)
65 (88)
7/16–20
50 (68)
70 (95)
—
1/2–13
70 (95)
95 (129)
95 (129)
1/2–20
75 (102)
110 (149)
—
9/16–12
100 (136)
140 (190)
140 (190)
9/16–18
110 (149)
155 (210)
—
5/8–11
135 (183)
190 (258)
190 (258)
5/8–18
155 (210)
215 (292)
—
3/4–10
240 (325)
340 (461)
340 (461)
3/4–16
270 (366)
380 (515)
—
7/8–9
385 (522)
540 (732)
—
7/8–14
425 (576)
600 (813)
—
1–8
580 (786)
820 (1112)
—
1–12
635 (861)
900 (1220)
—
1–14
650 (881)
915 (1241)
—
* Threads may have residual oil, but will be dry to the touch.
† Male and female threads (bolt and nut) must both be unlubricated and unplated; if either is plated or lubricated, use Table 18. Sterling recommends that all
plated and unplated fasteners be coated with oil before installation.
Table 19, Torque Values for U.S. Customary Thread Fasteners With Dry (Unlubricated) Plain (Unplated) Threads
00/22
L-Line and A-Line Maintenance Manual, January 2007
00
General Information
Torque Specifications Tables: 00–14
Torque Values for Metric Thread Fasteners With Lubricated* or Plated Threads†
Class 8.8 Bolt
Class 8 Nut
Thread
Diameter–Pitch
Torque: lbf·ft (N·m)
8.8
Class 10 Nut
Torque: lbf·ft (N·m)
10.9
8
f230010
Class 10.9 Bolt
f230011
10
f230012
f230013
M6
5 (7)
7 (9)
M8
12 (16)
17 (23)
M8 x 1
13 (18)
18 (24)
M10
24 (33)
34 (46)
M10 x 1.25
27 (37)
38 (52)
M12
42 (57)
60 (81)
M12 x 1.5
43 (58)
62 (84)
M14
66 (89)
95 (129)
M14 x 1.5
72 (98)
103 (140)
M16
103 (140)
148 (201)
M16 x 1.5
110 (149)
157 (213)
M18
147 (199)
203 (275)
M18 x 1.5
165 (224)
229 (310)
M20
208 (282)
288 (390)
M20 x 1.5
213 (313)
320 (434)
M22
283 (384)
392 (531)
M22 x 1.5
315 (427)
431 (584)
M24
360 (488)
498 (675)
M24 x 2
392 (531)
542 (735)
M27
527 (715)
729 (988)
M27 x 2
569 (771)
788 (1068)
M30
715 (969)
990 (1342)
M30 x 2
792 (1074)
1096 (1486)
* Sterling recommends that all plated and unplated fasteners be coated with oil before installation.
† Use these torque values if either the bolt or nut is lubricated or plated (zinc-phosphate conversion-coated,
cadmium-plated, or waxed).
Table 20, Torque Values for Metric Thread Fasteners With Lubricated or Plated
Threads
L-Line and A-Line Maintenance Manual, January 2007
00/23
Engine
01
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Engine Drive Belt Inspecting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–04
Engine Noise Panel Inspecting (Noise Emission Control). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–02
Engine Rear-Support Assembly Checking (Noise Emission Control). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–01
Jacobs Engine Brake Wiring Inspecting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–03
L-Line and A-Line Maintenance Manual, January 2007
01
Engine
01–01 Engine Rear-Support
Assembly Checking
(Noise Emission
Control)
2
1
3
4
5
15
Front and rear engine supports for vehicles built from
January 2007 require no periodic maintenance.
Mounts should be inspected when the engine is removed for service. For vehicles manufactured prior to
January 2007, perform the following check.
7
10
14
13
Visually inspect the rubber insulators (see Fig. 1) for
cracks, cuts, and other damage; replace if damaged.
Also, at engine overhaul or whenever the engine has
been removed, replace the insulators. See Group 01
of the L-Line and A-Line Workshop Manual for insulator replacement procedures.
9
10
12
11
Check the engine rear-support fasteners for tightness. See Fig. 1.
See Table 1 for torque specifications.
01–02 Engine Noise Panel
Inspecting (Noise
Emission Control)
If so equipped, inspect for torn engine noise panels.
See Fig. 2 for a Caterpillar engine, or see Fig. 3 for
a Cummins engine. If panels are torn, replace them
with new panels; see Group 01 of the L-Line and
A-Line Workshop Manual for procedures. Cummins
M11 and N14 engines, and Detroit Diesel Series engines do not have engine noise panels.
6
6
6
8
10/26/98
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
8
f011285
Flywheel Housing
Flatwasher
Hexbolt (M12 x 1.75 x 55)
Engine Rear Support Bracket (left-hand)
Hexbolt (5/8–11 x 3.50)
Flatwasher
Engine Support Bracket (left-hand)
Locknut (5/8–11)
Engine Support-to-Frame Cap
Flatwasher
Locknut (1/2–13)
Engine Rear Support Bracket (right-hand)
Engine Support Bracket (right-hand)
Engine Support Rubber Insulator
Hexbolt (1/2–13 x 2.50)
Fig. 1, Engine Rear Support Assembly
Rear Engine-Support Fastener Torque Specifications
Size
Grade
Torque*: lbf·ft (N·m)
Engine-Support-Insulator Nut
5/8–11
C
160 (216)
Frame-Mounted Engine-Support-Bracket Nut
5/8–11
C
190 (258)
Fastener Description
Transmission-Mounted Engine-Support-Bracket Capscrew
3/4–10
8
340 (461)
Overslung Crossmember Nut
1/2–13
C
95 (129)
* Torque values are for dry, unplated fasteners.
Table 1, Rear Engine-Support Fastener Torque Specifications
L-Line and A-Line Maintenance Manual, January 2007
01/1
01
Engine
3
3
1
1
2
2
05/27/93
f010647a
NOTE: Caterpillar 3406E engines do not have right-side
noise panels.
1. Right-Side Noise Panel
2. Oil Pan Noise Panel
3. Left-Side Noise Panel
4
4
Fig. 2, Caterpillar Engine Noise Panels
01–03 Jacobs Engine Brake
Wiring Inspecting
Inspect the wiring from the dash switches to the engine brake housings for breaks and for broken or
chafed insulation. Make sure that all terminal connections are in good condition and are fastened. Inspect
the wiring to the clutch and throttle switches.
NOTE: Some engine brake installations do not
use clutch or throttle switches.
01–04 Engine Drive Belt
Inspecting
Worn or loose drive belts may cause premature
bearing failure or engine overheating. Excessive tension, or too little tension on the belt may result in excessive and premature belt wear. Poly-V belts, or
serpentine belts are retained by a belt tensioner that
requires no tension adjustment. Replace the engine
drive belt if any conditions described in the visual
description are found. V-belts are installed as individual belts, and as matched sets. When replacing a
matched set of belts, always replace both belts at the
01/2
f010646a
01/16/96
1.
2.
3.
4.
NTC Right-Side Noise Panels
NTC Oil Pan Noise Panel
NTC Left-Side Noise Panel
L10 Front Gear Cover Noise Panel
Fig. 3, Cummins Engine Noise Panels
same time. Matched belts must be from the same
manufacturer. To inspect a belt, gently twist the belt
to view the belt sidewalls and bottom. Visually inspect all drive belts for the following conditions, then
perform the belt tension inspection:
Visual Inspection
1. Inspect the belt for glazing. See Fig. 4, Ref. A.
Glazing is represented by shiny sidewalls, and is
caused by friction created when a loose belt slips
L-Line and A-Line Maintenance Manual, January 2007
01
Engine
in the pulleys. It can also be caused by oil or
grease contamination on the pulleys.
2. Check the belt for ply separation. See Fig. 4,
Ref. B. Oil, grease, or belt dressing can cause
the belt to fall apart in layers. Repair any oil or
coolant leaks that are affecting the belts before
replacing the drive belts. Do not use belt dressing on any belt.
3. Check the belt for a jagged or streaked sidewall.
See Fig. 4, Ref. C. Jagged or streaked sidewalls
are the result of foreign objects, such as sand or
gravel in the pulley, or a rough pulley surface.
4. Check for tensile breaks; breaks in the cord
body. See Fig. 4, Ref. D. Cuts in a belt are usually caused by foreign objects in the pulley, or by
prying or forcing the belt during removal or installation.
6. Check the drive belts for cracks. See Fig. 4, Ref.
F. Small irregular cracks are usually the signs of
an old belt.
7. Visually inspect the pulleys for excessive play or
wobble. Excessive play or wobble indicates a
failure of the pulley bearing. Check for belt
squealing or squeaking. Replace the bearings as
necessary.
NOTE: If it is difficult to distinguish the location
of a supposed bearing noise, place a stethoscope on the component being checked, not the
pulley, to isolate the area from outside interference.
8. Inspect all pulleys for foreign objects, oil, or
grease in the grooves.
5. Check for uneven ribs on serpentine (poly-V)
belts. See Fig. 4, Ref. E. Foreign objects in the
pulley will erode the undercord ribs, causing the
belt to lose its gripping power.
A
D
B
E
C
F
11/21/94
A. Glazing
B. Separating Layers
C. Streaked Sidewalls
f150010a
D. Tensile Break
E. Uneven Ribs
F. Cracks
Fig. 4, Drive Belt Replacement Conditions
L-Line and A-Line Maintenance Manual, January 2007
01/3
01
Engine
Belt Tension Inspection
Spring-Tension Type
NOTE: If engine drive belts require adjustment,
see Group 01 of the L-Line and A-Line Workshop Manual.
On belts equipped with a spring tensioner, the belt
tension is automatically adjusted. Check that the tensioner is holding tension on the belt by inserting the
end of a breaker bar in the 1/2-inch square hole on
the forward face of the tensioner, and rotating the
tensioner down, away from the belt. When the
breaker bar is slowly released, the tensioner should
return to its original position. If not, see Group 01 of
the L-Line and A-Line Workshop Manual for replacement instructions.
Threaded-Adjustment Type
1. Apply the parking brakes, and chock the tires to
prevent the vehicle from moving.
2. Install a belt tension gauge at the center of the
belt’s longest free-span. Check belt tension. See
Table 2 for belt tension specifications.
3. If belt tension is not correct, see Group 01 of the
L-Line and A-Line Workshop Manual to adjust
belt tension.
Drive Belt Tension
Engine
Component
Belt Tension: lbf (kg)
Caterpillar C10 (3176)
Refrigerant Compressor
80–100 (36–45)
Alternator and Refrigerant Compressor
40–50 (18–23), per belt
Fan
80–100 (36–45)
Caterpillar 3406E
Cummins M11
Cummins N14
Detroit Diesel Series 60
Alternator
90–120 (41–55)
Fan
155–165 (70–75)
Refrigerant Compressor
80–100 (36–45)
Alternator
40–50 (18–23), per belt
Fan
80–120 (36–55)
Refrigerant Compressor
80–100 (36–45)
Alternator and Refrigerant Compressor
80–100 (36–45), power band
Fan
60–80 (27–36)
Table 2, Drive Belt Tension
01/4
L-Line and A-Line Maintenance Manual, January 2007
Air Intake
09
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Air Cleaner Element Inspecting and Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 09–01
L-Line and A-Line Maintenance Manual, February 2004
Air Intake
09
09–01 Air Cleaner Element
Inspecting and
Replacing
Method 1
Replace the air cleaner element at the recommended
interval or when the air restriction indicator reaches
20 inH2O on a vehicle with a Detroit Diesel engine,
22 inH2O on a vehicle with an M-B engine, or 25
inH2O on a vehicle with a Caterpillar or Cummins
engine. For replacement instructions, see Group 09
of the L-Line and A-Line Workshop Manual. Reset
the air restriction indicator.
If the maximum restriction is not reached, record the
air restriction value. If the value is higher than the
previous recording, reset the air restriction indicator.
If the value is lower than the previous recording, inspect the air cleaner and air cleaner element for
cracks, leaks, or any other damage.
If the air cleaner or air cleaner element is damaged,
replace it and reset the air restriction indicator.
Method 2
Replace the air cleaner element at the recommended
interval or when the air restriction indicator reaches
20 inH2O on a vehicle with a Detroit Diesel engine,
22 inH2O on a vehicle with an M-B engine, or 25
inH2O on a vehicle with a Caterpillar or Cummins
engine. For replacement instructions, see Group 09
of the L-Line and A-Line Workshop Manual. Reset
the air restriction indicator.
If the maximum restriction is not reached, inspect the
air cleaner and air cleaner element for cracks, leaks,
or any other damage. If the air cleaner or air cleaner
element is damaged, replace it and reset the air restriction indicator.
L-Line and A-Line Maintenance Manual, February 2004
09/1
Air Compressor
13
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Bendix Air Compressor Inspecting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13–01
L-Line and A-Line Maintenance Manual, October 1999
Air Compressor
13
13–01 Bendix Air Compressor
Inspecting
Inspect the air intake line, oil supply and return lines,
and coolant supply and return hoses for tight connections and general condition. Tighten the connections
and replace the lines and hoses as needed. If the
compressor air-intake adapter is loose, remove the
adapter, replace the adapter gaskets, and securely
install the adapter.
Check the cooling fins on the compressor crankcase.
Clean the fins if they are clogged with dirt or grease.
L-Line and A-Line Maintenance Manual, October 1999
13/1
Alternators and Starters
15
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Alternator, Battery, and Starter Connections Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15–01
L-Line and A-Line Maintenance Manual, October 2008
15
Alternators and Starters
15–01 Alternator, Battery, and
Starter Connections
Check
weak solution of baking soda and water.
Rinse with clean water, and dry. Paint the
retainer assembly, if needed to prevent
rusting.
4.3
Be sure there are no foreign objects,
such as stones, bolts, and nuts, in the
battery box.
4.4
After cleaning, connect the cables to the
batteries, and tighten them to the torque
specifications listed on the battery, generally 10 to 15 lbf·ft (14 to 20 N·m).
4.5
Coat the battery terminals with dielectric
grease.
WARNING
Batteries generate explosive gas as a by-product
of their chemical process. Do not smoke when
working around batteries. Put out all flames and
remove any source of sparks or intense heat in
the vicinity of the battery compartment. Make sure
the battery compartment has been completely
vented before disconnecting or connecting the
battery cables.
Battery acid is extremely harmful if splashed in
the eyes or on the skin. Always wear a face shield
and protective clothing when working around
batteries.
1. Check the tightness of the alternator bracket fasteners; tighten the fasteners as needed. For
torque values, see Group 15 of the L-Line and
A-Line Workshop Manual.
5. Check the alternator wiring for missing insulation,
kinks, and heat damage. Replace or repair as
needed.
6. Check the terminals on the battery shut-off
switch and the magnetic switch. Make sure the
terminal connections are clean and tight. Coat
the terminal connections with dielectric red
enamel after cleaning.
2. Check the belt tension of the alternator drive
belt. Use a tension gauge at the belt’s widest
span, and adjust the belt tension if needed. See
Group 01 for belt tension specifications. Some
engines are equipped with dual alternator belts;
always check both belts for correct tension. Engines equipped with a serpentine or poly-V belt
have automatic belt tensioners, and do not require belt tension inspection.
3. Clean and tighten all charging system electrical
connections, including the connections at the
starter B terminal and ground terminal, and
where the alternator charging cable terminates.
4. Inspect the battery cables for wear, and replace
as needed. Clean the cable connector terminals
with a wire brush. See Group 54 of the L-Line
and A-Line Workshop Manual for troubleshooting
instructions, and for adjustment, repair, or replacement instructions.
4.1
Clean and tighten the battery ground
cable, terminal, and clamps.
4.2
Inspect the retainer assembly or battery
hold-downs and the battery box. Replace
worn or damaged parts. Remove any corrosion with a wire brush, and wash with a
L-Line and A-Line Maintenance Manual, October 2008
15/1
Engine Cooling/Radiator
20
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Fan Drive and Fan Clutch Checking (Noise Emission Control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20–03
Radiator Cap Checking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20–01
Radiator Pressure Flushing and Coolant Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20–02
L-Line and A-Line Maintenance Manual, January 2007
20
Engine Cooling/Radiator
20–01 Radiator Cap Checking
WARNING
Do not remove or loosen the radiator cap until the
engine and cooling system have completely
cooled. Use extreme care when removing the cap.
A sudden release of pressure from removing the
cap prior to the system cooling can result in a
surge of scalding coolant that could cause serious personal injury.
CAUTION
The radiator cap currently installed may not be the
same one installed when the vehicle was built. If
the radiator cap must be replaced, make sure that
it is the correct cap for the cooling system of the
vehicle. Because the radiator cap pressure rating
affects the operating temperature of the engine,
installing an improperly rated radiator cap may
have adverse effects on the cooling system, and
engine operating temperatures. This could cause
premature engine wear or damage.
1. Using a radiator-cap tester, check the pressure
cap to see if it maintains pressure to within 10
percent of the pressure rating marked on the
cap. If it doesn’t, replace the cap. Make sure that
the replacement radiator cap is correctly rated for
the cooling system of the vehicle.
cable engine manufacturer’s maintenance and
operation manual.
1. If necessary, remove the aerodynamic cover
from the front bumper.
2. Drain the radiator as follows:
For a low-flow cooling system, disconnect the
radiator bottom tank inlet and outlet hoses, and
tighten the radiator cap. Attach the flushing gun
nozzle to the outlet hose.
For a high-flow cooling system, disconnect the
radiator upper and lower hoses, and tighten the
radiator cap. Attach the flushing gun nozzle to
the lower hose.
3. Run the water until the radiator is full.
CAUTION
Excessive pressure can damage the radiator or
heater core.
4. Gradually apply air pressure to help dislodge
sediment built up in the radiator core. Do not
apply more than 15 psi (103 kPa) air pressure to
the radiator. Pressures exceeding 15 psi (103
kPa) could damage the radiator core.
5. Shut off the air at the pressure gun nozzle and
allow the radiator to refill with water.
6. Repeat the previous two steps until clean water
flows from the radiator.
2. There is a second valve in the radiator cap that
opens under vacuum. This prevents the collapse
of hoses and other parts that are not internally
supported when the system cools. Inspect the
vacuum-relief valve to be sure it is not stuck.
7. Remove the radiator side tank drain plug and
allow the radiator to drain. Install and tighten the
side tank drain plug and the radiator outlet pipe
drain plug after the radiator has been drained.
Do not overtighten the plugs.
3. Make sure that the cap seals properly on the
coolant filler neck seat, and that the radiator cap
gasket is not damaged. On vehicles with screw
on caps with O-rings, make sure that the O-ring
is not cracked or deteriorated. Replace the cap if
the gasket shows deterioration or damage.
8. Connect the hoses. Your hose clamps can be
either T-bolt clamps (see Fig. 1) or Breeze
Constant-Torque clamps (see Fig. 2).
20–02 Radiator Pressure
Flushing and Coolant
Changing
NOTE: For additional instructions on cleaning
and flushing the cooling system, see the appli-
L-Line and A-Line Maintenance Manual, January 2007
When working with T-bolt type hose clamps,
tighten the clamps 55 lbf·in (620 N·cm). These
clamps are now standard on hoses with an inside diameter greater than 2 inches (51 mm).
When installing Breeze Constant-Torque hose
clamps, the clamps must be tightened to the correct torque. The screw tip of the clamp must extend about 1/4 inch (6 mm) from the clamp housing, and the Belleville washer stacks must be
collapsed almost flat. Use a torque wrench to
install these hose clamps correctly. Correct in-
20/1
20
Engine Cooling/Radiator
stallation torque for Breeze Constant-Torque
hose clamps is as follows:
For clamps with a 5/16-inch tightening screw
hex: 55 lbf·in (620 N·cm).
For clamps with a 3/8-inch tightening screw hex:
90 lbf·in (1020 N·cm).
matically adjust and keep consistent sealing
pressure. During vehicle operation and shutdown, the screw tip may adjust according to
temperature and pressure changes. The torque
may need to be adjusted for individual applications.
IMPORTANT: On vehicles with EPA07 compliant
engines, the coolant capacity varies depending
on the engine and accessory installation. After
servicing the cooling system, always verify that
the coolant level is between the MIN and MAX
lines on the surge tank.
f200326
02/28/96
Fig. 1, T-Bolt Type Hose Clamp
A
08/15/94
B
1
f200286
A. The screw tip must extend about 1/4 inch (6 mm).
B. The Belleville washer stacks must be collapsed
almost flat.
1. Tightening Screw Hex
Fig. 2, Breeze Constant-Torque Hose Clamp Installation
NOTE: All hose clamps will lose torque after
installation due to "compression set." However,
when correctly installed, Breeze ConstantTorque clamps will hold enough torque to auto-
20/2
9. Fill the radiator with new coolant. See Group
20of the L-Line and A-Line Workshop Manual for
guidelines. See Table 1 for cooling system capacities for antifreeze protection information. Certain equipment such as fuel heaters, water filters,
and auxiliary heaters may increase the coolant
capacity and require additional coolant. The cooling system is filled when the coolant level
reaches the MAX line on the surge tank. Sterling
recommends the use of a precharged and premixed antifreeze when refilling the cooling system. See Table 2 for a list of some of the precharged antifreeze available. Use of an
equivalent antifreeze to those listed in the table
is also acceptable. Always check that the antifreeze used meets Sterling specifications and is
at the proper concentration for protection in the
vehicle operating area. See Table 3 for antifreeze protection information. Sterling specifies
that the antifreeze must be an ethylene glycol
solution that meets GM 6038 M Engineering
Standards or an ethylene glycol solution that has
less than 0.1 percent anhydrous sodium metasilicate, and meets either GM 1825 M or GM 1899
M Engineering Standards. If supplemental coolant additives are being used, add the supplements to the coolant as necessary. See the coolant additive manufacturer’s instructions for the
correct amount of additive required. Don’t forget
to consider the volume of the supplemental coolant additive being added to the system when determining the amount of coolant required to refill
the system.
L-Line and A-Line Maintenance Manual, January 2007
20
Engine Cooling/Radiator
Cooling System Capacity (pre-EPA07 engines)
Engine Make
Radiator Core and System Capacity*: quarts (liters)
Engine Model
Standard
1050 sq. inch
1300 sq. inch
All, Except 3306C/3406E
31.0 (29.4)
32.9 (31.2)
34.2 (32.4)
3306C
39.2 (37.2)
41.1 (39.0)
42.4 (40.2)
3406E
45.7 (43.3)
47.6 (45.1)
48.9 (46.3)
8.3L
32.3 (30.7)
34.2 (32.5)
35.5 (33.7)
M11
31.4 (28.8)
33.3 (30.6)
34.6 (31.8
N14
40.6 (38.6)
42.5 (40.4)
43.8 (41.6)
Series 60
47.3 (44.9)
49.1 (46.7)
50.5 (47.9)
Caterpillar
Cummins
Detroit Diesel
* System capacity includes all hoses, fittings, and the heater core. Add 1.8 quarts (1.7 liters) for sleeper units.
Table 1, Cooling System Capacity (pre-EPA07 engines)
Approved Antifreeze
Manufacturer
Antifreeze
Type
Caterpillar
Caterpillar Diesel Engine Antifreeze/Coolant
Contains supplement additives. Available as a
premixed solution.
Cummins
Fleetguard® Compleat Premix
Premixed solution with supplement additives
Detroit Diesel
Detroit Diesel Power Cool
Premixed solution with supplement additives
Old World Industries
Fleet
Charge™
With supplement additives
Table 2, Approved Antifreeze
Maximum Coolant Protection in °F (°C) at Various Antifreeze Concentrations
Cooling
System
Capacity:
gal (L)*
ETHYLENE-GLYCOL BASE ANTIFREEZE REQUIRED gallons (liters)
2 (8)
3 (11)
4 (15)
5 (19)
6 (23)
10 (38)
16
(–9)
4
(–16)
–12
(–24)
–34
(–37)
–62
(–52)†
11 (42)
18
(–8)
8
(–13)
–6
(–21)
–23
(–31)
–47
(–44)
–62
(–52)†
12 (45)
19
(–7)
10
(–12)
0
(–18)
–15
(–26)
–34
(–37)
–57
(–49)
13 (49)
21
(–6)
13
(–11)
3
(–16)
–9
(–23)
–25
(–31)
–45
(–43)
–62
(–52)†
14 (53)
15
(–9)
6
(–14)
–5
(–19)
–18
(–28)
–34
(–37)
–54
(–48)
15 (57)
16
(–9)
8
(–13)
0
(–18)
–12
(–24)
–26
(–32)
–43
(–42)
–62
(–52)†
16 (61)
17
(–8)
10
(–12)
2
(–17)
–8
(–22)
–19
(–28)
–34
(–37)
–52
(–47)
L-Line and A-Line Maintenance Manual, January 2007
7 (26)
8 (30)
9 (34)
10 (38)
11 (42)
12 (45)
–62
(–52)†
20/3
20
Engine Cooling/Radiator
Maximum Coolant Protection in °F (°C) at Various Antifreeze Concentrations
Cooling
System
Capacity:
gal (L)*
ETHYLENE-GLYCOL BASE ANTIFREEZE REQUIRED gallons (liters)
3 (11)
4 (15)
5 (19)
6 (23)
7 (26)
8 (30)
9 (34)
10 (38)
17 (64)
18
(–8)
12
(–11)
5
(–15)
–4
(–20)
–14
(–26)
–27
(–33)
–42
(–41)
–58
(–50)
18 (68)
19
(–7)
14
(–10)
7
(–14)
0
(–18)
–10
(–23)
–21
(–29)
–34
(–37)
–50
(–46)
–62
(–52)†
19 (72)
20
(–7)
15
(–9)
9
(–13)
2
(–17)
–7
(–22)
–16
(–27)
–28
(–33)
–42
(–41)
–56
(–49)
16
(–9)
10
(–12)
4
(–16)
–3
(–19)
–12
(–24)
–22
(–30)
–34
(–37)
–48
(–44)
20 (76)
2 (8)
11 (42)
12 (45)
–62
(–52)†
* For cooling system capacities not shown, the required amount of antifreeze can be calculated using the following: ethylene-glycol base antifreeze in a 25%
solution protects to 10°F (–12°C), 33% to 0°F (–18°C), 40% to –12°F (–24°C), 50% to –34°F (–37°C), and 60% to –62°F (–52°C).
† 60% ethylene-glycol base antifreeze and 40% water by volume gives maximum coolant protection (–62°F [–52°C]). Exceeding 60% antifreeze diminishes
coolant protection; concentrated ethylene-glycol base antifreeze will freeze at approximately 0°F (–18°C).
Table 3, Maximum Coolant Protection in Degrees F (Degrees C) at Various Antifreeze Concentrations
20–03 Fan Drive and Fan
Clutch Checking (Noise
Emission Control)
Eaton Viscous Fan Drive
Periodic maintenance is not required because an
Eaton viscous fan drive is a sealed unit. However,
periodically check it for damage and for correct operation. If the fan drive is inoperative or damaged,
replace it with a new one. See Group 20 of the
L-Line and A-Line Workshop Manual for instructions.
Horton Advantage® and HT 550
Fan Clutch
NOTE: If any part of the fan clutch needs to be
fixed or replaced, after performing the checks
below, see Group 20 of the L-Line and A-Line
Workshop Manual.
1. Inspect all electrical connections and wires.
Tighten the connections if loose, and replace
wires and connections if damaged.
2. Charge the air system to 120 psi (627 kPa), then
proceed as follows:
WARNING
Do not jumper the thermal switch while the engine
is running. This could start the cooling fan, which
could result in serious personal injury.
If the vehicle is equipped with Detroit Diesel Optimized Idling®, make sure this feature is not activated. If Optimized Idling were activated, the engine could start up without warning, resulting in
serious personal injury.
2.1
If equipped with an electric thermal
switch, make sure the engine is not running. Put the ignition switch in the ON
position (engine shut down). Place a
jumper between the thermal switch connectors (located in the engine thermostat
housing), while observing the fan clutch.
The fan clutch should be seen and heard
engaging.
If equipped with a fanstat (shutterstat),
run the engine until its temperature is
above the fanstat engagement setting of
195°F (91°C). The fan clutch should engage, causing the fan to turn.
WARNING
Wear safety goggles when draining the air system
or loosening an air line, because dirt or sludge
20/4
L-Line and A-Line Maintenance Manual, January 2007
20
Engine Cooling/Radiator
could fly out at high speeds. Do not direct the airstream at anyone. Do not disconnect pressurized
hoses, since they may whip as air escapes. Failure to take all necessary precautions could result
in personal injury.
2.2
3
2
If the fan clutch does not engage, see if
compressed air is in the fan clutch actuating air line: With the ignition on, but the
engine shut down, slowly loosen the fitting that connects the actuating air line to
the fan clutch; do not disconnect the fitting. If compressed air escapes, the fan
clutch is inoperative and must be repaired. If no compressed air escapes,
replace the solenoid valve or fanstat, as
applicable. Tighten the fitting.
4
1
5
3. Check all air connections for air leaks.
4. Check for wear on the friction facing. See Fig. 3
(Type S and HT/S) or Fig. 4 (HT 550). Replace
the facing if it is worn to 1/16-inch (1.6-mm)
thickness or less on a Type S or HT/S fan clutch,
or to 7/32-inch (5.6-mm) on an HT 550 fan
clutch.
3
1. O-Ring Seal
2. Friction Facing
3. Piston
4. Air Chamber
5. Rotary Air Union
Fig. 4, Horton HT 550 Fan Clutch
6. With the engine off and the fan clutch engaged,
use a listening device to check for air leaks. If a
leak is heard, check for air leaks in the fan clutch
by lightly brushing a soap solution in the following areas:
4
5
2
6.1
Type S and HT/S Fan Clutches (Fig. 3)
Check for air leaks at the bleed hole on
the fan pilot. Air leakage means that the
cartridge assembly (Fig. 5, Ref. 16) or
face seal (Ref. 17) is damaged.
1
f200290
08/08/94
1. System Sentry® Fuse
2. Safeguard Hole
3. Friction Facing
f500005a
10/19/93
4. Piston Friction Disc
5. Air Chamber
Fig. 3, Horton Type S and HT/S Fan Clutch
5. If equipped with a toggle switch on the dash, run
the engine with the engine temperature below
205°F (96°C) for Caterpillar engines, or below
200°F (93°C) for all other engines. Set the toggle
switch to the ON position; the fan clutch should
engage. Set the toggle switch to the AUTO or
OFF position; the air should exhaust and the fan
clutch should disengage. Replace the switch if
necessary.
L-Line and A-Line Maintenance Manual, January 2007
Check for air leaks between the air chamber and the piston friction disc. Air leakage means that the large O-ring (Ref. 14)
is damaged.
Check for air leaks around the safeguard
hole on the piston friction disc. Air leakage means the small O-ring (Ref. 18) is
damaged.
Check for air leaking from the System
Sentry® fuse. Leaking air means the
clutch has gotten so hot the lead alloy in
the fuse melted. This released the clutch
before the heat could damage the clutch
bearings. Before replacing the fuse, find
and repair the source of the heat.
20/5
20
Engine Cooling/Radiator
8
7
6
19
5
20
18
4
17
3
1
14
2
21
22
23
15
13
16
12
11
9
10
24
03/30/95
f200194a
9.
10.
11.
12.
13.
14.
15.
16.
1. Mounting Bracket
2. Rear Sheave Bearing
3. Inner and Outer Bearing
Spacers
4. Forward Sheave Bearing
5. Sheave
6. Friction Facing
7. Journal Spacer
8. Socket-Head Capscrew
Rear Hub Bearing
Bearing Spacer
Splined Hub
Forward Hub Bearing
Piston Friction Disc
Large O-Ring
Locknut
Cartridge Assembly
17.
18.
19.
20.
21.
22.
23.
24.
Face Seal
Small O-Ring
Air Chamber
Socket-Head Capscrew
Stud Bolt
Lockwasher
Hexnut
Piston Assembly
Fig. 5, Horton Type S and HT/S Fan Clutch Components
6.2
HT 550 Fan Clutch (Fig. 4)
Check the rotary air union for air leaks.
Make sure the air line at the air union is
not restricted due to kinking or bending. If
air leakage is found, replace the rotary air
union (Fig. 6, Ref. 10).
Check for air leaks around the piston
(Ref. 15) and air chamber (Ref. 13). If air
leakage is found, replace the O-ring seal
(Ref. 11).
Kysor/Dynair® and K22RA Fan
Clutch
NOTE: Check the lining wear at the first M3
maintenance interval; the lining wear does not
require checking at the first M2 interval. Subse-
20/6
quent checks must be made at each M2 maintenance interval.
1. Disconnect the electrical cables from the battery.
Drain all air from the air system. If equipped with
an air starter, drain the air starter reservoir.
WARNING
If the engine starts during this procedure, the fan
could cause personal injury. If the vehicle is
equipped with an air starter, be sure that the air
starter reservoir is drained.
2. Measure the distance from the back surface of
the fan clutch retaining plate to the forwardmost
edge of the fan belt pulley. See Fig. 7, Ref. A.
L-Line and A-Line Maintenance Manual, January 2007
20
Engine Cooling/Radiator
f500006a
05/27/93
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Capscrew
Mounting Bracket
Hexnut
Washer
Drive Sleeve
Friction Disc
Capscrew
14.
15.
16.
17.
18.
19.
Panhead Screw
Retaining Washer
Rotary Air Union
O-Ring Seal
Setscrew
Air Chamber Assembly
O-Ring Seal
Piston Assembly
Friction Facing
Capscrew
Washer
Compression Spring
Fig. 6, Horton HT 550 Fan Clutch Components
3. Disconnect the line from the air inlet of the air
cylinder. Connect a shop air hose to the inlet.
4. Apply a minimum of 100 psi (690 kPa) air pressure to the air cylinder—the bearing housing will
move backwards, disengaging the clutch. Again,
measure the distance from the back surface of
the retaining plate to the forwardmost edge of
the fan belt pulley.
5. Compare the two measurements; if the difference
exceeds the wear limit given in Table 4 for the
Kysor/Dynair, or exceeds the wear limit of 0.15
inch (3.8 mm) for the Kysor K22RA, the clutch
lining is worn and must be replaced. See Group
20 of the L-Line and A-Line Workshop Manual
for overhaul instructions.
6. Release the air pressure, then disconnect the
shop hose from the air inlet of the air cylinder.
Connect the vehicle air hose to the inlet.
L-Line and A-Line Maintenance Manual, January 2007
Kysor/Dynair Fan Clutch Wear Limits
Model Numbers*
Retaining Plate
Fasteners*
Wear Limit:
in (mm)
1090–05261–01
1090–05262–01
1090–05261–02
1090–05262–02
Bolt, Lockwasher,
and Nut
0.16 (4.1)
1090–06620–01
1090–06060–01
1090–07050–01
1090–08000–01
1090–06620–02
1090–06060–02
1090–07050–02
Capscrew and
Lockwasher
0.17 (4.3)
* The fan clutch model number is stamped on the tag on the air cylinder.
Also, the models can be identified by the type of retaining plate fasteners
used.
Table 4, Kysor/Dynair Fan Clutch Wear Limits
7. Connect the electrical cables to the battery. If
equipped with an air starter, charge the air
starter reservoir.
20/7
20
Engine Cooling/Radiator
2. Inspect the electrical connections and wires to
the fan clutch solenoid. Secure the connection if
loose; replace wires and connectors if damaged.
3
2
3. Clean the fan clutch air solenoid valve filter, if
equipped.
1
4
5
6
A
f200237a
05/27/93
A. With the fan clutch engaged, measure the distance
here; measure it again with the fan clutch
disengaged.
1. Bearing Housing
2. Retaining Plate
3. Fan Pulley
4. Air Inlet (from the solenoid valve)
5. Air Cylinder
6. Fan
Fig. 7, Kysor/Dynair and Kysor K22RA Fan Clutch
Lining Wear Checking
8. Start the engine. The LOW WTR light and warning buzzer should be off. If the light and buzzer
are off, the sensor is okay. If the light and buzzer
are on, replace the sensor.
Horton
DriveMaster®
Fan Clutch
NOTE: If any part of the fan clutch needs to be
repaired or replaced after performing the checks
below, see Group 20 of the L-Line and A-Line
Workshop Manual.
1. Disconnect the batteries at the negative terminals. Drain all air from the air system. If
equipped with an air starter, drain the air starter
reservoir.
WARNING
Make sure the batteries are disconnected before
checking the fan clutch. If the engine starts during
this procedure, the fan could engage, which could
result in serious personal injury.
20/8
3.1
Unscrew the fan clutch solenoid valve air
filter assembly and remove the filter element.
3.2
Clean the filter element with cleaning solvent.
3.3
Using a clean, lint free cloth, wipe off any
excess solvent.
3.4
Reassemble the clutch valve solenoid air
filter assembly and install on the vehicle.
4. Visually check the fan for bent, cracked, or damaged blades. Replace if damaged. Check for adequate clearance between the fan and other
components.
5. Check the fan belt for wear, tension, and alignment. Correct, if necessary.
6. Check for wear on the friction facing. Replace
the friction facing if it is worn to a 3/16-inch (4.8mm) thickness or less. Also check the facing for
signs of oil contamination or burn marks. If evidence of oil or burn marks are found, replace the
friction facing.
7. Connect the battery cables. Start the engine, and
charge the air system to 120 psi (827 kPa).
Manually engage and disengage the fan clutch.
Check the fan and the fan clutch from a distance. Look for vibration, fan blade contact, fan
clutch slippage, and overall fan clutch operation.
If the fan clutch does not operate correctly, see
Group 20 of the L-Line and A-Line Workshop
Manual for troubleshooting and repair procedures.
8. With the air system charged to 120 psi (827
kPa), check the fan clutch for audible air leaks,
using a suitable listening device.
Check at the solenoid valve, the air filter assembly, and the air hoses and fittings. See Fig. 8.
Using a wet finger or a soapy water solution,
check for a leak in the same areas.
L-Line and A-Line Maintenance Manual, January 2007
20
Engine Cooling/Radiator
05/30/2002
f200581
Fig. 8, Checking for Air Leaks (Horton DriveMaster)
9. If a leak is detected, remove the fan blade. Install a new seal kit. See Group 20 of the L-Line
and A-Line Workshop Manual for repair procedures.
10. Check the fan drive for discoloration or any other
signs of slipping or overheating.
NOTE: The fan clutch may slip if the air supply
pressure is below 70 psi (483 kPa) or if there is
a leak inside the fan clutch. Any leak must be
remedied.
11. Check the fan clutch bearings.
11.1
Turn the fan in both directions and feel
for worn hub bearings.
11.2
If possible, remove the drive belt and
check for worn sheave bearings by turning the sheave in both directions.
11.3
If either the hub or sheave bearings are
worn, replace them, using a Horton DriveMaster Super Kit.
For instructions and kit part number, see
Group 20 of the L-Line and A-Line Workshop Manual.
L-Line and A-Line Maintenance Manual, January 2007
20/9
Clutch
25
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Clutch Release Bearing Lubricating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25–01
L-Line and A-Line Maintenance Manual, October 1999
25
Clutch
25–01 Clutch Release Bearing
Lubricating
NOTE: For a clutch with a sealed release bearing, the release bearing is lubricated at the time
of manufacture and requires no additional
grease for the life of the bearing. This type of
release bearing is not equipped with a grease
fitting.
outside the bell housing, lubricate the bearing
with the engine running.
Using a pressure gun and high-temperature grease
only, lubricate the release bearing at the grease fitting until grease starts coming out of the fitting. Do
not use chassis lube or multipurpose lubricants.
For a clutch with a grease-type release bearing (see
Fig. 1), wipe the dirt from the grease fitting.
CAUTION
Do not over-lubricate the clutch release bearing.
Over-lubrication could contaminate the clutch internally, causing clutch slippage and premature
failure. Do not use chassis grease or multipurpose
lubricants.
05/27/93
f250081a
Fig. 1, Release Bearing Grease Fitting
IMPORTANT: If the release bearing is not
equipped with a grease-fitting extension that
extends outside the bell housing, lubricate the
bearing with the engine stopped. If equipped
with a grease-fitting extension that does extend
L-Line and A-Line Maintenance Manual, October 1999
25/1
Transmission
26
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Allison Transmission Fluid and Filter Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26–01
Manual Transmission Magnetic Plug Cleaning and Oil Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26–02
Transmission Air Filter/Regulator Checking and Cleaning, or Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . 26–03
Transmission Breather and Oil Level Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26–04
L-Line and A-Line Maintenance Manual, June 2000
26
Transmission
26–01 Allison Transmission
Fluid and Filter
Changing
When draining transmission fluid, check for evidence
of dirt or water contamination. A small amount of
condensation will appear in the fluid during operation.
1
1
Water contamination is normally characterized as a
milky discoloration of the transmission fluid. Obvious
contamination of the transmission fluid indicates a
leak between the water and fluid areas of the transmission cooler. Inspect and pressure-test the cooler
to confirm the leak; replace leaking transmission
coolers.
1. Park the vehicle on a level surface. Apply the
parking brakes and chock the tires.
2. Operate the vehicle until the transmission
reaches normal operating temperature: 160 to
200°F (71 to 93°C).
3. Clean the area around the drain plug and the
transmission fluid pan. Place a drain pan under
the transmission and remove the drain plug. Examine the fluid as it drains. If the filter is the only
component being changed, do not drain the fluid.
2
2
3
4. Remove the 12 mounting bolts (6 each) from the
two filter covers.
3
5. Remove the filter covers, O-rings, and two
square-cut seals from the transmission. See
Fig. 1.
4
8. Install a new square-cut seal on each cover assembly, and install the fluid filter elements on the
cover assemblies.
9. Install the filter and cover assemblies into the
filter compartment.
10. Align each cover assembly with the holes in the
channel plate sump, and push the cover assemblies in by hand to seat the seals.
1
1
6. Remove the filters from the bottom of the control
module.
7. Lubricate the new O-rings with transmission fluid,
and install them on the cover assemblies.
4
f260317
08/25/95
1. Filter Cover
2. Filter Element
3. Filter Element O-Ring
4. Square-Cut Seal
Fig. 1, Allison Transmission Filter Location and
Components
CAUTION
Do not use the bolts to draw the filter covers to
the sump. This can damage the covers, seals, or
sump.
11. Install six bolts in each cover, and torque the
bolts 38 to 44 lbf·ft (51 to 61 N·m).
L-Line and A-Line Maintenance Manual, June 2000
26/1
26
12. Replace the drain plug O-ring, and install the
drain plug. Tighten the drain plug 18 to 24 lbf·ft
(25 to 32 N·m).
13. Refill the transmission with fresh Dexron® III
transmission fluid and check the fluid level.
Transmission
build-up, which could cause oil leakage. If the
breather is plugged, clean or replace it. See
Fig. 2. Check more often if the vehicle operates
under very dusty conditions.
NOTE: Do not overfill the transmission. Follow
instructions in Maintenance Operation 26–04.
26–02 Manual Transmission
Magnetic Plug Cleaning
and Oil Changing
Manual Transmission Oil Change
IMPORTANT: For all transmissions that are filled
with approved synthetic lubricants, the lubricant
must be changed every 500,000 miles (800 000
km). Transmissions with petroleum-based lubricants must have the lubricant changed at each
Maintenance 2 (M2) interval. All transmissions
with synthetic or petroleum-based lubricants
must have the transmission breather checked
and the magnetic plugs cleaned at each M1
interval.
NOTE: For vehicles equipped with auxiliary
transmissions, use this procedure to change the
auxiliary transmission oil and to check the auxiliary transmission breather whenever changing
the main transmission oil and checking the main
transmission breather.
1. With the vehicle parked on level ground, apply
the parking brakes, and chock the tires. Place a
large drain pan under the transmission.
2. Clean the area around the fill plug, and remove it
from the side of the case. Remove each drain
plug from the bottom of the transmission case.
Drain the oil while the transmission is warm.
3. Clean the fill and drain plugs. For magnetic
plugs, use a piece of key stock or any other convenient steel slug to short the two magnetic
poles and divert the magnetic field.
05/27/93
f260007a
Fig. 2, Transmission Breather (Fuller shown)
IMPORTANT: Do not mix types and brands of
oil, because of possible incompatibility. Do not
use oil additives, friction modifiers, extremepressure gear oils, or multiviscosity lubricants.
Do not use extreme-pressure additives, such as
those found in multipurpose or rear axle-type
lubricants. These additives are not required, and
may create transmission problems. Multipurpose
oils have relatively poor oxidation stability, a
high rate of sludge formation, and a greater tendency to react on or corrode steel and bronze
parts.
NOTE: The correct oil capacity is established by
the fill opening.
6. Add oil until it is level with the lower edge of the
fill opening. If the transmission has two fill openings, add oil to the level of both openings. See
Fig. 3. See Table 1 for transmission lubricant
capacities, and see Table 2 for approved transmission lubricants.
4. Install and tighten each drain plug 50 lbf·ft (68
N·m).
5. Transmission housing breathers must remain
clear. A plugged breather could result in pressure
26/2
L-Line and A-Line Maintenance Manual, June 2000
26
Transmission
Transmission Lubricant Capacities
Transmission Make and Model
Capacity:
pt (L)
Allison
AT–542
30 (14.2)
AT–545
40 (18.9)
MT–600
34 (16.1)
05/27/93
MT–700
60 (28.4)
A. Full
MD Series
58 (27.4)
HD Series
102 (48.2)
FS–4205
11.5 (5.2)
FS–5205
12.5 (5.9)
FS–6305
19.0 (9.0)
Eaton 6-Speed
18.0 (8.5)
Eaton 9-Speed
Fuller RT–6609
12.0 (5.7)
All Others
27 (12.8)
Eaton 10-Speed
Fuller FR/FRO–11210, FR/FRO–12210,
FR/FRO–13210, FR/FRO–14210,
FR/FRO–15210, FR/FRO–16210,
23.5 (11.1)
Fuller RT/RTX–11710, RT/RTX–12710,
RT/RTX–13710, RT/RTX–14710,
RTX–15710, RTX–16710
26.0 (12.3)
All Others
28.0 (13.2)
Eaton 11-Speed
All
f260006a
B. Low
Fig. 3, Checking Transmission Oil Level
CAUTION
Eaton 5-Speed
FS–5306/6306
B
A
28 (13.2)
Operating a Fuller or Spicer transmission with the
oil level higher or lower than recommended can
result in transmission damage. Do not overfill the
transmission. On Fuller transmissions, overfilling
will force oil out of the case through the main
shaft openings. On Spicer transmissions, overfilling usually causes oil breakdown, due to excessive heat and aeration from the churning action of
the gears. Early breakdown of the oil causes
heavy varnish and sludge deposits that plug oil
ports and build up on splines and bearings. Oil
overflow may also drain onto the clutch or clutch
brake, causing additional problems.
7. For a transmission equipped with an oil pump or
an oil cooler, operate the engine for five minutes
after filling the transmission, then check the oil
level again.
8. Install the fill plug, then tighten it 50 lbf·ft (68
N·m).
9. Operate the vehicle to check for correct operation.
Eaton 13-Speed
All
28 (13.2)
Eaton 15-Speed
All
28 (13.2)
Eaton 18-Speed
All
28 (13.2)
Table 1, Transmission Lubricant Capacities
L-Line and A-Line Maintenance Manual, June 2000
26/3
26
Transmission
Approved Transmission Lubricants
Lubricant Type*
Transmission
Allison
Fuller
Temperature
SAE Viscosity
Dexron® III
Above -17°F (–27°C)
—
Heavy-Duty Engine Oil meeting MIL–L–2104B, C, or D, or API
Service Classification SF or CD (previous API designations
are acceptable)
Above +10°F (–12°C)
50 or 40
Below +10°F (–12°C)
30
Mineral Gear Oil with Rust and Oxidation Inhibitor API–GL–1
Heavy-Duty Engine Oil meeting API Service Classification SF
or SG, or API Service Classification CD or CE, or MIL–L–
2104B, C, or D
Meritor
Mineral Gear Oil with Rust and Oxidation Inhibitor API–GL–1
Above +10°F (–12°C)
90
Below +10°F (–12°C)
80W
Above +10°F (–12°C)
50 or 40
Below +10°F (–12°C)
30
Above +10°F (–12°C)
90
Below +10°F (–12°C)
80
All
50
Above 0°F (–18°C)
30, 40, or 50
Below 0°F (–18°C)
30
Above 0°F (–18°C)
90
Below 0°F (–18°C)
80
All
50 or 30
Synthetic Engine Oil meeting Meritor Specification 0–81
Heavy-Duty Engine Oil meeting MIL–L–2104D or MIL–L–
46152B, or API Service Classification SF or CD (MIL–L–
2104B and C, or MIL–L–46152 are acceptable)
Spicer
Mineral Gear Oil with Rust and Oxidation Inhibitor API–GL–1
Synthetic Engine Oil meeting MIL–L–2104D or MIL–L–
46152B, or API Service Classification SF or CD
* Lubricants listed in order of preference. Do not mix types or brands of oil. Multi-weight and extreme-pressure gear oils are not recommended.
Table 2, Approved Transmission Lubricants
26–03 Transmission Air Filter/
Regulator Checking and
Cleaning, or Replacing
Fuller Transmission
WARNING
Drain the air supply; if the air supply is not
drained before the air filter/regulator is serviced,
serious injury and component damage could
result.
1. Apply the parking brakes and chock the tires.
Drain the air from the air reservoirs.
2. Clean the outside of the air filter/regulator with
cleaning solvent, then let it air dry. See Fig. 4.
3. Remove the end cap, large O-ring, and filter element from the filter housing. See Fig. 5. Remove
the small O-ring from the end cap.
26/4
NOTE: Do not remove, disassemble, or adjust
the air regulator. If the air regulator is not keeping the air pressure between 58 and 63 psi (400
and 434 kPa), replace the air filter/regulator,
which is not serviceable.
WARNING
Wear eye protection when using compressed air
to clean parts, as permanent harm to eyes could
result from flying debris.
4. Clean the filter element by dipping it in alcohol or
other cleaning solvent. Blow compressed air
through the filter element (inside to outside) to
loosen surface dirt and to dry the element. If it is
not damaged, the sintered metallic filter element
will last the life of the vehicle.
Wipe out the filter housing with a clean, dry, lintfree rag. Clean and inspect the O-rings and the
end cap. Replace any parts that are damaged.
L-Line and A-Line Maintenance Manual, June 2000
26
Transmission
7. Start the engine, and build pressure in the air
system. Check for air leaks at the filter housing
and air line connections; repair any leaks.
CAUTION
A leaking air filter or air lines can cause slow or
hard shifting of the transmission, and eventual
transmission damage.
Spicer Transmission
WARNING
Drain the air supply; if the air supply is not
drained before the air filter/regulator is serviced,
serious injury and component damage could result.
1. Apply the parking brakes, and chock the tires.
Drain the air from the air reservoirs.
f260037a
05/27/93
Fig. 4, Air Filter/ Regulator Location (Fuller
transmission shown)
2
3
4
5
6
2. Clean the outside of the air filter/regulator
(Fig. 6) with cleaning solvent, then let it air dry.
7
1
2
3
4
5
6
7
8
05/27/93
1
f260052a
10/17/2001
1.
2.
3.
4.
Air Regulator
Housing
Large O-Ring
Filter Element
5. Small O-Ring
6. End Cap
7. Plug
Fig. 5, Eaton Fuller Transmission Air Filter/Regulator
Components
5. Install the large O-ring, then the filter element
(small end first) into the filter housing.
6. Install the small O-ring in the end cap, then install the end cap and tighten it 8 to 12 lbf·ft (11
to 16 N·m).
L-Line and A-Line Maintenance Manual, June 2000
1.
2.
3.
4.
5.
Regulator
Louver
Upper Gasket
Element
Lower Gasket
9
f260053a
6.
7.
8.
9.
Stud
O-Ring
Bowl
Drain Valve
Fig. 6, Spicer Transmission Air Filter/Regulator
Components
3. Loosen or remove the air filter/regulator bracket
clamp, then unscrew the bowl; hold the regulator
to prevent it from turning. Remove the O-ring.
4. Unscrew the stud from the regulator. Remove the
louver, upper gasket, element, and lower gasket
from the stud.
26/5
26
Transmission
WARNING
2. Clean the outside of the air filter/regulator with
cleaning solvent, then let it air dry.
Wear eye protection when using compressed air
to clean parts, as permanent harm to eyes could
result from flying debris.
3. Remove the end cap from the air filter/regulator
assembly, then inspect the O-rings in the end
cap. Replace worn or damaged O-rings.
5. Clean and inspect all parts. Use only a
petroleum-based solvent to clean the parts. Blow
air through the filter element (inside to outside) to
loosen surface dirt.
4. Remove the element from the filter/regulator assembly.
IMPORTANT: After three cleanings, replace the
filter element with a new one.
Do not disassemble the regulator, as it is not
repairable. If the air regulator does not work
properly, replace the unit.
6. Install the lower gasket, the cleaned or new element, the upper gasket, and the louver, on the
stud. Install the element so the large end of the
internal taper (thinnest wall section) is toward the
hex on the stud.
7. Install and tighten the stud 5 to 10 lbf·in (60 to
100 N·cm).
8. Apply a light coat of Dow Corning DC7 silicone
grease, or an equivalent, to the O-ring seating
surfaces on the regulator and the bowl.
9. Apply a light, even coat of Molykote "G," or an
equivalent, to the bowl threads. Install and
tighten the bowl 5 to 10 lbf·in (60 to 100 N·cm).
10. Install and/or tighten the air filter/regulator
bracket clamp.
11. Install and torque the drain valve, if removed, 10
to 15 lbf·in (120 to 160 N·cm).
12. Build air pressure in the system, check for leaks,
and make any necessary repairs.
Meritor Transmission
WARNING
Drain the air supply; if the air supply is not
drained before the air filter/regulator is serviced,
serious injury and component damage could result.
1. Apply the parking brakes, and chock the tires.
Drain the air from the air reservoirs.
26/6
5. Inspect the element for oil. If oil is in the element, replace the element. Inspect the air supply
system for the source of oil, and service it as
needed.
6. Install the element in the filter/regulator assembly.
7. Apply a light coat of Dow Corning DC7 silicone
grease, or an equivalent, to the O-rings in the
end cap.
8. Install and tighten the end cap 10 to 15 lbf·ft (14
to 20 N·m).
9. Build air pressure in the system, check for leaks,
and make any needed repairs.
26–04 Transmission Breather
and Oil Level Checking
NOTE: For vehicles with auxiliary transmissions,
use this procedure to check the auxiliary transmission oil level and breather whenever checking the main transmission oil level and breather.
Breather Check
Transmission housing breathers must remain clear. A
plugged breather could result in pressure build-up,
which could cause oil leakage.
If the breather is plugged, clean or replace it. See
Fig. 2. Check more often if the vehicle operates
under very dusty conditions.
Allison Transmission
CAUTION
Operating a transmission with the fluid level
higher or lower than recommended can result in
transmission damage. Do not overfill the transmission.
L-Line and A-Line Maintenance Manual, June 2000
26
Transmission
Do not mix types and brands of fluid, because of
possible incompatibility. Do not use fluid additives, friction modifiers, extreme-pressure gear
fluids, or multiviscosity lubricants.
B
A
Cold Check
Clean all dirt from around the end of the fluid fill tube
before removing the dipstick. Do not allow foreign
matter to enter the transmission. Dirt or foreign matter in the hydraulic system may cause undue wear of
transmission parts, make valves stick, and clog passages.
It is important to check the fluid level cold to determine if the transmission has a sufficient amount of
fluid to be safely operated until a hot check can be
performed.
1. Park the vehicle on a flat, level surface.
2. Apply the parking brake and chock the tires.
3. Run the engine for at least one minute.
4. Shift from DRIVE to NEUTRAL, and then shift to
REVERSE to fill the hydraulic system.
5. Shift to NEUTRAL and allow the engine to idle at
500 to 800 rpm.
6. With the engine running at idle, remove the dipstick from the tube and wipe it clean.
7. Insert the dipstick into the tube and remove the
dipstick.
8. Check the fluid level reading and repeat the
check procedure to verify the reading.
If the fluid level is within the COLD RUN band,
the transmission may be operated until the fluid
is hot enough to perform a hot check.
If the fluid level is not within the COLD RUN
band, add or drain fluid as needed to adjust the
fluid level to the middle of the COLD RUN band.
See Fig. 7.
CAUTION
As the fluid temperature increases, so does the
fluid level. Do not fill above the COLD RUN band if
the transmission fluid is below normal operating
temperature.
NOTE: Perform a hot check at the first opportunity after the normal operating temperature, 160
to 200°F (71 to 93°C), has been reached.
L-Line and A-Line Maintenance Manual, June 2000
f270002a
12/01/97
A. Cold Run Band
B. Hot Run Band
Fig. 7, Dipstick Markings
Hot Check
1. Park the vehicle on a flat, level surface. Apply
the parking brake and chock the tires.
2. Shift the transmission to NEUTRAL.
3. Operate the engine at idle (500 to 800 rpm) until
normal operating temperature is reached. Check
that the sump temperature is 160 to 200°F (71 to
93°C). Check that the converter-out temperature
is 180 to 220°F (82 to 104°C).
4. With the engine idling, remove the dipstick from
the tube and wipe it clean.
5. Insert the dipstick into the tube and remove the
dipstick.
6. Check the fluid level reading and repeat the
check procedure to verify the reading. Safe operating level is within the HOT RUN band on the
dipstick. The HOT RUN band is between the
HOT FULL and HOT ADD marks.
If the fluid level is not within the HOT RUN band,
add or drain fluid as needed to bring the fluid
level within the HOT RUN band. See Fig. 7.
Eaton/Fuller Transmission
CAUTION
Operating a transmission with the fluid level
higher or lower than recommended can result in
transmission damage. Do not overfill the transmission. Overfilling will force fluid out of the case
through the main shaft openings.
Do not mix types and brands of fluid, because of
possible incompatibility. Do not use fluid addi-
26/7
26
Transmission
tives, friction modifiers, extreme-pressure gear
fluids, or multiviscosity lubricants.
With the transmission at operating temperature, and
the vehicle on a level surface, check the fluid level in
the transmission.
1. Clean the area around the fill plug, and remove it
from the side of the case.
2. Using your finger or a bent pipe cleaner, see if
the fluid is level with the fill opening. See Fig. 3.
3. If the transmission fluid level is low, check the
transmission for leaks, and correct as needed.
4. If needed, add the recommended fluid, until it is
level with the lower edge of the fill opening. See
Table 2 for approved transmission lubricants.
5. Clean the fill plug, install it in the transmission,
then tighten it 50 lbf·ft (68 N·m).
Meritor Transmission
CAUTION
Operating a transmission with the fluid level
higher or lower than recommended can result in
transmission damage. Do not overfill the transmission.
Do not mix types and brands of fluid, because of
possible incompatibility. Do not use fluid additives, friction modifiers, extreme-pressure gear
fluids, or multiviscosity lubricants.
1. Remove the fill plug from the transmission.
2. Insert a finger or pipe cleaner into the transmission.
3. Check that the fluid level is even with the base of
the fill plug. See Fig. 3.
The correct fluid capacity is established by the fill
opening. If the transmission has two fill plugs,
check that the fluid level is consistent at both fill
plugs.
4. If the transmission fluid level is low, check the
transmission for leaks, and correct as needed.
5. If needed, add the recommended fluid, until it is
level with the lower edge of the fill opening. See
Table 2 for approved transmission lubricants.
26/8
L-Line and A-Line Maintenance Manual, June 2000
Frame and Fifth Wheel
31
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Fifth Wheel Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31–01
Fifth Wheel Lubricating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31–02
Frame Fastener Torque Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31–03
Holland Fifth Wheel Sliding Mechanism Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31–04
Trailer Electrical Connector Lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31-05
L-Line and A-Line Maintenance Manual, January 2007
31
Frame and Fifth Wheel
31–01 Fifth Wheel Inspecting
WARNING
All fifth wheel maintenance, adjustment, and rebuilding must be done only by a qualified mechanic. Improper or incomplete procedures could
result in a possible disengagement of the trailer
from the tractor, which could result in personal
injury or property damage.
Parts are under spring compression. Wear safety
goggles while servicing the fifth wheel. Failure to
do so can result in personal injury, due to parts
ejecting with force.
Fontaine
1. Disconnect the tractor from the trailer. For instructions, see Chapter 10 of the L-Line and
A-Line Driver’s Manual.
2. Thoroughly clean the fifth wheel.
3. Look for cracks in the fifth wheel assembly,
mounting brackets, and mounting parts.
4. Check the jaw and stationary jaw for mushrooming, and check that the serrations at the jaw and
wedge are in good condition.
5. Test the safety lock latch for ease of operation.
NOTE: The safety lock latch is located at the
front of the fifth wheel on the top plate.
6. Check for loose nuts or bolts (see Fig. 1) on the
fifth wheel and on the mounting. Set a torque
wrench to the maximum torque value for the bolt
being checked, and confirm that the torque is to
specification. Do not loosen the bolt to check the
torque value. See Group 00 of this manual for
bolt torque specifications.
7. Visually check all springs to see if they are securely fastened, and are not deformed.
8.2
Release the lock by tripping the release
latch at the bottom of the throat.
8.3
Adjust the wedge stop at the end of the
wedge to approximately 1/4-inch (6-mm)
clearance by turning the wedge stop rod
located on the right side of the top plate.
9. Replace cracked, worn, or damaged parts with
new parts. Replace all loose mounting bolts with
5/8–11 SAE grade 8 bolts, grade C locknuts, and
hardened washers. Do not re-use bolts, nuts,
and washers on fifth wheel mountings.
10. After inspecting the fifth wheel, lubricate all moving parts with a chassis or multipurpose grease.
Apply a generous coating of grease to the top
plate to fill the grooves, or depressions, on the
top plate. See Maintenance Operation 31–02
for lubrication instructions.
Holland
1. Disconnect the tractor from the trailer. For instructions, see Chapter 10 of the L-Line and
A-Line Driver’s Manual.
2. Thoroughly steamclean the fifth wheel.
3. Check for loose nuts or broken bolts on the fifth
wheel assembly.
4. Inspect for cracks or wear on the mounting bolts.
5. Visually inspect for improper locking action, and
for cracks or wear on the jaw locking mechanism.
6. Check the depth of the grease grooves. If the
depth of the grooves is 1/8 inch or less, replace
the fifth wheel top plate. See Group 31 of the
L-Line and A-Line Workshop Manual.
7. Check the condition of the X-pattern cast into the
underside of the fifth wheel top plate. See Fig. 2.
The fifth wheel top plate must be removed to
check the X-pattern.
7.1
Remove the roll pins from the bushing
pins. Remove the bushing pins from the
slide mount. Using a hoist, lift the fifth
wheel top plate off of the vehicle.
7.2
Turn the fifth wheel top plate over with
the locks open. Check the condition of
the X-pattern in the pockets. If the
X-pattern is worn away, replace the fifth
wheel top plate.
WARNING
Do not disassemble the fifth wheel to inspect the
springs. The springs are under extreme pressure,
and could cause serious injury.
8. Check wedge adjustment.
8.1
Open the kingpin lock, and vertically insert a 2-inch-diameter shaft.
L-Line and A-Line Maintenance Manual, January 2007
31/1
31
Frame and Fifth Wheel
13
14
10
15
1
11
12
3
2
16
14
9
4
17
18
1
1
21
22
19
2
3
20
21
23
4
25
5
21
8
23
6
1
6
7
26
24
f310476
09/18/95
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
3/16" x 1" Cotter Pin
Lower Bracket Retainer Pin
Grease Fitting
Lower Bracket Pin
Wedge Stop Rod
Flatwasher
Wedge Stop Rod Spring
Wedge Stop Rod Nut
Side Release Upper Assembly
Leaf Spring
11. 1/4–20 x 3/8 Thread-Cutting
Screw
12. Step Jaw and Wedge
13. Jaw Spring
14. 1/4" x 3" Cotter Pin
15. Timer
16. Wedge Spring
17. Pull Handle
18. Bumper Handle Spring
19.
20.
21.
22.
23.
24.
25.
1/2–13 x 2 Bumper Pivot Bolt
Bumper
Flatwasher
5/16" Bumper Pivot Bushing
1/2–13 Locknut
7/16" Handle Pivot Bushing
Operating Handle (side-release
only)
26. 1/2–13 x 2 Handle Pivot Bolt
Fig. 1, Fontaine H5092 Series Fifth Wheel (Left-Side Release Shown)
7.3
Install the fifth wheel top plate, bushing
pins, and roll pins.
8. Inspect for fatigue or cracked welds.
9. Replace cracked, worn, or damaged parts with
new parts. Replace all loose mounting bolts with
5/8–11 SAE grade 8 bolts, grade C locknuts, and
hardened washers. Do not re-use bolts, nuts,
and washers on fifth wheel mountings.
10. After inspecting the fifth wheel, lubricate all moving parts with a chassis or multipurpose grease.
See Maintenance Operation 31–02 for lubrication instructions.
31/2
31–02 Fifth Wheel Lubricating
To maintain proper fifth wheel operation, always lubricate the fifth wheel after an inspection has been
performed.
IMPORTANT: Lubricate the fifth wheel:
• After power washing, or steam cleaning;
• If the vehicle operates in harsh conditions such
as salt spray from road surfaces, or in extremely dusty environments;
L-Line and A-Line Maintenance Manual, January 2007
31
Frame and Fifth Wheel
1
2
3
18
4
17
5
15
6
10
7
16
8
9
15
14
14
11
08/29/95
1.
2.
3.
4.
5.
6.
13
Locknut, 3/4–16
Washer
Rubber Washer
Lock Adjustment Tag
Yoke Shaft
Yoke Subassembly
12
13
7.
8.
9.
10.
11.
12.
f310472
Torsion Spring
Roll Pin
Secondary Lock, Right-Hand
Cam Plate
Lock Guard
Pin
13.
14.
15.
16.
17.
18.
Lock Pin
Lock Jaw
Washer
Right-Hand Release Handle
Left-Hand Release Handle
Secondary Lock, Left-Hand
Fig. 2, Holland Fifth Wheel
• After any operation that requires the removal of
lubrication from the fifth wheel head or components.
L-Line and A-Line Maintenance Manual, January 2007
WARNING
Failure to properly lubricate the fifth wheel could
result in a possible disengagement of the trailer
31/3
31
from the tractor, which could result in personal
injury or property damage.
Frame and Fifth Wheel
See the applicable torque table in Group 00 for
torque specifications.
Fontaine
Use a multipurpose extreme pressure (EP) chassis
grease, and lubricate all moving parts on the fifth
wheel. When lubricating the top plate at the grease
fittings for the bracket bearing area, tilt the top plate
forward and backward to evenly distribute the
grease. Using a pry tool, separate the jaw and
wedge and lubricate the serrations using a brush to
distribute the grease. On slide-mount applications,
lubricate the slide rail and tapered wedges for
smooth operation.
CAUTION
Make sure frame fasteners are properly tightened.
Continued vehicle operation with loose fasteners
could result in bracket or frame damage.
NOTE: Engine supports on vehicles built from
January 2007 do not require checking.
Inspect and check the fasteners at the following
locations:
• axle stops
Once the moving parts of the fifth wheel are lubricated, apply a liberal coating of grease to the top
plate and the trailer kingpin plate.
• deck plates
Holland
• exhaust brackets
Lubricate all moving parts with a multipurpose chassis grease. Lubricate the two grease fittings located
on either side of the top plate with a multipurpose
chassis grease.
• fifth wheel legs
Once the fifth wheel’s moving parts are lubricated,
apply a heavy coat of grease to the top plate by direct application. On slide-mount applications, lubricate the baseplate rails and the plungers for smooth
operation.
• front frame brackets
31–03 Frame Fastener Torque
Checking
Frame brackets and components secured with Huckbolt® fasteners do not require a torque check, however, they should be inspected for damage. Frame
brackets and components secured with conventional
bolts and nuts are to be checked at Initial Maintenance (IM). Check the torque of frame fasteners to
offset the effects of "bedding in" (or seating). When
checking torque, torque the nut, not the bolt head
whenever possible. This will give a true torque reading by eliminating bolt body friction. When checking
the torque of frame fasteners, inspect the frame for
cracks and other damage. Set a click-type torque
wrench to the maximum torque of the fastener you
are checking. Apply pressure until the torque wrench
clicks. Do not loosen the bolt to check the torque.
31/4
• engine trunnion supports
• equalizer brackets
• fifth wheel mountings
• frame crossmembers and gussets
• front suspension spring brackets
• fuel tank brackets
• radius rods
• rear engine supports
• rear suspension spring brackets
• shock absorbers
• all other frame fasteners
Any component that shows signs of cracking, or
other damage must be repaired or replaced. Refer to
the vehicle workshop manual for repair or replacement information in the respective section for the
component in question.
31–04 Holland Fifth Wheel
Sliding Mechanism
Inspecting
1. Loosen the locking plunger jam nut and turn the
adjusting bolt out (counterclockwise). See Fig. 3.
L-Line and A-Line Maintenance Manual, January 2007
31
Frame and Fifth Wheel
4
2
3
1
11/21/95
1. Rack
2. Plunger
f310371
3. Pocket
4. Plunger Adjusting Bolt
Fig. 3, Locking Plungers
2. Disengage and engage the locking plungers.
Check that the plungers are securely seated
without binding. If the locking plungers do not
operate properly, see Group 31 of the L-Line
and A-Line Workshop Manual for adjustment procedures.
3. Turn the adjusting bolt in (clockwise) until it contacts the rack. Turn the adjusting bolt an additional 1/2 turn, then securely tighten the locking
nut.
31-05 Trailer Electrical
Connector Lubricating
In some cases, failure of trailer cables occurs due to
intrusion of chloride-based road deicing chemicals
into the trailer connector. Once inside the connector,
the chloride-based chemicals corrode the brass terminals and create bridging between positive and
ground terminals.
NOTE: The use of soap is not recommended for
cleaning the electrical connector, as some
soaps may increase the corrosion process.
1. Wash out any existing grease, dirt, and corrosion
on the trailer connectors with electrical contact
cleaner spray.
2. Grease the trailer connector with a lithium-based
dielectric grease.
L-Line and A-Line Maintenance Manual, January 2007
31/5
Suspension
32
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Suspension Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32–01
Suspension Lubricating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32–02
Suspension U-Bolt Torque Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32–03
L-Line and A-Line Maintenance Manual, April 1999
32
Suspension
32–01 Suspension Inspecting
Front Suspension Check
WARNING
Do not replace individual leaves of a damaged leaf
spring assembly; replace the complete spring assembly. Visible damage (cracks or breaks) to one
leaf causes hidden damage to other leaves. Replacement of only the visibly damaged part(s) is
no assurance that the spring is safe. On front
spring assemblies, if cracks or breaks exist in the
two top leaves, a loss of vehicle control could
occur. Failure to replace a damaged spring assembly could cause an accident resulting in property
damage, serious personal injury, or death.
Inspect the front spring assemblies for cracked, broken, or abnormally bent leaves. If any of these conditions exist, replace the spring assembly. See Group
32 of the L-Line and A-Line Workshop Manual for
instructions.
Front and Rear Suspension
Shock Absorber Check
Make sure the shock absorber brackets are tight,
and the shock absorber is not striking or rubbing the
frame or some other part of the chassis. Striking or
rubbing the frame is characterized by chafe marks on
the shock absorber body and the frame rail. See
Fig. 1. Check the rubber mounting bushings for
cracks, cuts, swelling, and dry rot. Also, check the
bushings for missing pieces. Replace the bushings
as needed.
Inspect the shock absorber for oil leakage. If the
shock absorber is damaged or leaking, replace it with
a new one. See Group 32 of the L-Line and A-Line
Workshop Manual for replacement instructions.
Rear Suspension Check
Spring Suspension
WARNING
Do not replace individual leaves of a damaged leaf
spring assembly; replace the complete spring assembly. Visible damage (cracks or breaks) to one
L-Line and A-Line Maintenance Manual, April 1999
11/27/95
f320465
Fig. 1, Direct-Acting Shock Absorber (Front
Suspension Shown)
leaf causes hidden damage to other leaves. Replacement of only visibly damaged parts is no assurance that the spring is safe. Failure to replace
a damaged spring assembly could cause an accident, resulting in serious personal injury or property damage.
Replace worn, cracked, or damaged spring
brackets. Failure to do so could result in bracket
breakage, possibly leading to loss of vehicle control and resulting in personal injury or property
damage.
1. Inspect the forward and rear spring brackets and
equalizer brackets for loose fasteners, wear,
cracks, and other damage. If any of these conditions exist, replace the damaged bracket(s). See
Group 32 of the L-Line and A-Line Workshop
Manual for instructions.
2. Inspect the tandem-axle frame crossmember and
gussets for loose fasteners, wear, cracks, and
other damage. If any of these conditions exist,
replace the damaged parts. See Group 32 of the
L-Line and A-Line Workshop Manual for instructions.
CAUTION
Failure to replace the suspension crossmember or
gussets if they are cracked, worn, or otherwise
damaged could result in damage to the vehicle
chassis.
3. Without detaching the radius rods, attempt to
move (by hand) each radius-rod end up, down,
in, and out. If there is any movement, replace the
32/1
32
Suspension
radius rod. If a radius rod needs to be replaced,
see Group 32 of the L-Line and A-Line Workshop Manual for instructions.
1
A
3
4. Inspect the weld seams between the radius rod
tube and the shorter bushing tubes. If there are
cracks, replace the radius rod. Do not weld the
radius rod for any reason.
5. Inspect the rubber bushing ends. See Fig. 2. Replace the radius rod for any of the following reasons:
• If there are gaps between the rubber bushing and the pin or outer steel sleeve.
2
05/27/93
f320022a
A. Measure the change in gap at this point.
1. Equalizer Bracket
3. Pry Bar
2. Equalizer
Fig. 3, Side View of the Equalizer
2
1
A
05/27/93
f320021a
3
Fig. 2, Radius Rod Bushings
• If either bushing end contacts a radius rod
pin mounting bolt.
• If there are cracks in the bushing.
05/27/93
• If part of the rubber bushing extends beyond the outer circumference of the outer
bushing sleeve.
A.
1.
2.
3.
6. Block up the frame enough to take chassis
weight off the springs. Attempt to move the
equalizer up and down, using a pry bar between
the top of the equalizer and top of the equalizer
bracket; apply hand pressure only. See Fig. 3. If
movement at the center of the equalizer exceeds
1/8 inch (3 mm), replace the equalizer bushings.
See Group 32 of the L-Line and A-Line Workshop Manual for instructions.
7. With the vehicle unloaded, attempt to move the
equalizer side-to-side, using a pry bar between
the equalizer and frame rail. Apply hand pressure
only. See Fig. 4. If clearance between the equalizer assembly and any frame component or fas-
32/2
4
5
f320023a
1/8 inch (3 mm) Clearance
Frame Fasteners
4. Equalizer
Frame Rail
5. Equalizer Bracket
Pry Bar
Fig. 4, Top View of the Equalizer
tener is less than 1/8 inch (3 mm), replace the
equalizer bushings. See Group 32 of the L-Line
and A-Line Workshop Manual for instructions.
Hendrickson Spring/Walking Beam
Suspension, Models RT, RTE, and
RTEA
1. Inspect the suspension assembly for loose fasteners, wear, cracks, and damage to its components. Replace the component(s) if any wear,
cracks, or damage exist. If any of these condi-
L-Line and A-Line Maintenance Manual, April 1999
32
Suspension
tube-type beam end connection (see Fig. 8),
tighten the nut 375 to 425 lbf·ft (508 to 576 N·m).
Do not overtorque.
tions exist, replace the damaged bracket(s). See
Group 32 of the L-Line and A-Line Workshop
Manual for instructions.
2. Check for distorted or frayed rubber at the beam
end bushings. If the bushings are damaged, replace them.
3. Check that the ends of the equalizer beam are
not lower in the beam hanger. If the equalizer
beam ends appear lower, use a jack to raise
each beam end, and check for movement of the
inner metal of the rubber end bushing. See
Fig. 5. Movement cannot be corrected by tightening the fastener, because parts could be damaged. If there is movement, replace the rubber
end bushings and all connecting parts. See
Group 32 of the L-Line and A-Line Workshop
Manual for instructions.
5
2
1
2
4
3
f320110a
05/27/93
1
NOTE: Do not use the three-piece adapter without the
intermediate tube.
1. Nut
2. Adapter
3. Intermediate Tube
2
4. Inner Metal of Beam
End Bushing
5. Beam Hanger
Fig. 6, Three-Piece Adapter-Type Beam End Connection
3
1. Beam Hanger
2. Equalizer Beam
4
f320039a
05/27/93
3. Jack
2
Fig. 5, Raising the Hendrickson Suspension Beam End
WARNING
1
Insufficient beam end fastener torque could cause
the beam to separate from the axle. This will
cause loss of vehicle control resulting in property
damage, serious personal injury or death.
2
05/27/93
4. After repairs to the suspension, check the fastener torque after the vehicle has been in service
for 2500 miles (4000 km). If equipped with the
adapter-type beam end connection (see Fig. 6
for the three-piece adapter-type beam end connection, or Fig. 7 for the two-piece adapter-type
beam end connection), tighten the nut 210 to
240 lbf·ft (285 to 325 N·m). If equipped with the
L-Line and A-Line Maintenance Manual, April 1999
1.
2.
3.
4.
3
f320317a
Nut
Adapter
Inner Metal of Beam End Bushing
Beam Hanger
Fig. 7, Two-Piece Adapter-Type Beam End Connection
32/3
32
Suspension
3
1
1
IMPORTANT: Before checking the AirLiner suspension height, make sure there is no load on
the chassis, and the trailer is unhitched.
1. Park the vehicle on a level surface, using a light
application of the brakes. Do not apply the parking brakes. Shift the transmission into neutral,
and build the secondary air pressure to at least
100 psi (690 kPa). Shut down the engine.
2
05/27/93
1. Nut
2. End Tube
f320111a
3. Beam Hanger
Fig. 8, Tube-Type Beam End Connection
5. Without detaching the radius rods, attempt to
move (by hand) each radius-rod end up, down,
in, and out. If there is any movement, replace the
radius rod. If a radius rod needs to be replaced,
see Group 32 of the L-Line and A-Line Workshop Manual for instructions.
2. Check that the air line support brackets are positioned so the air lines do not rub against anything. Reposition any configurations that could
contact and result in friction or wear. There must
be at least 1-inch (25-mm) clearance around the
rubber air spring when inflated. If clearance is
less than 1-inch (25-mm), relocate the obstructing parts.
3. Mark the location of the front and rear tires on
the floor, and chock the tires on one axle only.
4. Check the length of the overtravel lever between
its pivot points. See Fig. 9, Ref. A.
A
6. Inspect the rubber bushing ends. Replace the
radius rod for any of the following reasons:
• If there are gaps between the rubber bushing and the pin or outer steel sleeve.
4
1
• If either bushing end contacts a radius rod
pin mounting bolt.
3
• If there are cracks in the bushing.
• If part of the rubber bushing extends beyond the outer circumference of the outer
bushing sleeve.
AirLiner Suspension
WARNING
Do not replace individual leaves of a damaged leaf
spring assembly; replace the complete spring assembly. Visible damage (cracks or breaks) to one
leaf causes hidden damage to other leaves. Replacement of only the visibly damaged part(s) is
no assurance that the spring is safe. On front
spring assemblies, if cracks or breaks exist in the
two top leaves, a loss of vehicle control could
occur. Failure to replace a damaged spring assembly could cause an accident resulting in property
damage, serious personal injury, or death.
32/4
2
5
05/15/95
f320410
A. Measure the length of the overtravel lever between
these two points.
1. V-Shaped Mark
4. Cotter Pin
2. Adjustment Locknut
5. Linkage Rod
3. Overtravel Lever
Fig. 9, AirLiner Overtravel Lever and Linkage Rod
Measurement
4.1
If the vehicle is equipped with an
adjustable-mount leveling valve, the
length should be 8 inches (203 mm). If
the length is incorrect, see Group 32 of
the L-Line and A-Line Workshop Manual
for adjustment procedures.
4.2
If the vehicle is equipped with a fixedmount leveling valve, see Group 32 of
L-Line and A-Line Maintenance Manual, April 1999
32
Suspension
the L-Line and A-Line Workshop Manual
for the overtravel lever length for the rear
axle installed in your vehicle.
5. On single-drive rear axle configurations, measure
the distance from the bottom of the left axle stop
to the top of the U-bolt pad. On tandem (dualdrive) rear axle configurations, measure the distance from the bottom of the forwardmost left
axle stop to the top of the axle U-bolt pad. See
Fig. 10, Ref. A. The correct distance for single
and dual-drive rear axles is between 2-3/8 inches
and 2-7/8 inches (60 to 73 mm).
rod needs to be replaced, see Group 32 of the
L-Line and A-Line Workshop Manual for instructions.
8. Inspect the rubber bushings for cracks or cuts.
9. Check for any shifting of the barpin.
10. Inspect the weld seams between the control rod
tube and the shorter bushing tubes. If there are
cracks, replace the control rod. Do not weld the
control rod for any reason.
11. Raise the rear of the vehicle so the tires just
clear the ground and the suspension is fully extended. Place safety stands under the vehicle
frame.
12. Squeeze all air springs to check for complete
deflation. If any air springs remain partially or
fully inflated, see "Troubleshooting" in the appropriate section in Group 32 of the L-Line and
A-Line Workshop Manual.
1
13. Inspect each air spring for wear at its connection
to its pedestal. Replace any worn air springs; for
instructions, see Group 32 of the L-Line and
A-Line Workshop Manual.
A
14. Check the axle connection welds (beam-seat to
equalizing-beam and axle-adapter to axle) for
cracks. If welds are cracked, grind them out and
reweld the parts.
15. Move the axle up and down while checking for
signs of looseness due to worn parts at the front
pivot connections. Replace any worn parts by
following the procedures in Group 32 of the
L-Line and A-Line Workshop Manual.
08/16/96
f320453
A. Measure height here.
1. Left Forwardmost Axle Stop
Fig. 10, AirLiner Axle Stop Measurement
6. If the axle stop measurement is not correct, see
Group 32 of the L-Line and A-Line Workshop
Manual for adjustment procedures.
7. Without detaching the control rods, attempt to
move (by hand) each control-rod end up, down,
in, and out. If there is any movement, examine
the control rod for wear or damage. If a control
L-Line and A-Line Maintenance Manual, April 1999
16. Inspect the shock absorbers for oil leaks and
worn rubber bushings. Replace the shock absorbers and/or rubber bushings if wear or damage is noted. For instructions, see Group 32 of
the L-Line and A-Line Workshop Manual.
17. Remove the safety stands and lower the rear of
the vehicle to the ground. Run the engine until
air pressure of at least 100 psi (689 kPa) is
maintained throughout the system.
18. Check that all air springs are inflated. If the air
springs do not inflate, see Group 32 of the
L-Line and A-Line Workshop Manual for possible
causes and corrections.
19. Apply the parking brakes, and remove the
chocks.
32/5
32
Reyco Suspension, 79KB and 179
Park the vehicle on level ground and chock the front
tires to prevent the vehicle from moving. Place the
transmission in neutral, and release the parking
brakes.
1. Check that the torque rod clamps are directed
away from the spring to prevent possible interference during operation. See Fig. 11 for a Reyco
79KB, or Fig. 12 for a Reyco 179.
2. Check the fit of springs to hangers to ensure
good ride characteristics.
3. Check for elongated holes in the suspension
components. See Group 32 of the L-Line and
A-Line Workshop Manual for proper repair procedures.
4. Check bushing condition. Replace any bushing
that is worn, cracked, dry-rotted, or otherwise
damaged. See Group 32 of the L-Line and
A-Line Workshop Manual for bushing removal
and installation instructions.
5. Check tire condition. If abnormal wear is found,
check and replace all worn or damaged components, and check suspension alignment. See
Group 32 of the L-Line and A-Line Workshop
Manual for component removal and installation
procedures, and for suspension alignment
instructions.
6. Inspect all suspension fasteners for proper
torque values. See Group 00 of this manual for
proper bolt torque specifications.
Chalmers Walking Beam
Suspension, 800 Series
Chock the front tires to prevent the vehicle from moving. Place the transmission in neutral, and release
the parking brakes before inspecting the Chalmers
rear suspension.
Power wash the Chalmers rear suspension, or clean
it with a hard-bristle brush before performing a visual
inspection.
1. Visually inspect the rubber bushings for cracks or
other damage.
Try to move the torque rod ends using your
hands only, and check for any free-play. If freeplay is felt, replace the torque rod end bushing.
Do not use a pry bar to check for free-play. Use
32/6
Suspension
of a pry bar may lead to premature bushing replacement.
2. Lift the rear of the vehicle and support the frame
on jack stands to unload the suspension components. The vehicle is lifted high enough when the
beam ends are off of the saddles. All jack stands
must be of sufficient strength and rigidity to
safely support the vehicle. Do not perform any
work on or around a vehicle that is supported
solely by a lifting device.
Visually inspect the walking beam for cracks or
other damage. If damage is found, replace the
walking beam.
Keep the vehicle supported by the jack stands
for the next operation.
3. Manipulate the walking beam so that a micrometer, vernier, or dial caliper may be used to determine the wear area thickness on the bottom
face. See Fig. 13. Measurements should be
taken a minimum of 1/2 inch (13 mm) from the
beam flange edges to eliminate any edge wear
that may have occurred. Subtract the wear area
thickness (Fig. 13, Ref. B) from the thickness at
the non-wear area (Fig. 13, Ref. A) to determine
the amount of wear.
If the beams show any wear greater than 0.062
inch (1.5 mm), a Chalmers wear plate must be
installed, or the walking beam must be replaced.
4. Rotate the restrictor cans 360 degrees and visually inspect the cans for cracks, severe corrosion, and distortion. If any of these conditions are
present, or the restrictor can is missing, replace
the restrictor can.
WARNING
Replace all cracked or missing restrictor cans.
Failure to do so could lead to loss of vehicle control, which could result in property damage, serious personal injury, or death. Vehicles with
cracked or missing restrictor cans may be driven
slowly to the nearest workshop for restrictor can
replacement.
Hendrickson Walking Beam
Suspension, RS Series
1. Inspect the frame-hanger-to-frame attaching fasteners for the proper torque. See Group 00 of
this manual for torque specifications.
L-Line and A-Line Maintenance Manual, April 1999
32
Suspension
1
2
1
01/04/96
f320488
1. Torque Rod Clamp
2. Torque Rod
Fig. 11, Reyco 79KB Torque Rod Clamp Position
1
1
2
1
A
01/16/96
f320503
1. Torque Rod Clamp
B
2. Torque Rod
Fig. 12, Reyco 179 Torque Rod Clamp Position
WARNING
Be sure that fasteners are torqued correctly. Fasteners that do not provide a tightly clamped joint
between the frame and the hanger can cause premature fracture of the frame hanger, separation of
components, loss of vehicle control, and possible
personal injury or property damage.
L-Line and A-Line Maintenance Manual, April 1999
f320432
09/27/95
A. Non-Wear Area
1. Walking Beam
B. Wear Area
Fig. 13, Walking Beam End Wear Thickness
32/7
32
Suspension
2. Visually inspect each frame hanger for any evidence of cracks in the vertical mounting flange.
See Fig. 14.
2
1
1
f320420
09/15/95
09/15/95
f320419
1. Frame Rail
2. Crack In Inspection Area
Fig. 14, Hendrickson RS Series Vertical Mounting
Flange
1. Crack In Inspection Area
Fig. 15, Hendrickson RS Series Horizontal Mounting
Flange
saddles. See Group 00 of this manual for torque
specifications.
3. Visually inspect each frame hanger for evidence
of cracks in the horizontal mounting flange adjacent to the vertical drive pin area. See Fig. 15.
Hendrickson Suspension, RT2 and
RTE2 Series
4. Visually inspect each frame hanger for severe
rust on the horizontal mounting flange adjacent
to the vertical drive pin area. See Fig. 16.
1. Park the vehicle on a level surface, apply the
parking brakes, and chock the front tires.
5. Inspect the load cushions for cuts and swelling.
See Fig. 17. Cushions cut by the retaining lips of
the saddles or frame hangers indicate the cushions may not be the correct hardness or configuration for the vehicle operation.
6. Inspect the lower side of the vertical drive bushings for evidence of torn or shredded rubber.
Check that the concave washers are installed
with the lips pointing downward.
7. Inspect the saddles and saddle cap fasteners for
wear. The allowable thrust washer wear in aluminum saddles is up to 3/16 inch (4.8 mm) into the
saddles as measured at the top of the thrust
washer diameter. Check that the locknuts are
torqued to specification to prevent wear of the
beam center bushings into the legs of the
32/8
Raise the rear of the vehicle until the rear wheels
are suspended in the air, then support the vehicle with safety stands.
2. Check the torque of the number-one spring
hanger (double-lock-bolt design) lock bolt nuts. If
a loose connection has caused pin hole wear,
replace the hanger.
3. Inspect the pin hole in the outboard leg of the
number one spring hanger (draw-key design) for
wear or elongation.
WARNING
Wear at this point requires hanger replacement, or
premature fracture of the spring hanger pin may
occur, with possible separation of components
L-Line and A-Line Maintenance Manual, April 1999
32
Suspension
and loss of vehicle control. This could result in
serious personal injury or property damage.
1
4. Visually inspect the cam surface of the numbertwo spring hanger for wear due to operating
mileage. Also, inspect the outside legs for wear
which can be caused by worn spring eye bushings.
NOTE: RTE2 (extended-leaf-spring) suspensions require a minimum gap of 3/8 inch (9.5
mm) between the cam surface of the numbertwo spring hanger and the top of the main leaf
in the unloaded condition. See Fig. 18. If this
gap is less than 3/8 inch (9.5 mm), the
extended-leaf portion of the spring will not perform satisfactorily for an empty ride.
5. Inspect the cam surface on the number-three
spring hanger (extended-leaf-springs only) for
wear. Excessive wear will reduce the gap available at the number-two spring hanger. Refer to
the previous note.
09/15/95
f320421
1. Rust Inspection Area
4
1
Fig. 16, Hendrickson RS Series Rust Inspection
A
2
3
f320112a
05/27/93
A.
1.
2.
3.
4.
Minimum gap of 3/8 inch (9.5 mm).
Forward (no. 1) Spring Hanger
Spring Eye Pin
Rear (no. 2) Spring Hanger
Rear (no. 3) Extension
Fig. 18, RTE Suspension (Unloaded)
05/27/93
f320318a
Fig. 17, Hendrickson RS Series Load Cushion
Inspection
L-Line and A-Line Maintenance Manual, April 1999
6. Place a block of wood on the leaf spring. See
Fig. 19. Place a pry bar on the block of wood
and insert the end of the pry bar under the frame
hanger. Attempt to lift the frame hanger, as
shown in Fig. 19. Also, with an empty chassis
and the brakes applied, attempt to rock the chassis back and forth while observing the spring
eye. In either case, if 1/8 inch or more of move-
32/9
32
Suspension
ment is observed, the bushing and pin should be
replaced. This also could indicate that a broken
spring eye and spring are connected to the
spring hanger through the wrapper eye of the
second leaf. In this case, the main leaf or the
complete spring should be replaced immediately.
Check all other nuts and bolts for proper torque.
See Group 00 of this manual for torque specifications.
4. Check the air pressure gauge to confirm that
there is in excess of 65 psi (448 kPa) in the air
system, and inspect the air springs for sufficient
and equal firmness.
NOTE: Height control valves control all air
springs. Check for air leaks by applying a soapy
solution, then checking for bubbles, at all air
connections and fittings.
4
5. Check the riding height of the air suspension by
measuring the distance from the centerline of the
rear axle (see Fig. 20) to the bottom of the frame
rail. If the riding height is incorrect, adjust the air
suspension.
32–02 Suspension Lubricating
1
Front Suspension
2
08/16/96
1. Frame Bracket
2. Leaf Spring
3
3. Wood Block
4. Pry Bar
f320422
Fig. 19, Hendrickson RT2 and RTE2 Series Frame
Bracket Inspection
Neway Suspension
WARNING
Wipe all dirt away from the grease fittings (if
equipped) on the spring-eye bushings. Apply multipurpose chassis grease with a pressurized grease
gun until the old grease is forced out.
NOTE: Service Schedule IV vehicles equipped
with a 12,000 lb (5452 kg) front axle are fitted
with maintenance-free rubber bushings, and do
not require lubrication.
Rear Suspension
Inspect the components and check their operation
as described below. Failure to perform these inspections and checks could result in separation of
worn suspension components and loss of vehicle
control, possibly causing personal injury or death,
or property damage.
Sterling Spring
Single Axle
1. Park the vehicle on a level surface. Apply the
parking brakes and chock the tires to prevent the
vehicle from moving.
Tandem Axle
2. Inspect the rear suspension for any signs of
damage, loose components, wear, or cracks. Replace any damaged components to prevent failure or equipment breakdown.
No lubrication is required on Sterling single-axle rear
suspensions.
Lubricate the equalizer cap-and-tube assembly bushings by applying multipurpose chassis grease at the
grease fitting until the old grease is forced out from
the cap-and-tube assembly. See Fig. 21.
3. Inspect all bolts and nuts at the pivot and axle
connections to ensure they are properly torqued.
32/10
L-Line and A-Line Maintenance Manual, April 1999
32
Suspension
1
4
2
3
09/15/95
f320423
1. Frame Rail
2. Axle Housing
3. Axle Centerline
4. Suspension Ride Height
Fig. 20, Neway Ride Height Inspection
1. Park the vehicle on a level surface, apply the
parking brakes, and chock the front tires.
1
2. Raise the rear of the vehicle until the rear wheels
are suspended in the air, then support the vehicle with safety stands. This relieves the load on
the bushings and pins to allow the proper flow of
lubricant around them.
A
1
05/27/93
320020a
A. Lubricate here.
1. Cap-and-Tube Assembly Bushing
Fig. 21, Equalizer Assembly Lubrication
Hendrickson Spring Suspension,
RT2 and RTE2 Series
Lubricate the bronze, ball-indented bushings in the
spring eye, as follows:
L-Line and A-Line Maintenance Manual, April 1999
3. Using a multipurpose chassis grease, lubricate
the bronze, ball-indented bushings in the spring
eyes at the grease fitting. See Fig. 22. Continue
to lubricate until grease exits both ends of the
bushing. If the pin will not accept lubricant, remove the pin and clean the lubrication channels
where lubricant may have hardened. Remove the
safety stands and lower the vehicle after lubrication is complete.
Hendrickson Walking Beam, Series
RS
No lubrication is required on RS Series suspensions
equipped with rubber bushings.
If the equalizer beam has a bronze center bushing,
apply multipurpose grease at the beam grease fitting
32/11
32
Suspension
4
2
3
2. Check the U-bolt torque in a diagonal pattern.
Set a click-type torque wrench to the highest
torque value for the fastener being checked. Turn
the wrench in a clockwise motion until the torque
wrench clicks. See Table 1 of this manual for
U-bolt torque specifications.
3. Remove the chocks.
Spring Assembly U-Bolt High Nut Torque Values*
Size
5/8–18
Stage
Stage
Stage
Stage
1:
2:
3:
4:
Hand Tighten
60 (81)
200 (271)
180 to 230 (245 to 313)
3/4–16
Stage
Stage
Stage
Stage
1:
2:
3:
4:
Hand Tighten
60 (81)
200 (271)
270 to 330 (367 to 449)
7/8–14
Stage
Stage
Stage
Stage
1:
2:
3:
4:
Hand Tighten
60 (81)
200 (271)
420 to 500 (571 to 680)
1–14
Stage
Stage
Stage
Stage
1:
2:
3:
4:
Hand tighten
60 (81)
200 (271)
520 to 600 (707 to 816)
2
4
1
09/15/95
1. Bronze Bushing
2. Lubrication Hole
f320424
3. Grease Fitting
4. Lubrication Groove
Fig. 22, Hendrickson RT2 and RTE2 Series Bushing
Lubrication
on the equalizer beam center hub, until clean grease
appears at both ends of the grease seals.
Chalmers Walking Beam
No lubrication is required on the Chalmers rear
suspension.
Neway Suspension
Torque: lbf·ft (N·m)
* Tighten in a diagonal pattern as shown in Fig. 23.
Table 1, Spring Assembly U-Bolt High Nut Torque
Values
No lubrication is required on Neway rear suspensions.
4
1
2
3
Reyco Suspension
No lubrication is required on Reyco rear suspensions.
32–03 Suspension U-Bolt
Torque Checking
01/05/99
f320783
Fig. 23, Tightening Pattern for U-Bolt High Nuts
CAUTION
Failure to retorque the U-bolt nuts could result in
spring breakage and abnormal tire wear.
1. Park the vehicle on a flat surface and apply the
parking brakes. Chock the tires to prevent the
vehicle from moving.
32/12
L-Line and A-Line Maintenance Manual, April 1999
Front Axle
33
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
All-Axle Alignment Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–03
Knuckle Pin Lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–01
Tie Rod End Inspecting and Lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–02
L-Line and A-Line Maintenance Manual, June 2001
33
Front Axle
33–01 Knuckle Pin Lubricating
plate gasket, continue pumping until new grease is
seen at the bushing seal opposite the grease fitting.
See Fig. 2.
CAUTION
1
Use regulated pressure when lubricating the
knuckle assemblies, otherwise damage could result to the knuckle caps.
Dana Spicer
Park the vehicle on a level surface, apply the parking
brakes, and chock the wheels. When lubricating
upper and lower knuckle assemblies, do not raise the
front axle. Wipe the fittings clean. Apply multipurpose
chassis grease, (NLGI grade 1 [6% 12-hydroxy
lithium stearate grease] or NLGI grade 2 [8% 12hydroxy lithium stearate grease]), until new grease is
seen at the junctions of the axle beam and knuckles.
See Fig. 1. Knuckle pins without grease fittings are
permanently lubricated.
A
1
09/06/96
f320032a
A. Grease Exit
1. Grease Fitting
1
Fig. 2, Meritor Knuckle Pin Lubrication
A
33–02 Tie Rod End Inspecting
and Lubricating
Inspect the tie-rod ends as follows:
1. Shake the cross-tube. A loose fit, or movement
between the tapered shaft of the ball and the
cross-tube socket members indicates that the
tie-rod end assembly must be replaced.
1
11/21/95
f330129
A. Grease Exit
1. Grease Fitting
Fig. 1, Dana Spicer Knuckle Pin Lubrication
Meritor
When lubricating knuckle pin bushings, do not raise
the front axle. Wipe the lube fittings clean and apply
multipurpose chassis grease, (NLGI grade 1 [6% 12hydroxy lithium stearate grease] or NLGI grade 2
[8% 12-hydroxy lithium stearate grease]), until new
grease is seen at the bushing grease seal opposite
the fittings. The grease seal will accept grease pressure without damage, and is designed to have
grease pumped out through it during lubrication.
Even if grease leaks out around the top- or bottom-
L-Line and A-Line Maintenance Manual, June 2001
2. The threaded portion of the tie-rod end assembly
must be inserted all the way into the cross-tube
split for adequate clamping. See Fig. 3. Replace
the components if this cannot be done. For instructions, see Group 46 of the L-Line and
A-Line Workshop Manual.
3. For any Dana Spicer, Meritor, or Sterling axle
that requires lubrication of the tie-rod ends, wipe
the grease fittings clean. Pump multipurpose
chassis grease, (NLGI grade 1 [6% 12-hydroxy
lithium stearate grease] or NLGI grade 2 [8%
12-hydroxy lithium stearate grease]), into the tierod ends until all used grease is forced out and
fresh grease is seen at the ball stud neck.
33/1
33
Front Axle
support the combined weight of the cab, axle,
and frame. Place safety stands under the axle.
OK
3. Using spray paint or a piece of chalk, mark the
entire center rib of each front tire.
4. Place a scribe or pointed instrument against the
marked center rib of each tire, and turn the tires.
The scribe must be held firmly in place so that a
single straight line is scribed all the way around
each front tire.
1
5. Place a turn-plate or turntable under both front
tires. Raise the front of the vehicle, remove the
safety stands from under the axle, then lower the
vehicle. Remove the lock-pins from the gauges;
make sure the tires are exactly straight ahead.
OK
f320033a
02/27/2007
NOTE: Pinch bolt not shown to provide clarity.
1. Cross-Tube Split
Fig. 3, Tie-Rod End Adjustment
33–03 All-Axle Alignment
Checking
NOTE: If turn-plates or turntables are not available, lower the vehicle. Remove the chocks
from the rear tires and release the parking
brakes. Move the vehicle backward and then
forward about 6 feet (2 meters).
6. Place a trammel bar at the rear of the front tires;
locate the trammel pointers at spindle height,
and adjust the pointers to line up with the scribe
lines on the center ribs of the front tires. See
Fig. 4. Lock in place. Check that the scale is set
on zero.
A
Drive Axle Alignment
Check the axle alignment, parallelism, and thrust
angle measurements for the rear drive axles. Use the
applicable procedure and specifications in Group 35
of the L-Line and A-Line Workshop Manual.
Toe-In Inspection
For vehicle alignment to be accurate, the shop floor
must be level in every direction. The turn-plates for
the front wheels must rotate freely without friction,
and the alignment equipment must be calibrated
every three months by a qualified technician from the
equipment manufacturer. Sterling dealers must have
proof of this calibration history.
1. Apply the parking brakes and chock the rear
tires.
2. Raise the front of the vehicle until the tires clear
the ground. Check that the safety stands will
33/2
B
f330082a
08/29/94
NOTE: B minus A equals toe-in.
Fig. 4, Wheel Toe-In (overhead view)
7. Move the trammel bar to the front of the tires
(see Fig. 5), and adjust the scale end so that the
pointers line up with the scribe lines. See Fig. 6.
8. Read the toe-in from the scale, and compare it to
the toe-in specification in Group 33 of the L-Line
L-Line and A-Line Maintenance Manual, June 2001
33
Front Axle
f330014a
08/30/94
Fig. 5, Trammel Bar Positioning
f400100a
08/30/94
Fig. 6, Setting the Trammel Bar Pointers
and A-Line Workshop Manual. If corrections are
needed, see Group 33 of the L-Line and A-Line
Workshop Manual for instructions on adjusting
the toe-in.
L-Line and A-Line Maintenance Manual, June 2001
33/3
Rear Axle
35
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Axle Breather and Lubricant Level Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35–01
Axle Lubricant Changing, Oil Filter Replacing and Magnetic Strainer Cleaning . . . . . . . . . . . . . . . . . . . . . 35–02
L-Line and A-Line Maintenance Manual, August 2003
35
Rear Axle
35–01 Axle Breather and
Lubricant Level
Checking
temperature indicator only, and should not be
used as a fill or level hole.
3. With the vehicle on level ground, lubricant should
be level with the bottom of the fill hole. If low,
check for oil leaks, correct as needed, then add
specified lubricant. See Table 1 for recommended drive axle lubricants and Table 2 for
drive axle lubricant capacities.
Meritor Axle Lubricant Level
Check
4. Install and tighten the fill plug 35 lbf·ft (47 N·m).
CAUTION
Failure to keep the rear axle filled to the proper
level with the recommended lubricant can result in
rear axle damage.
1. With the vehicle parked on level ground, apply
the parking brakes, and chock the tires.
2. Clean the fill plug in the side of the axle carrier,
and the area surrounding it. See Fig. 1. Then
remove the plug.
NOTE: When adding to or checking the oil level
of non-drive axles, make certain the hub cap
and plug are cleaned before removal of the
plug; this will minimize the possibility of dirt and
road grime entering the assembly.
5. On non-drive axles using oil-lubricated wheel
bearings, check oil level at the wheels, and add
oil if low. Use the same lubricant as specified for
the drive axle.
Meritor Axle Breather Check
1
Axle housing breathers (see Fig. 1) must remain
clean. Whenever the axle lubricant level is checked,
check the axle breather to be sure it is open. Check
more often under adverse operating conditions. If the
breather is plugged, clean or replace it as needed.
Dana Spicer Axle
CAUTION
Failure to keep the rear axle filled to the proper
level with the recommended lubricant can result in
rear axle damage.
2
3
06/07/94
f350062a
1. Axle Housing Breathers
2. Carrier Oil Fill Plugs
3. Interaxle Differential
Fig. 1, Fill Plug and Axle Housing Breather Locations
NOTE: Some Meritor axles have a small tapped
and plugged hole near and below the housing
oil fill hole. This smaller hole is for a lubricant
L-Line and A-Line Maintenance Manual, August 2003
1. Park the vehicle on level ground, apply the parking brakes, and chock the tires.
2. If the vehicle has just been driven, allow a few
minutes for the lubricant to settle.
3. Clean the oil fill plug and area surrounding it,
then remove the plug from the fill hole (see
Fig. 2), or from the standpipe (if so equipped)
installed in the fill hole.
35/1
35
Rear Axle
Meritor Drive Axle Recommended Lubricant
Recommended
Lubricant Type
Hypoid Gear Oil API
Service Classification
GL–5
Ambient Temperature
Lubricant SAE
Viscosity Grade
Meritor Specification
+10°F (–12.2°C) and up*
85W–140
0–76–A
–15°F (–26.1°C) and up*
80W–140
0–76–B
–15°F (–26.1°C) and up*
80W–90
0–76–D
–40°F (–40°C) and up*
75W–90
0–76–E
–40°F (–40°C) to +35°F (+2°C)
75W
0–76–J
–40°F (–40°C) and up*
75W–140
0–76–L
–40°F (–40°C) and up*
75W–90
0–76–N
–40°F (–40°C) and up*
75W–140
0–76–M
Synthetic Gear Oil
* There is no upper limit on these ambient temperatures, but axle sump temperature must never exceed 250°F (121°C).
Table 1, Meritor Drive Axle Recommended Lubricant
Meritor Drive Axle Lubricant Capacities
Capacity*:
pints (liters)
Axle Model
1
Single-Drive, Single Reduction†
RS–21–160
39.5 (18.7)
RS–23–160
39.5 (18.7)
RS–23–161
37.2 (17.6)
RS–23–185
47.3 (22.4)
RS–25–160
37.2 (17.6)
2
Tandem-Drive, Single Reduction
RT–40–145, RT–40–145A,
RT–40–145P
RT–44–145, RT–44–145P
RT–46–160, RT–46–160P
Forward
30.2 (14.3)
Rear
25.8 (12.2)
Forward
29.3 (13.9)
05/27/93
Rear
25.1 (11.9)
1. Oil Fill Plug
Forward
39.1 (18.5)
Rear
34.4 (16.3)
* Quantities listed are approximate. Fill axle until lubricant is level with bot-
tom of fill hole with vehicle on level ground.
† See "Traction Equalizer Additives" in the text.
Table 2, Meritor Drive Axle Lubricant Capacities
f350018a
2. Drain Plug
Fig. 2, Axle Housing Drain and Fill Plugs
pipe opening. If low, check the axle for oil leaks,
and correct as needed. Add lubricant as required. See Table 3 for recommended drive axle
lubricants and Table 4 for recommended drive
axle lubricant capacities.
IMPORTANT: A lubricant level close enough to
be seen or touched is not sufficient. It must be
level with the bottom of the fill hole (see Fig. 3),
or the top of the standpipe opening.
4. Lubricant should be level with the bottom of the
fill hole (see Fig. 3), or with the top of the stand-
35/2
L-Line and A-Line Maintenance Manual, August 2003
35
Rear Axle
Dana Spicer Drive Axle Lubricant Capacities
A
Axle Type
Double
Reduction
Axle Model
Capacity*:
pints (liters)
DP451–P
34 (16.1)†
DP461–P
43 (20.3)†
* Quantities listed are approximate. Fill axle until lubricant is level with bottom of fill hole with vehicle on level ground.
B
† Add 2 pints (1 L) of additional lubricant to the power divider.
Table 4, Dana Spicer Drive Axle Lubricant Capacities
f350061a
06/07/94
A. Correct (lube level at bottom of fill hole)
B. Incorrect (lub level below fill hole)
Fig. 3, Axle Lubricant Level Inspection
Dana Spicer Drive Axle Recommended Lubricant
Lubricant Type
Condition
Eaton® Roadranger®
Synthetic Drive Axle
Lubricants, or
Equivalent with
Military Specification
MIL–L–2105D
Lubricant SAE
Viscosity
Grade
Over-the-Road
Service
75W–90
Off-Highway
Equipment, or
Under Extra
Heavy Loads
80W–140
Table 3, Dana Spicer Drive Axle Recommended
Lubricant
IMPORTANT: Axle housing breathers (see
Fig. 4) must remain clean and unclogged. Always check the axle breather whenever checking lubricant level. Ensure that it is open and
unclogged. Check the breather more frequently
under adverse operating conditions. If the
breather is plugged or damaged, clean or replace it as needed.
5. Install and tighten the fill plug 40 to 60 lbf·ft (54
to 81 N·m).
6. For a two-speed axle with a shift unit, check the
lubricant level of the shift unit; see elsewhere in
this maintenance operation for the shift unit lubricant level inspection procedure.
7. Remove the chocks from the tires.
Dana Spicer Drive Axle Lubricant Capacities
Axle Type
Axle Model
1
Capacity*:
pints (liters)
Single-Drive-Axle Installation
Single
Reduction
23080S, 23080D
40 (18.9)
23105S, 23105D
48 (22.7)
Dual-Drive-Axle Installation
Single
Reduction
Dual Range
(2-Speed)
DD404, DD404–P
31 (14.7)†
DS404, DS404–P
39 (18.5)†
DS461–P
43 (20.3)†
DT402, 402–P
34 (16.1)†
DT451–P
39 (18.5)†
DT461–P
43 (20.3)†
2
3
06/07/94
f350002a
1. Axle Housing Breather
2. Fill Plug
3. Temperature Indicator Plug
Fig. 4, Dana Spicer Axle Housing Breather
L-Line and A-Line Maintenance Manual, August 2003
35/3
35
Rear Axle
35–02 Axle Lubricant
Changing, Oil Filter
Replacing and Magnetic
Strainer Cleaning
• Elco No. 2 Friction Modifier (Elco Corporation)
Meritor Axle Lubricant Change
and Oil Filter Replacement
• Equa–Torque No. 2414 (Sta-Lube Corporation)
Axle Lubricant Change-Interval
Information
A regular schedule for changing axle lubricant in a
particular vehicle and operation can be accurately
determined by analysis of oil samples taken from the
assembly at specific intervals or mileages. The final
schedule recommended may, for economic reasons,
be correlated with lubricant changes governed by
climatic conditions and magnetic plug maintenance.
Lubricant changes should be made as climatic temperatures demand, regardless of vehicle mileage or
established change schedule.
Normal operating temperature of compounded lubricants during the summer season is approximately
160° to 220°F (71° to 104°C). Chemicals and additives that give these lubricants increased loadcarrying capacity, oxidize faster at temperatures
above 220°F (104°C), contributing to more rapid lubricant deterioration. For this reason, lubricants of
this type, that operate continuously at high temperatures, must be changed more frequently to realize
the inherent advantages they offer.
CAUTION
Failure to change the axle lubricant at more frequent intervals, when adverse operating conditions require, could result in axle damage.
Traction Equalizer Additives
Single drive axles equipped with traction equalizers
may require a "limited-slip friction modifier" to correct
a slip-stick condition. Meritor’s experience shows that
the following additives (friction modifiers) perform
adequately:
A. For all GL–5 gear oils (mineral oil or synthetic)
other than Mobil, add any of the following (1.6
ounces [35 mL] of additive for each pint [0.5 L] of
lube capacity):
35/4
• Lubrizol No. 6178 (Lubrizol Corporation)
• Hi–Tec E–336 (Edwin Cooper, Inc.)
• Equa–Torque No. 2411 (Sta-Lube Corporation)
B. For Mobilube HD (mineral oil) and Mobilube SHC
(synthetic) use Mobil No. 204 (Mobil Oil Corporation). Add 1.1 ounces [23 mL] of additive for
each pint [0.5 L] of lube capacity.
IMPORTANT: These friction modifiers generally
deteriorate faster than conventional extremepressure additives, so the lubricant change
schedule must be shortened when using these
additives. The traction equalizer additive (and
recommended drive axle lubricant) must be
changed at the Maintenance 2 (M2) interval,
instead of the Maintenance 3 (M3) interval as
recommended in the "Maintenance Operation
Sets Table," (see Group 00 in this manual), for
axles that require only those lubricants recommended in Table 1.
Axle Lubricant and Oil Filter
Replacement Procedure
1. With the vehicle parked on level ground, apply
the parking brakes, and chock the tires.
2. Remove the axle carrier fill plug (see Fig. 1),
then remove the drain plug at the bottom of the
housing and completely drain the lubricant while
the unit is warm. Allow sufficient time for all old
lubricant to drain. On tandem drive axles, it is
also necessary to remove the plug at the bottom
of the interaxle differential housing to drain the
lubricant.
3. If so equipped, replace the axle oil filter.
IMPORTANT: When the drive unit is
equipped with an oil filter, the filter should be
replaced every time the oil is changed.
3.1
To remove the filter from the helical gear
cover, remove only the two relief valve
cover stud nuts and washers, then lift off
L-Line and A-Line Maintenance Manual, August 2003
35
Rear Axle
the filter cover. Do not remove the capscrews. See Fig. 5.
05/27/93
f350118a
Fig. 7, Axle Oil Filter Adapter Removal and Installation
05/27/93
f350090a
3.4
Place the oil filter adapter in its bore. Install the washers and capscrews, then
tighten the capscrews 20 to 30 lbf·ft (27
to 41 N·m).
3.5
Using the specified drive axle lubricant,
coat the face of the gasket on a new oil
filter. Install the filter on the adapter.
Tighten the filter one full turn after the
gasket contacts the base; do not overtighten the filter.
3.6
Install the filter cover over the filter and
shouldered studs, and secure it with two
nuts and washers. Tighten the nuts 10 to
15 lbf·ft (14 to 20 N·m).
Fig. 5, Axle Oil Filter Cover Removal and Installation
3.2
Remove the oil filter, using a suitable filter
strap wrench. See Fig. 6. Discard the
filter.
4. For a new or reconditioned axle, flush the axle
with clean flushing oil, then drain it thoroughly. It
is necessary to flush the axle the first time (only)
that the axle lubricant is changed.
f350119a
05/27/93
Fig. 6, Axle Oil Filter Removal
NOTE: There may be about one pint (0.5 L)
of lubricant remaining in the filter. Be careful
not to spill it when removing the filter.
3.3
Remove the capscrews, washers, and oil
filter adapter from the gear cover; then
inspect the threads of the filter mounting
tube and adapter casting. See Fig. 7. If
the threads are stripped or the casting is
cracked, replace the damaged
component.
L-Line and A-Line Maintenance Manual, August 2003
IMPORTANT: Axles should not be flushed with
any solvent, such as kerosene.
5. Clean the fill and drain plugs. For magnetic
plugs, a piece of key stock or any other convenient steel slug may be used to short the two
magnetic poles and divert the magnetic field.
NOTE: Meritor recommends plugs with elements having a minimum pickup capacity of
1-1/2 pounds (0.7 kg) of low-carbon steel, in
plate or bar form. Magnets will rapidly lose effectiveness as collected material bridges the
gap between the two poles. Clean or change
the plugs before this occurs. It may be neces-
35/5
35
sary to clean or change the plugs one or more
times between lubrication change intervals.
6. After cleaning the drain plug(s), install and
tighten it 35 lbf·ft (47 N·m).
7. With the vehicle on a level surface, fill the axle
housings to the bottom of the fill hole, using
specified lubricant. See Table 1 for recommended axle lubricants and Table 2 for drive
axle lubricant capacities.
Rear Axle
pump on the front of the power divider cover,
that must be removed and cleaned at each axle
oil change. All rear axle assemblies are fitted
with magnetic drain and fill plugs. See Fig. 8.
5. Remove and clean the magnetic strainer, if so
equipped.
NOTE: Some Meritor axles have a small tapped
and plugged hole near and below the housing
lubricant fill hole. This smaller hole is for a lubricant temperature indicator only, and should not
be used as a fill or level hole.
8. Install and tighten the fill plug 35 lbf·ft (47 N·m).
9. Whenever the interaxle differential housing has
been drained, add an additional 2 pints (1 L) of
specified lubricant directly into the interaxle differential housing.
10. Remove the chocks, then drive the vehicle, unloaded, for 1 or 2 miles (2 or 3 km) at speeds
not to exceed 25 mph (40 km/h), to thoroughly
circulate lubricant throughout the carrier and
housing assemblies.
Dana Spicer
Dana Spicer does not recommend the use of friction
modifiers in any of their rear axle assemblies. Friction modifiers should be used in Dana Spicer rear
axles only if a slip-stick condition is found, as described in the vehicle driver’s manual.
1. Park the vehicle on level ground, apply the parking brakes, and chock the tires.
2. Clean the area around, and including, the fill
plug. Remove the plug from the oil fill hole (or
standpipe if installed in the oil fill hole) located in
the axle housing rear cover. See Fig. 2.
3. Place a drain pan under the rear axle drain plug.
Remove the drain plug at the bottom of the axle
housing and allow sufficient time for all old lubricant to run out. See Fig. 2.
4. On dual drive axles, also remove the plug at the
bottom of the power divider to drain oil from the
power divider.
NOTE: Some dual drive axles are equipped with
a cylindrical magnetic strainer, below the lube
35/6
2
1
05/27/93
f350017a
1. Magnetic Strainer
2. Power Divider
Fig. 8, Dana Spicer Dual-Drive-Axle Magnetic Strainer
5.1
Remove the magnetic strainer from the
power divider cover.
WARNING
Always wear eye protection when using compressed air to clean parts, as flying debris could
cause permanent damage to unprotected eyes. Do
not point the air stream in the direction of other
persons.
5.2
Wash the strainer in solvent, and blow it
dry with compressed air to remove oil and
metal particles.
5.3
Install and tighten the magnetic strainer
40 to 60 lbf·ft (54 to 81 N·m).
6. Clean the fill plugs and drain plugs. To help
clean magnetic plugs, a piece of key stock or
any other convenient steel slug may be used to
L-Line and A-Line Maintenance Manual, August 2003
35
Rear Axle
short the two magnetic poles and divert the magnetic field.
IMPORTANT: Magnets will rapidly lose effectiveness as collected material bridges the gap between the two poles. Clean or change the plugs
before this occurs. It may be necessary to clean
or change the plugs one or more times between
lubrication change intervals.
3
1
2
7. After cleaning, install and tighten the drain
plug(s) 40 to 60 lbf·ft (54 to 81 N·m).
8. Fill the axle with recommended lubricant. See
Table 3 for recommended drive axle lubricants,
and Table 4 for drive axle lubricant capacities.
NOTE: Some Dana Spicer axles have a
small tapped and plugged hole near and
below the housing oil fill hole. This smaller
hole is for a lubricant temperature indicator
only, and should not be used as a fill or level
hole.
8.1
Using recommended lubricant, fill the axle
through the oil fill hole or standpipe opening. Lubricant should be level with the
bottom of the oil fill hole (see Fig. 8) or
top of the standpipe opening.
8.2
Install and tighten the fill plug 40 to 60
lbf·ft (54 to 81 N·m).
8.3
For forward drive axles, remove the
power divider fill plug, located slightly offset to the right in the top portion of the
forward differential carrier. See Fig. 9.
Add two pints (1 L) of lubricant through
this fill hole. Do not use the hole at the
top of the differential carrier as a fill hole.
Install and tighten the fill plug 40 to 60
lbf·ft (54 to 81 N·m).
05/27/93
f350019a
1. Fill Plug
2. Power Divider
3. Forward Differential
Carrier
Fig. 9, Power Divider Fill Plug
Two-Speed-Axle Shift Unit
Lubricant Changing
Dana Spicer and Meritor Axles
1. Remove the shift unit housing cover. See
Fig. 10. Drain and discard the old lubricant. Discard the housing cover gasket.
1
9. For a two-speed axle with a shift unit, change
the shift unit lubricant; see elsewhere in this
maintenance operation for the shift unit lubricant
changing procedure.
3
2
08/06/93
f350021a
1. Housing Cover Gasket
2. Oil Fill Plug
3. Shift Unit Housing Cover
Fig. 10, Two-Speed-Axle Shift Unit
L-Line and A-Line Maintenance Manual, August 2003
35/7
35
Rear Axle
2. Thoroughly wash the axle shift parts and housing
cover, and allow them to air dry.
3. Install the housing cover and a new cover gasket. Tighten the housing cover capscrews 7.5 to
9.2 lbf·ft (10.2 to 12.5 N·m), then remove the oil
fill plug from the cover.
IMPORTANT: When the ambient temperature is
above 0°F (–18°C), use SAE 10 heavy-duty engine oil, API service classification SD (sulfated
ash content must not exceed 1.85 percent).
When the ambient temperature is below 0°F
(–18°C), use one part kerosene to three parts
SAE 10 heavy-duty engine oil, API service classification SD (sulfated ash content must not exceed 1.85 percent). This cold-weather mixture
can be safely used up to 32°F (0°C).
Commercially available automatic transmission
fluid may be used in place of SAE 10 engine oil.
Automatic transmission fluid can be used for all
temperatures; do not mix it with kerosene. To
prevent component damage, do not mix engine
oil and automatic transmission fluid.
4. Fill the shift unit housing through the oil fill hole
until specified lubricant is level with the bottom of
the opening.
5. Apply a small amount of Loctite® 242, or equivalent sealant, to the threads of the fill plug. Install
the plug finger-tight on the rear axle housing.
Use a wrench and tighten it an additional 1-1/2
turns.
35/8
L-Line and A-Line Maintenance Manual, August 2003
Wheels and Tires
40
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Wheel Nut and Rim Nut Checking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40–01
L-Line and A-Line Maintenance Manual, October 1999
40
Wheels and Tires
40–01 Wheel Nut and Rim Nut
Checking
IMPORTANT: In addition to the maintenance
interval in the General Information group, check
the wheel (or rim) nut torque the first 50 to 100
miles (80 to 160 km) of operation after a wheel
has been removed and installed.
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 sequence shown in Fig. 1.
When checking wheel nuts on a dual disc assembly,
remove one outer nut at a time, tighten the inner nut,
then reinstall the outer nut. Repeat this procedure for
all wheel nuts, using the sequence shown in Fig. 1.
See Table 1 for wheel nut torque specifications, and
see Fig. 1 for the wheel nut tightening sequence.
CAUTION
Insufficient wheel nut (rim nut) torque can cause
wheel shimmy, resulting in wheel damage, stud
Wheel Fastener Torque
Description
Nut Size
Wheel Manufacturer
Torque (dry threads): lbf·ft (N·m)
M22 x 1.5
All
450–500 (610–677)
Cadium or Zinc Rim Stud (Silver
Finish)
3/4–16
All
240–260 (324–352)
Phosphate and Oil (Black Finish)
3/4–16
All
170–220 (230–298)
10-Stud Disc Wheel with Two-Piece Flanged Nuts
Front and Rear Wheel Nut
Spoke Wheel Rim Nuts
Table 1, Wheel Fastener Torque
2
1
10
7
4
5
6
8
3
1
1
3
3
6
5
4
6
3
5
7
B
4
4
9
2
A
1
8
5
2
2
C
D
f400057
05/27/93
A. 8-Stud Disc Wheel
B. 10-Stud Disc Wheel
C. 6-Spoke Wheel
D. 5-Spoke Wheel
Fig. 1, Wheel Nut and Rim Nut Tightening Sequence
L-Line and A-Line Maintenance Manual, October 1999
40/1
Driveline
41
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Driveline Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41–01
Driveline Lubricating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41–02
L-Line and A-Line Maintenance Manual, October 1999
41
Driveline
41–01 Driveline Inspecting
Before lubricating driveline U-joints and slip joints,
proceed as follows:
CAUTION
Do not over-tighten bearing-cap capscrews or
yoke-strap capscrews. Due to the extreme load
occurring at high-speed rotation, a loose or broken capscrew at any point in the driveline will
weaken the driveline connection, which could
eventually result in serious vehicle damage.
1. For each full-round driveline yoke with threadlocking capscrews, tighten the bearing-cap capscrews.
For each half-round driveline yoke, tighten the
yoke-strap capscrews. See Fig. 1, Ref. 6.
Tighten all U-joint bearing cap fasteners to the
torque values given in Table 1.
Fastener Torque Values
Description
Size
Torque: lbf·ft (N·m)
Yoke-Strap Capscrew
1/2–20
130 (176)
5/16–24
24 (33)
3/8–24
37 (50)
7/16–20
60 (81)
Bearing-Cap Capscrew
Table 1, Fastener Torque Values
2. Check each input and output end yoke (see
Fig. 1) for cracks and looseness. Replace
cracked yokes.
If any end yoke can be moved in or out on its
shaft, or can be rocked on its shaft, disconnect
the driveshaft and U-joint from the end yoke.
Check the drive component’s shaft seal for leakage or other visible damage that may have been
caused by the loose yoke. Replace the seal if
needed, then tighten the end yoke nut. For
torque values, see Group 41 of the L-Line and
A-Line Workshop Manual. If the end yoke is still
loose after tightening the yoke nut, replace the
yoke and yoke nut.
Replace the prevailing torque locknut (end yoke
nut) if it was removed for end yoke replacement,
seal replacement, or any other reason.
L-Line and A-Line Maintenance Manual, October 1999
3. Check U-joint assemblies for wear by attempting
to move the driveshaft up and down, and from
side-to-side. If movement of the U-joint cross in
the bearings can be felt or seen, replace the
complete U-joint.
4. Check the midship bearing and mounting for
looseness and deterioration by attempting to
move the driveshaft up and down, and from sideto-side. If the bearing is loose on its shaft, or it
rattles, replace it. If the bearing mount is loose
on the frame, tighten the mounting bolt nuts to
the applicable torque value in the torque tables
in Group 00 of this manual. Replace the midship
bearing assembly if the rubber cushion is deteriorated or oil-soaked.
5. Check slip joints for spline wear by attempting to
bend the sleeve yoke and splined shaft back and
forth. See Fig. 2. If radial looseness is greater
than 0.007 inch (0.18 mm), replace both the
sleeve yoke and the splined shaft.
6. Visually examine the driveshaft tubes for dents,
bends, twists, or other damage. If any tube appears to be damaged, remove the driveshaft and
check the run-out on the tube. If the tube is not
straight (and cannot be straightened within 0.015
inch [0.38 mm] on the slip-joint-seal surface of
the splined shaft, 0.020 inch [0.51 mm] on the
tube 3 inches [76 mm] from the front and rear
welds, and 0.025 inch [0.635 mm] at the center
of the tube), replace the tube. See Fig. 3.
If the driveshaft tube requires straightening or
replacement, balance the repaired driveshaft before installing it.
7. Examine the driveshaft for evidence of missing
balance weights, and for build-up of foreign material. Remove any foreign material. If there is
any evidence that balance weights are missing,
remove the driveshaft and have it balanced.
8. For driveshafts with slip joints, check to be sure
the yoke plug is not loose or missing. See Fig. 4,
Ref. 2. Repair or replace the yoke plug as
needed. If the yoke plug is missing, the splined
shaft may be hitting the plug and knocking it out;
contact your Regional Service Office for assistance in determining the correct driveshaft
length.
41/1
41
Driveline
1
9
10
8
2
2
3
6
7
11
12
4
5
15
13
14
3
16
f410032a
05/27/93
NOTE: Not all fasteners are shown.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
Full-Round End Yoke
Bearing Cap
Lockplate and Capscrew
Main Transmission
Half-Round End Yoke
Yoke Strap and Capscrew
Slip Joint Assembly
Driveshaft Tube
Driveshaft Yoke (Full-Round)
Input Shaft End Yoke (Half-Round)
Splined Shaft
Slip Joint Seal Assembly
Sleeve Yoke (Full-Round)
Yoke Lug
U-Joint Cross
U-Joint Assembly
Fig. 1, Driveline Assembly
41–02 Driveline Lubricating
with the high-pressure gun, the U-joints may not
receive enough grease.
U-Joint Lubrication
Using lithium 12-hydroxy stearate grease (NLGI
grade 1 or grade 2, with EP additives), lubricate
until new grease can be seen at all four U-joint
seals.
1. Wipe all old grease and dirt from each U-joint
grease fitting. See Fig. 4, Ref. 8.
2. Use a hand-type grease gun, or a high-pressure
gun with a low-pressure adapter, to lubricate
U-joints. If a low-pressure adapter is not used
41/2
IMPORTANT: Fresh grease must be seen escaping from all four bearing-cap seals of each
U-joint. On full-round yokes, if most of the
grease being added to a U-joint can be seen
L-Line and A-Line Maintenance Manual, October 1999
41
Driveline
5
1
2
f410012a
05/27/93
7
3
4
3
6
Attempt to bend the sleeve yoke and splined shaft back
and forth.
8
Fig. 2, Slip Joint Spline Wear Checking
3
1
A
A
A
B
C
D
C
f410110b
06/13/96
A.
B.
C.
D.
Measurement:
Measurement:
Measurement:
Measurement:
10/20/93
3 inch (76 mm)
0.015 inch (0.38 mm)
0.020 inch (0.51 mm)
0.025 inch (0.635 mm)
Fig. 3, Driveshaft Runout Specifications
escaping from just one of the U-joint seals,
bend the tabs of the lockstrap (if equipped)
away from the heads of the bearing-cap capscrews. Check the torque on the capscrews at
that seal. Tighten the bearing-cap capscrews to
the torque values given in Table 1. If equipped,
bend the lockstrap tabs up, against a flat side of
each capscrew head. If the capscrews were already tight, or all of the U-joint seals still do not
purge, remove the bearing cap at that seal, and
examine the seal for damage. If the seal is
damaged, replace the complete U-joint.
If grease does not appear at one seal, use a
screwdriver to pry the U-joint trunnion away
from the non-purging seal, or tap the driveshaft
or yoke with a plastic or rawhide mallet on the
L-Line and A-Line Maintenance Manual, October 1999
f410050a
A. After grease appears, cover the pressure-relief hole
while continuing to lubricate.
1. Slip Joint Grease Fitting (with grease gun attached)
2. Yoke Plug
3. Grease
4. Half-Round Yoke
5. Yoke Plug Pressure-Relief Hole
6. Slip Joint Seal
7. Full-Round Yoke
8. U-Joint Grease Fitting
Fig. 4, Slip Joint and U-Joint Lubricating
side opposite the dry seal, while continuing to
lubricate. If grease still does not appear, bend
the tabs of the lockstrap away from the heads of
the bearing-cap capscrews, then loosen the
capscrews at the bearing with the dry seal, to
relieve seal tension. Lubricate the U-joint until
new grease is seen at the seal, then tighten the
capscrews to the above specifications, and
bend the tabs of the lockstrap against a flat side
of each capscrew head. If the bearing will not
take grease, replace the U-joint.
For U-joint replacement, follow the procedure in
Group 41 of the L-Line and A-Line Workshop
Manual.
41/3
41
Driveline
3. Check the purged grease. If it appears rusty,
gritty, or burned, replace the U-joint.
4. Wipe the purged grease from the seals, and any
excess grease from the grease fitting.
Slip Joint Spline Lubrication
1. Wipe all old grease and dirt from the slip joint
grease fitting. See Fig. 4, Ref. 1.
2. Use a hand-type grease gun or a high-pressure
gun with a low-pressure adapter, to lubricate the
slip joint. Add multipurpose chassis grease
(lithium 12-hydroxy stearate, NLGI grade 1 or
grade 2, with EP additives) until it appears at the
pressure-relief hole in the yoke plug. Then cover
the relief hole with your finger, while continuing
to apply gun pressure until new grease appears
at the slip joint seal. See Fig. 4. This ensures
complete lubrication of the splines.
3. Wipe the purged grease from the pressure-relief
hole and slip joint seal, and any excess grease
from the grease fitting.
41/4
L-Line and A-Line Maintenance Manual, October 1999
Brakes
42
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Automatic Slack Adjuster Lubricating and Checking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–02
Bendix Air Brake Valve Disassembly, Cleaning, Inspecting, and Lubricating
(DV–2 and Single Check Valve). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–07
Bendix Air Brake Valve Disassembly, Cleaning, and Inspecting (Double Check
Valve, E–12, MV–3, PP–7, QR–1, SR–1, ST–3, TC–7, TP–5, and TR–3). . . . . . . . . . . . . . . . . . . . . . . . . 42–06
Bendix Air Brake Valve Inspecting and Testing (MV–3 and TC–6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–08
Bendix Air Brake Valve Operation Checking (BP–R1 and E–12). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–05
Bendix Air Dryer Checking (AD–IP or AD–9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–03
Bendix Air Dryer Desiccant Replacing (AD–9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–04
Bendix Foot Brake Valve Actuator Lubricating and Leak Testing (E–12) . . . . . . . . . . . . . . . . . . . . . . . . . . 42–09
Brake Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–10
Camshaft Bracket Bushing Lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–01
L-Line and A-Line Maintenance Manual, January 2008
42
Brakes
42–01 Camshaft Bracket
Bushing Lubricating
IMPORTANT: Perform MOP 42–10 before lubricating the camshaft bracket.
Pump grease into the camshaft bracket until it appears at the slack adjuster end of the bracket. See
Fig. 1. Multipurpose chassis grease is recommended: NLGI Grade 1 (6% 12-hydroxy lithium
stearate grease) or NLGI Grade 2 (8% 12-hydroxy
lithium stearate grease). Be careful that no grease
enters the drum cavity. If grease leaks out under the
cam head, the camshaft grease seal is worn or damaged, or is installed backwards.
NOTE: Use of meter-type fittings, which have a
maximum 40 psi (275 kPa) pressure relief at
shutoff, is recommended.
Camshaft brackets without grease fittings are fitted
with special seals and packed with extendedlubrication-interval chassis grease. Grease them only
when the camshaft is disassembled for servicing.
1
42–02 Automatic Slack
Adjuster Lubricating and
Checking
WARNING
Manually adjusting an automatic slack adjuster to
bring the pushrod stroke within legal limits is
likely masking a mechanical problem. Adjustment
is not repairing. Before adjusting an automatic
slack adjuster, troubleshoot the foundation brake
system and inspect it for worn or damaged components. Improperly maintaining the vehicle braking system may lead to brake failure, resulting in
property damage, personal injury, or death.
IMPORTANT: Perform MOP 42–10 before lubricating the slack adjusters.
Gunite Automatic Slack Adjusters
1. Lubricate the slack adjuster until grease flows
from the grease relief opening. See Fig. 2. For
temperatures to –40°F (–40°C), use Lubriplate
Aero; for temperatures to –20°F (–29°C), use
Texaco Multifak EP–2 or Mobil Grease No. 77.
The newest Gunite slack adjusters are produced
without a grease relief. During lubrication with a
grease gun, lubricant is forced through the drilled
worm wheel onto the camshaft. Lubricate the
slack adjuster at the grease fitting until grease
appears on the camshaft.
3
2. Inspect the slack adjuster for structural damage.
Replace the slack adjuster if needed.
2
3. Inspect the slack adjuster boot for cuts or tears.
05/28/93
A.
1.
2.
3.
A
f420011a
Grease Exit
Brake Chamber
Slack Adjuster
Non-Pressure-Relief Grease Fitting
If the boot is damaged, replace it as follows. See
Fig. 2.
3.1
Remove the two clevis pins.
3.2
Rotate the worm shaft adjusting hexnut
counterclockwise to move the link away
from the clevis. About 45 lbf·ft (60 N·m) is
needed. You will hear a clicking sound.
Fig. 1, Camshaft Bracket Bushing Lubrication
Remove the old boot from the link.
3.3
L-Line and A-Line Maintenance Manual, January 2008
Install a new boot on the link, heavy section down. Be careful not to damage the
boot.
42/1
42
Brakes
WARNING
4
5
6
7
3
42–03 Bendix Air Dryer
Checking (AD–IP or
AD–9)
8
2
9
During cold weather, check the operation of the end
cover heater-and-thermostat assembly.
1. With the ignition on, check for voltage to the
heater-and-thermostat assembly. Unplug the
electrical connector at the air dryer, and place a
test lead on each pin of the male connector. If
there is no voltage, look for a blown fuse, broken
wires, or corrosion in the vehicle wiring harness.
Check that a good ground path exists.
1
10
f420653a
10/27/93
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Make sure both clevis pins are installed. Failure to
do so will cause the slack adjuster to work incorrectly, which could lead to loss of braking control.
This could result in an accident causing personal
injury or property damage.
7/16-Inch Adjusting Nut
Grease Fitting
Boot
Link
Brake Chamber Piston Rod
Clevis
1/2-Inch Clevis Pin
1/4-Inch Clevis Pin
Grease Relief Opening
Slack Adjuster Spline
Fig. 2, Gunite Automatic Slack Adjuster
3.4
Seat the boot so that the bottom of the
boot is in the boot insert, and the top is in
the groove of the link.
3.5
Rotate the adjusting hexnut clockwise
until the 1/4-inch hole in the clevis lines
up with the hole in the link.
2. Check thermostat and heater operation. Turn off
the ignition switch and cool the end cover assembly to below 40°F (4°C). Using an ohmmeter,
check resistance between the electrical pins in
the female connector. Resistance should be 1.5
to 3.0 ohms for the 12-volt heater, and 6.8 to 9.0
ohms for the 24-volt heater. Some early models
of the AD–9 will have resistance readings of 1.0
to 2.5 ohms for the 12-volt heater, and 4.8 to 7.2
ohms for the 24-volt heater. If resistance is
higher than this, replace the purge-valve housing
assembly, which includes the heater-andthermostat assembly.
3. Warm the end cover assembly to over 90°F
(32°C) and check resistance again. It should exceed 1000 ohms. If it does, the thermostat-andheater assembly is operating properly. If it
doesn’t, replace the purge-valve housing assembly, which includes the heater-and-thermostat
assembly.
Install the 1/4-inch clevis pin and the cotter pin.
3.6
Tap the clevis upward or downward until
the large hole in the slack adjuster lines
up with one in the clevis.
Install the 1/2-inch clevis pin and the cotter pin.
42/2
L-Line and A-Line Maintenance Manual, January 2008
42
Brakes
42–04 Bendix Air Dryer
Desiccant Replacing
(AD–9)
Disassemble, clean, and inspect the Bendix air dryer.
Replace the desiccant cartridge. See Group 42 of
the L-Line and A-Line Workshop Manual for instructions.
NOTE: Desiccant change intervals may vary
from vehicle to vehicle. Although typical desiccant cartridge life is three years, many will perform adequately for a longer period of time. To
take maximum advantage of desiccant life and
assure that replacement occurs only when necessary, it is important to perform the other maintenance operations in this group.
42–05 Bendix Air Brake Valve
Operation Checking
(BP–R1 and E–12)
Check for proper operation; see Group 42 of the
L-Line and A-Line Workshop Manual for instructions.
42–06 Bendix Air Brake Valve
Disassembly, Cleaning,
and Inspecting (Double
Check Valve, E–12,
MV–3, PP–7, QR–1,
SR–1, ST–3, TC–7, TP–5,
and TR–3)
NOTE: See Group 42 of the L-Line and A-Line
Workshop Manual for valve removal, disassembly, inspection, assembly, and leakage-checking
instructions.
Remove and disassemble the valves.
Clean the valve parts with mineral spirits, and inspect
the parts. Replace all rubber parts and any worn or
damaged parts; use only genuine Bendix replacement parts or kits.
L-Line and A-Line Maintenance Manual, January 2008
Assemble and install the valves, then check for
proper operation and for leakage.
42–07 Bendix Air Brake Valve
Disassembly, Cleaning,
Inspecting, and
Lubricating (DV–2 and
Single Check Valve)
NOTE: See Group 42 of the L-Line and A-Line
Workshop Manual for valve removal, disassembly, inspection, assembly, and leakage-checking
instructions.
Remove and disassemble the valves.
Clean the valve parts with mineral spirits, and inspect
the parts. Replace all rubber parts and any worn or
damaged parts; use only genuine Bendix replacement parts or kits.
For a DV–2 valve, lubricate the air reservoir automatic drain valve. If there is a filter screen in the
adaptor fitting, replace it with a new one.
Assemble and install the valves, then check for
proper operation and for leakage.
42–08 Bendix Air Brake Valve
Inspecting and Testing
(MV–3 and TC–6)
1. Clean the exterior of the valves, and check them
for corrosion and damage.
2. Inspect the air lines connected to the valves for
signs of wear or damage. Replace the lines as
needed.
3. Test the air line fittings for excessive leakage.
Tighten or replace the fittings as needed.
4. Check the valves for leakage. See Group 42 of
the L-Line and A-Line Workshop Manual for instructions.
For TC–6 valves, check for proper operation.
See Group 42 of the L-Line and A-Line Workshop Manual for instructions.
42/3
42
Brakes
42–09 Bendix Foot Brake Valve
Actuator Lubricating and
Leak Testing (E–12)
NOTE: You may need to remove tie straps and
an air line to gain access to the valve bore. It
should not be necessary to remove the adaptor
from the valve.
1. Remove the three mounting bolts that hold the
foot brake valve on the firewall.
2. From outside the cab, pull the valve away from
the firewall; then remove the brake valve mounting adaptor and plunger. See Group 42 of the
L-Line and A-Line Workshop Manual for instructions.
3. Thoroughly clean any grease and contaminants
from the brake valve mounting adaptor bore and
the plunger surface. See Fig. 3.
A
E-12 Brake Valve Service Parts List
Description
Gasket
Qty
1
Table 1, E-12 Foot Brake Valve Service Parts List
5. Apply one of the specified silicone greases to the
sliding surfaces of the plunger and the adaptor
bore; see Table 2. If installing a new adaptor or
plunger, first apply the grease included with the
kit.
Silicone Greases
Description
Manufacturer
Source
BW 291126 (silicone
base grease spec.
BW–650–M) 3.7 cc
packet*
Allied Signal
PDC
55 O-RIng Lubricant
(formerly Molykote
DC–55M Pneumatic
Grease)
Dow-Corning
Corporation
Locally
Rhone-Poulenc
Silicone VSI Inc.
Locally
V–755 O-Ring
Lubricant
B
Part Number
12–15695–000
* Each 3.7 cc packet is adequate to lubricate one foot valve adaptor assembly.
Table 2, Silicone Greases
6. Install the brake valve mounting adaptor and
plunger, using a new gasket.
1
06/17/94
42–10 Brake Inspection
f420363a
IMPORTANT: This procedure should be performed prior to lubrication of the brake components.
A. This end toward the foot brake valve.
B. This end toward the brake pedal piston rod.
1. Plunger
Fig. 3, Brake Plunger
Parking Brake Operational Check
4. Inspect the adaptor bore and the plunger sliding
surface for corrosion. The bore and plunger surfaces should be smooth, with no pitting or roughness. Some discoloration is permissible. If there
is pitting roughness, replace with new parts. See
Table 1.
E-12 Brake Valve Service Parts List
Part Number
Qty
Valve Adaptor
Description
BW 5002378
1
Plunger
BW 5002379
1
42/4
CAUTION
Perform the following check in a clear safe area. If
the parking brakes fail to hold the vehicle, personal injury or property damage may result.
1. With the engine running, and air pressure at cutout pressure, set the parking brake.
2. Put the vehicle in the lowest gear and gently attempt to move it forward. The vehicle should not
move. If the vehicle moves, the parking brakes
L-Line and A-Line Maintenance Manual, January 2008
42
Brakes
are not operating correctly and must be repaired
before the vehicle is returned to service. See
Group 42 of the L-Line and A-Line Workshop
Manual for repair procedures.
Brake Component Inspection
1. Park the vehicle on a level surface, set the parking brake, and chock the tires. Once the tires are
chocked, release the parking brake.
WARNING
Manually adjusting an automatic slack adjuster to
bring the pushrod stroke within legal limits is
likely masking a mechanical problem. Adjustment
is not repairing. Before adjusting an automatic
slack adjuster, troubleshoot the foundation brake
system and inspect it for worn or damaged components. Improperly maintaining the vehicle braking system may lead to brake failure, resulting in
property damage, personal injury, or death.
2. With the engine off, and 100 psi (689 kPa) of air
tank pressure, have an assistant apply and hold
an 80 to 90 psi (550 to 620 kPa) brake application.
3. Check to see if the colored over-stroke band on
each brake chamber pushrod is exposed.
If a band shows, the stroke is too long. Check
the foundation brake components for wear or
damage, and repair as needed. See Group 42 of
the L-Line and A-Line Workshop Manual for inspection, troubleshooting, and repair procedures.
4. Measure the applied chamber stroke. See
Table 3 for the proper stroke for the type of
chamber being used. If the stroke is too short,
the brakes may drag or will not fully apply. Check
for improper operation or adjustment of the automatic slack adjuster. See Group 42 of the L-Line
and A-Line Workshop Manual for inspection and
troubleshooting procedures.
5. Start the engine and build air pressure to at least
100 psi (689 kPa). Shut down the engine.
6. Check all of the foundation brake components for
damage, wear, and loose or missing parts. Repair as needed. See Group 42 of the L-Line and
A-Line Workshop Manual for repair procedures.
Brake Chamber Stroke Specifications
Chamber
Manufacturer
Type*
Size†
9
12
Max Applied Stroke: inch (mm)
1-3/8 (35)
16
Standard Stroke
20
1-3/4 (44)
24
Gunite
30
2 (51)
36‡
2-1/4 (57)
16
20
Long Stroke
2 (51)
24 (2-1/2 inch rated
stroke)
24 (3 inch rated
stroke)
2-1/2 (64)
30
L-Line and A-Line Maintenance Manual, January 2008
42/5
42
Brakes
Brake Chamber Stroke Specifications
Chamber
Manufacturer
Type*
Max Applied Stroke: inch (mm)
Size†
12
Standard Stroke
Haldex
1-3/8 (35)
16
20
1-3/4 (44)
24
2-1/2-Inch Extended Stroke
24
2 (51)
3-Inch Extended Stroke
24
2-1/2 (64)
Standard Stroke
30
2 (51)
Long Stroke
30
2-1/2 (64)
9
Less than 1-1/2 (38)
12
Standard Stroke
16
Less than 1-3/4 (44)
20
Meritor
24
Long Stroke
24
Standard Stroke
30
Less than 1-7/8 (48)
Less than 2 (51)
16L
20L
Dana Spicer
Long Stroke
2 (51)
24L
24LS
2-1/2 (64)
30LS
* Long stroke design is indicated by a tag, or embossing, on the brake chamber.
† Specifications are relative to a brake application with 80 to 90 psi (550 to 620 kPa) air pressure in the brake chambers.
‡ If type 36 chamber is used, slack length should be less than 6 inches.
Table 3, Brake Chamber Stroke Specifications
42/6
L-Line and A-Line Maintenance Manual, January 2008
Steering
46
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Drag Link and Power Steering Cylinder Lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46–02
Power Steering Reservoir Fluid Level Checking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46–03
Power Steering Reservoir Fluid and Filter Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46–04
Steering Driveline Lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46–01
TRW Power Steering Gear Lubricating, TAS Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46–05
L-Line and A-Line Maintenance Manual, July 2004
46
Steering
46–01 Steering Driveline
Lubricating
Wipe the steering driveline grease fittings clean. See
Fig. 1, Fig. 2, and Fig. 3. Using a pressure gun,
apply multipurpose chassis grease sparingly to the
universal joints and slip-joint splines.
2
06/28/99
f460006b
Fig. 2, Intermediate Shaft U-Joint Grease Fitting
1
05/28/93
f460005a
1. U-Joint Grease Fitting
2. Steering Column End Yoke Pinch Bolt and Nut
Fig. 1, Steering Driveline Upper Universal Joint
46–02 Drag Link and Power
Steering Cylinder
Lubricating
f460007b
06/28/99
Fig. 3, Slip-Joint Grease Fitting
1. Using a clean rag, wipe all dirt from both drag
link grease fittings and, if so equipped, both
power steering cylinder grease fittings. See
Fig. 4, Fig. 5, and Fig. 6.
2. Using a pressure gun, apply clean grease at the
grease fittings until old grease is forced out of
the socket. Use multipurpose chassis grease
NLGI grade 2 (8% 12-hydroxy lithium stearate
grease) or NLGI grade 1 (6% 12-hydroxy lithium
stearate grease). Grade 2 is preferred.
L-Line and A-Line Maintenance Manual, July 2004
06/28/99
f460009b
Fig. 4, Drag Link Grease Fitting (pitman arm end)
46/1
46
Steering
46–03 Power Steering
Reservoir Fluid Level
Checking
Metal Ventra Reservoir
1. Turn off the engine, apply the parking brakes,
and chock the tires.
2. Open the hood.
3. Clean around the power steering reservoir fill cap
with a clean rag, then remove the dipstick.
WARNING
06/28/99
f460010b
Fig. 5, Drag Link Grease Fitting (axle steering arm end)
Fill only with approved clean fluid. Do not mix
fluid types. Any mixture or any unapproved fluid
could lead to seal deterioration and leaks. Fluid
leakage could cause loss of power steering assist,
possibly resulting in personal injury and property
damage.
4. With the power steering fluid at operating temperature, check the fluid level on the dipstick. If
below the ADD mark, add enough fluid to bring
the level up to the FULL mark on the dipstick.
Use Dexron® III automatic transmission fluid
(ATF) in the power steering reservoir.
5. Install the fill cap on the power steering reservoir.
6. Close the hood, and remove the chocks from the
tires.
Nelson Reservoir
NOTE: If the power steering reservoir in the vehicle looks like the reservoir shown in Fig. 7,
use the following procedure.
06/28/99
f460048a
Fig. 6, Power Steering Cylinder Grease Fitting (axle
steering arm end)
1. Turn off the engine, apply the parking brakes,
and chock the tires.
2. Open the hood.
3. With the engine cool, the level should be between MIN COLD and MAX HOT lines with the
engine off. Add or remove fluid as necessary to
bring the fluid level to the line between the MIN
COLD and MAX HOT lines. Use only Dexron® III
automatic transmission fluid.
4. With the engine hot, the fluid level should be at
the MAX HOT line with the engine off. Add or
46/2
L-Line and A-Line Maintenance Manual, July 2004
46
Steering
4. Disconnect the hose, between the reservoir and
the steering gear, from the reservoir. Then drain
the reservoir in a drain pan, and cap the reservoir port.
1
6
3
5. Remove the filter element.
2
6. Thoroughly clean the reservoir with a lint-free
cloth.
4
7. Install a new filter element, and position the
spring on top of the filter element.
5
8. Fill the reservoir with Dexron® III automatic transmission fluid.
07/09/98
1. Fill Cap
2. Filter Spring
3. Filter Top Plate
f461670
4. Clamp
5. Filter
6. Reservoir Cover
Fig. 7, Nelson Power Steering Reservoir and Filter
remove fluid as necessary to bring the fluid level
to the MAX HOT line. Use only Dexron® III automatic transmission fluid.
5. Close the hood, and remove the chocks from the
tires.
46–04 Power Steering
Reservoir Fluid and
Filter Changing
Metal Ventra Reservoir
WARNING
Fill only with approved clean fluid. Failure to use
the proper fluid could cause seal deterioration and
leaks. Fluid leaks could eventually cause loss of
power steering assist. This could lead to an accident resulting in personal injury or property damage. Wear eye protection when changing the fluid
and filter.
1. Turn off the engine, apply the parking brakes,
and chock the tires.
2. Open the hood.
3. Remove the band clamp and cover from the
power steering reservoir.
L-Line and A-Line Maintenance Manual, July 2004
WARNING
Fill only with approved clean fluid. Do not mix
fluid types. Any mixture or any unapproved fluid
could lead to seal deterioration and leaks. Fluid
leakage could cause loss of power steering assist,
possibly resulting in personal injury and property
damage.
9. Place the end of the hose in the drain pan. Do
not start the engine while draining the system. Raise the front of the vehicle with a floor
jack and support it with jack stands. Have someone turn the steering wheel to full lock left and
right, and capture the fluid flowing from the hose
in the drain pan. Add fluid to the reservoir, as
needed. Continue turning the steering wheel until
clean power steering fluid flows from the hose.
10. Remove the plug from the reservoir and connect
the hose to the reservoir. Tighten the hose fitting
nut finger-tight. Then with a wrench, tighten until
there is firm resistance. Tighten one-sixth turn
more. Do not overtighten.
Remove the jack stands and lower the vehicle.
11. Fill the reservoir with ATF as needed. Start the
engine and let it idle. Have someone turn the
steering wheel from lock to lock until no bubbles
are seen in the reservoir. Turn off the engine.
12. Install a new cover gasket, the cover, and the
band clamp. Install the fill cap.
13. Start the engine and check the power steering
reservoir fluid level. If the fluid level is low, add
ATF to bring the level up to the FULL mark on
the dipstick.
14. Close the hood, and remove the chocks from the
tires.
46/3
46
Steering
Nelson Reservoir
WARNING
Fill only with approved clean fluid. Failure to use
the proper fluid could cause seal deterioration and
leaks. Fluid leaks could eventually cause loss of
power steering assist. This could lead to an accident resulting in personal injury or property damage. Wear eye protection when changing the fluid
and filter.
NOTE: If the power steering reservoir in the vehicle looks like the reservoir shown in Fig. 7,
use the following procedure.
1. Turn off the engine, apply the parking brakes,
and chock the tires.
2. Open the hood.
3. Place a drain pan under the reservoir, and remove the steering gear-to-reservoir return hose
at the reservoir. Drain the steering fluid into the
drain pan and dispose of the fluid properly. Plug
the return line fitting on the reservoir.
4. Loosen the clamp and remove the cover along
with the filter spring and the filter top plate. See
Fig. 7.
NOTE: Always replace the reservoir filter when
changing the fluid.
5. Remove the filter. It may be necessary to wiggle
the filter to remove it from its base. Do not use
pliers to aid in removal of the filter; pliers could
cause metal chips to enter the steering system.
Clean the inside of the reservoir using a lint-free
cloth.
IMPORTANT: Do not start the engine while
draining the system.
6. Place the disconnected end of the steering gearto-reservoir hose in a drain pan. Raise the front
of the vehicle with a floor jack and support it with
jack stands. Have someone turn the steering
wheel to full lock left and right. Capture the fluid
flowing from the hose in a drain pan. Add fluid to
the reservoir as needed. When clean fluid flows
from the hose into the drain pan, remove the
plug from the reservoir and reconnect the steering gear-to-reservoir hose to the reservoir. Remove the jack stands and lower the vehicle.
46/4
7. With the larger opening at the top, install a new
filter in the reservoir.
8. Clean the reservoir cover and gasket. Inspect the
O-ring and the cover for cracks, deformities, or
damage. Replace the gasket seal or cover as
needed.
9. Install the reservoir cover along with the spring
and the top plate. Make sure the center of the
top plate fits into the opening at the top of the
filter.
10. Place the clamp over the flanges of the cover
and shell assembly, then tighten the clamp 25 to
30 lbf·ft (35 to 40 N·m).
11. Fill the reservoir with Dexron® III automatic transmission fluid to the FULL COLD mark.
12. Start the engine and operate it at idle. Turn the
steering wheel to full lock left and right to adjust
the fluid level and remove any existing air from
the power steering pump and gear. Check the
fluid level again. Add fluid as needed. The system is properly bled when the steering pump
does not labor when turning the wheel.
13. Check for leaks in the power steering system
and repair as needed. Fill the reservoir as
needed.
14. Turn off the engine, close the hood, and remove
the chocks from the tires.
46–05 TRW Power Steering
Gear Lubricating, TAS
Series
1. Wipe off debris from the grease fitting.
2. Using a hand-type grease gun, apply multipurpose chassis grease until grease starts coming
out of the sector shaft dirt-and-water seal.
L-Line and A-Line Maintenance Manual, July 2004
Fuel
47
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Fuel Separator Sight Bowl Cleaning and Element Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47–03
Fuel Tank Band Nut Tightening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47–02
Fuel Tank Vent Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47–01
L-Line and A-Line Maintenance Manual, October 1999
47
Fuel
47–01 Fuel Tank Vent Checking
1
2
On vehicles with a screw-on fuel cap, remove the
fuel cap and clean it with solvent. Make sure the fuel
cap vent is open. Install the cap.
3
On vehicles with a quarter-turn fuel cap, check to be
sure the vent line at the inboard side of the fuel tank
is clean and not plugged.
47–02 Fuel Tank Band Nut
Tightening
3
Hold each fuel tank band retention nut with a wrench
while backing off its jam nut. Then tighten the retention nuts 30 to 45 lbf·ft (41 to 60 N·m). After the retention nuts have been tightened, hold each with a
wrench while tightening its jam nut 50 to 65 lbf·ft (68
to 88 N·m). Do not overtighten.
4
5
6
47–03 Fuel Separator Sight
Bowl Cleaning and
Element Replacing
ConMet Fuel Separator Sight
Bowl Cleaning
7
8
The only maintenance necessary on ConMet fuel
separators is to clean the sight bowl, if equipped.
See Fig. 1.
9
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, possibly resulting in personal injury or property damage. When working on a fuel system, have a fire
extinguisher within easy reach.
1. Drain the fuel separator.
2. Unscrew the sight bowl from the fuel separator.
3. Wipe the sight bowl clean, using a soft cloth.
4. Lubricate the gasket with a film of oil, and reinstall it on the sight bowl. If the gasket appears
dry-rotted or damaged, replace the gasket.
L-Line and A-Line Maintenance Manual, October 1999
10
f470146
08/25/95
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Vacuum Breaker/Drain Valve
Reducer Bushing
Mounting Brackets
O-Ring (when equipped with heater)
Stainless Steel V-Clamp (when equipped with
heater)
Heater Assembly
Gasket
Sight Bowl Heater Rod
Sight Bowl Assembly
Vacuum Breaker/Drain Valve
Fig. 1, ConMet Fuel Separator
47/1
47
Fuel
5. Lightly lubricate the threads on the sight bowl,
with oil, then thread the sight bowl into the bottom of the fuel separator.
1
6. Hand-tighten until the gasket is in full contact
with the fuel separator, then tighten an additional
1/4 to 1/3 turn.
1
2
12
7. Check that the drain valve is tightened and
closed.
8. Prime the fuel separator.
8.1
Remove the vacuum breaker fitting and
fill the unit with diesel fuel.
8.2
Install and close the vacuum breaker fitting when the unit is full of fuel.
IMPORTANT: The fitting must be air-tight
and the valve closed.
9
3
10
10
11
3
9
1
2
Racor Fuel Separator Element
Replacement
The only service necessary on Racor fuel separators
is to replace the filter element.
4
Racor 325R and 330R
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, possibly resulting in personal injury or property damage. When working on a fuel system, have a fire
extinguisher within easy reach.
5
6
1. Disconnect the water sensor probe connector, if
equipped. See Fig. 2.
2. Place a suitable container under the fuel
heater/water separator, then drain the fuel from
the fuel heater/water separator by opening the
drain valve.
3. Remove the filter element and collection bowl
together, by turning the filter element off of the
mounting head.
4. Remove the filter element from the collection
bowl by turning the collection bowl; then discard
the filter element.
47/2
8
7
f470194
05/28/97
1.
2.
3.
4.
5.
6.
7.
Mounting Hole
Mounting Head
Heater Connector
Filter Element
Collection Bowl
Water Sensor
Water Sensor
Connector
8. Drain Valve
9. Vacuum Switch
Connector
10. Vacuum Switch
11. Fuel Outlet
12. Fuel Inlet
Fig. 2, Racor 325R Fuel Heater/Water Separator (330R
Similar)
L-Line and A-Line Maintenance Manual, October 1999
47
Fuel
5. Remove and discard the bowl O-ring; then clean
the bowl of debris using diesel fuel only. Clean
the bowl O-ring seat with a shop cloth.
1
2
6. Lubricate the new bowl O-ring with clean diesel
fuel or motor oil; then seat it in the collection
bowl.
3
3
7. Attach the collection bowl to a new filter element,
hand-tight. Do not use tools.
8. Lubricate the new filter element square-cut gasket with clean diesel fuel or motor oil.
4
4
9. Fill the filter and bowl assembly with clean diesel
fuel.
5
5
1
6
10. Spin the filter and bowl assembly onto the
mounting head until the gasket contacts the head
base; then turn it an additional 1/3 to 3/4 of a
turn.
6
2
11. Connect the water sensor probe connector if
equipped.
4
4
12. Start the engine and check for fuel leaks. Repair
all fuel leaks with the engine off.
7
Racor 460R
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, possibly resulting in personal injury or property damage. When working on a fuel system, have a fire
extinguisher within easy reach.
1. Disconnect the water sensor probe connector, if
equipped. See Fig. 3.
2. Disconnect the bowl heater connector, if
equipped.
3. Place a suitable container under the fuel
heater/water separator, then loosen the vent plug
and drain the fuel from the fuel heater/water
separator by opening the drain valve.
8
9
11
10
05/28/97
1.
2.
3.
4.
5.
6.
Mounting Head
Vent Plug
Fuel Outlet
Fuel Inlet
Fuel Priming Pump
Mounting Hole
f470261
7.
8.
9.
10.
11.
Filter Element
Collection Bowl
Water Sensor Probe
Fuel Heater Wire
Drain Valve
Fig. 3, Racor 460R Fuel Heater/Water Separator
4. Remove the filter element and collection bowl
together, by turning the filter element off of the
mounting head.
6. Remove and discard the bowl O-ring. Clean the
bowl of debris using diesel fuel only. Clean the
bowl O-ring seat with a shop cloth.
5. Remove the filter element from the collection
bowl by turning the collection bowl. Discard the
filter element.
7. Lubricate the new bowl O-ring with clean diesel
fuel or motor oil. Seat it into the contaminant
bowl.
L-Line and A-Line Maintenance Manual, October 1999
47/3
47
Fuel
8. Hand-tighten the collection bowl to a new filter
element. Do not use tools.
2
9. Lubricate the new filter element square-cut gasket with clean diesel fuel or motor oil.
3
1
10. Spin the filter and bowl assembly onto the
mounting head until the gasket contacts the head
base. Turn it an additional 1/3 to 3/4 turn.
4
11. Connect the water sensor probe connector, if
equipped.
11
12. Connect the bowl heater connector, if equipped.
13. Loosen the vent plug, then operate the primer
pump until the fuel purges at the vent plug.
Close the vent plug.
5
10
14. Start the engine and check for fuel leaks. Repair
all fuel leaks with the engine off.
9
6
Racor 490R
7
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, possibly resulting in personal injury or property damage. When working on a fuel system, have a fire
extinguisher within easy reach.
1. Drain some fuel by loosening the vent plug and
opening the drain valve. See Fig. 4.
8
06/25/97
1.
2.
3.
4.
5.
4. Remove the bowl from the element, and clean
the O-ring.
5. Apply a coating of clean fuel or motor oil to the
new O-ring and element seal.
6. By hand only, spin the bowl onto the new element, then snugly spin them both onto the filter
head.
IMPORTANT: Do not use tools to tighten.
7. Connect the water sensor and heater connectors, if equipped.
7. Water Sensor Probe
8. Heater Connector
9. Bowl Drain Valve
Assembly
10. Bowl with Drain and
Water Sensor
11. Service Element
Fig. 4, Racor 490R Fuel Separator
8.1
Loosen the vent plug. Operate the primer
pump until the fuel purges at the vent
plug.
8.2
Close the vent plug.
2. Disconnect the water sensor and heater connections, if equipped.
3. Remove the element and bowl, together, by turning counterclockwise.
f470147
Mounting Head
Fuel Primer Pump
Metal Vent Plug
Bowl O-Ring
Bowl Bevel-Cut
Gasket
6. Bowl Probe Plug
9. Start the engine and check for fuel leaks.
10. Shut down the engine and correct any fuel leaks.
Racor 690R and 6120R
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, possibly resulting in personal injury or property dam-
8. Prime the fuel separator.
47/4
L-Line and A-Line Maintenance Manual, October 1999
47
Fuel
age. When working on a fuel system, have a fire
extinguisher within easy reach.
1. Drain some fuel by loosening the vent plug and
opening the drain valve. See Fig. 5.
6. By hand only, spin the bowl onto the new element, then snugly spin them both onto the filter
head.
IMPORTANT: Do not use tools to tighten.
7. Connect the water sensor and heater connectors, if equipped.
1
2
8. Prime the fuel separator.
8.1
Remove the 3/8-inch metal plug located
at the top of the fuel/water separator (see
Fig. 5, Ref. 2), and manually fill the unit
with diesel fuel.
8.2
Replace and tighten the 3/8-inch metal
plug when the unit is full.
3
9. Start the engine and check for fuel leaks.
10
10. Shut down the engine and correct any fuel leaks.
Racor 900FG and 1000FG
WARNING
9
4
8
5
6
7
f470148
09/15/95
1. Mounting Head
2. Metal Plug, 3/8-inch
NPT
3. Bowl O-Ring
4. Bowl Bevel-Cut
Gasket
5. Bowl Probe Plug
6. Water Sensor Probe
7. Heater Connector
8. Bowl Drain Valve
Assembly
9. Bowl with Drain and
Water Sensor
10. Service Element
Fig. 5, Racor 690R Fuel/Water Separator (6120R
similar)
2. Disconnect the water sensor and heater connections, if equipped.
3. Remove the element and bowl, together, by turning counterclockwise.
4. Remove the bowl from the element, and clean
the O-ring.
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, possibly resulting in personal injury or property damage. When working on a fuel system, have a fire
extinguisher within easy reach.
1. Remove the lid by turning the T-handle. See
Fig. 6.
2. Remove the filter element by raising the handle
built into the filter element. Carefully turn the filter
element while lifting up.
3. Remove and discard the lid gasket. Replace it
with a new one.
4. Lubricate the lid gasket with clean diesel fuel.
Seat it into the lid.
5. Fill the unit with clean diesel fuel.
6. Replace the lid. Hand-tighten it or tighten it to 10
lbf·ft (14 N·m).
7. Start the engine and check for fuel leaks. Repair
all fuel leaks with the engine off.
5. Apply a coating of clean fuel or motor oil to the
new O-ring and element seal.
L-Line and A-Line Maintenance Manual, October 1999
47/5
47
Fuel
1. Disconnect the water sensor probe connector
and bowl heater connector, if equipped. See
Fig. 7.
1
2
3
12
4
1
2
11
3
4
5
10
f470183
05/28/97
1. T-Handle
2. Lid
3. Lid Gasket
4. Filter Element
9
Fig. 6, Racor 900FG Fuel Heater/Water Separator
(1000FG similar)
Racor 6400
8
7
f470190
06/26/97
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, possibly resulting in personal injury or property damage. When working on a fuel system, have a fire
extinguisher within easy reach.
47/6
6
1.
2.
3.
4.
5.
6.
Fuel Inlet
Head Assembly
Filter Top Seal
Filter Element
Bowl O-Ring Seal
Water Sensor Probe
Plug
7. Water Sensor Probe
8. Bowl Heater
Connector
9. Drain Valve
10. Contaminant
Collection Bowl
11. Fuel Outlet
12. Priming Plug
Fig. 7, Racor 6400 Fuel Heater/Water Separator
2. Place a suitable container under the fuel
heater/water separator, then drain the fuel from
L-Line and A-Line Maintenance Manual, October 1999
47
Fuel
the fuel heater/water separator by opening the
drain valve.
1
3. Remove the filter element and collection bowl
together, by turning the filter element off of the
mounting head.
4. Remove the filter element from the collection
bowl by turning the collection bowl. Discard the
filter element.
2
5. Remove and discard the bowl O-ring. Clean the
bowl of debris using diesel fuel only. Clean the
bowl O-ring seat with a shop cloth.
6. Lubricate the new bowl O-ring with clean diesel
fuel or motor oil. Seat it into the collection bowl.
3
4
7. Hand-tighten the collection bowl onto a new filter
element. Do not use tools.
8. Lubricate the new filter element gasket with
clean diesel fuel or motor oil.
9. Spin the filter and bowl assembly onto the
mounting head until the gasket contacts the head
base. Turn it an additional 1/3 to 3/4 turn.
10. Connect the water sensor probe connector and
bowl heater connector, if equipped.
11. Remove the priming plug located at the top of
the fuel/water separator and manually fill the
fuel/water separator with clean diesel fuel. Replace and tighten the priming plug.
12. Start the engine and check for fuel and coolant
leaks. Repair all leaks with the engine off.
Davco Fuel Heater/Water
Separator Filter Element
Replacement
Davco 321
The only maintenance necessary on Davco 321 fuel
separators is to replace the filter element. See
Fig. 8.
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, possibly resulting in personal injury or property dam-
L-Line and A-Line Maintenance Manual, October 1999
5
6
f470276
02/07/97
1. Filter Vent
2. Filter Element
3. Filter Stud Seal
4. Filter Stud
5. Davco Unit Body
6. Fuel Port
Fig. 8, Davco 321
age. When working on a fuel system, have a fire
extinguisher within easy reach.
1. Place a suitable container under the fuel
heater/water separator. Open the filter vent using
a 1-1/8 inch wrench. Drain the fuel from the fuel
heater/water separator by opening the drain
valve.
2. Close the drain valve.
3. Remove the filter element by spinning the filter
element off of the fuel heater/water separator
body.
4. Remove the filter stud seal. Clean the top of the
unit body.
5. Add fuel to the fuel heater/water separator housing until it reaches the top of the fuel port.
6. Install a new filter stud seal.
7. Coat the filter gasket with clean oil. Spin the filter
element onto the unit housing until it contacts the
gasket. Turn it an additional 1/2 to 3/4 turn. Do
not use a filter wrench to tighten the filter.
47/7
47
Fuel
8. Start the engine, then raise the rpm for one to
two minutes to purge air from the system, and
check for fuel leaks.
9. Shut down the engine and correct any fuel leaks.
Davco 380
The only maintenance necessary on Davco 380 fuel
separators is to replace the filter element. See
Fig. 9.
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, possibly resulting in personal injury or property damage. When working on a fuel system, have a fire
extinguisher within easy reach.
NOTE: As an emergency option, the Davco 380
will accept a spin-on-type filter onto its threaded
filter stud with the grommet removed.
1
2
4
3
1. Place a suitable container under the fuel
heater/water separator. Open the filter vent.
Drain the fuel below the collar level by opening
the drain valve. Close the drain valve.
5
6
2. Remove the filter collar, using the Davco filter
collar wrench. See Fig. 10.
8
7
9
10
02/07/97
f470277
Fig. 10, Davco Filter Collar Wrench (Davco P/N 380134)
3. Remove the filter cover. Retain the filter cover
seal for re-use.
11
4. Remove the filter element. Remove the grommet
from the element. Discard the element. Retain
the grommet for re-use.
12
02/06/97
1.
2.
3.
4.
5.
6.
7.
Filter
Filter
Filter
Filter
Filter
Filter
Filter
f470275
Vent
Vent Seal
Spring
Element
Cover
Collar
Cover Seal
8. Grommet
9. Threaded Filter Stud
(for emergency use)
10. Fuel Port
11. Davco Unit Body
12. Drain Valve
Fig. 9, Davco 380
47/8
5. Add fuel to the fuel heater/water separator housing until it reaches the top of the fuel port.
6. Install the grommet on the new filter element.
CAUTION
Do not use the filter collar wrench to tighten the
filter collar. Using the filter wrench to tighten the
collar can damage the collar, resulting in a fuel
leak.
L-Line and A-Line Maintenance Manual, October 1999
Fuel
47
7. Install the filter element, filter cover and cover
seal, and filter collar. Hand-tighten the filter collar.
8. Remove the filter vent. Fill with fuel until fuel is
about one inch above the collar. Replace the filter vent.
9. Start the engine, then raise the rpm for one
minute to purge air from the system, and check
for fuel leaks.
10. Shut down the engine and correct any fuel leaks.
L-Line and A-Line Maintenance Manual, October 1999
47/9
Exhaust
49
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Exhaust System Inspecting (Noise Emission Control). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49–01
L-Line and A-Line Maintenance Manual, January 2007
49
Exhaust
49–01 Exhaust System
Inspecting (Noise
Emission Control)
1
In addition to inspecting the exhaust system at the
scheduled maintenance interval, inspect the exhaust
system if the noise level of the vehicle has increased. Replace parts that show leakage, wear, or
damage, with genuine Sterling parts.
2
5
Pre-EPA07 Exhaust System
Inspecting
6
3
1. Check the condition of the muffler body, top
stack or top stack silencer, and muffler wrap. See
Fig. 1. Check the inlet/outlet tubes for leakage,
dents, and corrosion, and check for holes in the
muffler. Replace parts as required. Use new
parts, equivalent to parts originally installed on
the vehicle. See Group 49 of the L-Line and
A-Line Workshop Manual for replacement
procedures.
4. If leakage exists, tighten the nut on the V-band
coupling 15 lbf·ft (20 N·m). If leakage persists,
install a new V-band coupling.
5. Inspect the turbo outlet pipe, and replace it as
needed.
6. Check the U-bolt clamps for tightness, and
tighten as needed.
7. Check for leakage at all wide-band exhaust
clamps.
If leakage exists, tighten the nuts on Donaldson
seal clamp exhaust clamps (see Fig. 3) or Riker
Tru-Seal exhaust clamps (see Fig. 4) 50 to 75
lbf·ft (68 to 102 N·m). Tighten Torca Torctite exhaust clamps (see Fig. 5) 35 to 45 lbf·ft (47 to
61 N·m). If leakage persists, install a new wideband exhaust clamp. Do not re-use seal clamps.
L-Line and A-Line Maintenance Manual, January 2007
6
3
8
2. Inspect the exhaust flex hose (see Fig. 2) for
leakage, wear, or damage. Replace with new
parts if replacement is needed.
3. Check for leakage at the V-band coupling, which
attaches the exhaust pipe to the turbocharger
exhaust outlet. See Fig. 2.
4
7
4
9
f490006a
05/28/93
1.
2.
3.
4.
Fiberglass Pad
Top Cover
Installation Band
Long Bolt, Washers,
and Nut
5.
6.
7.
8.
9.
Seam Clip
Seam Strips
Protective Paper
Muffler Wrap Body
Fiberglass Mat
Fig. 1, Muffler Wrap Assembly
EPA07 Exhaust System
Inspecting
IMPORTANT: The Environmental Protection
Agency’s 2007 regulations require lower exhaust emissions, thus requiring new exhaust
system components. See Fig. 6. In particular
the after-treatment device (ATD), which is part
of the after-treatment system (ATS), requires
special attention during regularly scheduled
maintenance inspections. If any discrepancies
are discovered, refer to the engine manufacturer’s service literature for repair instructions.
49/1
49
Exhaust
2
1
3
4
06/01/93
1.
2.
3.
4.
f490024a
Flex Hose
V-Band Coupling
Exhaust Pipe
Turbocharger Exhaust Outlet
05/28/93
f490023a
Fig. 4, Riker Tru-Seal Wide-Band Exhaust Clamp
Fig. 2, V-Band Coupling and Flex Hose
f490005a
10/05/94
Fig. 5, Torca Torctite Wide-Band Exhaust Clamp
05/28/93
f490025a
Fig. 3, Donaldson Seal Clamp Wide-Band Exhaust
Clamp
• Diesel Oxidation Catalyst (DOC)—oxidizes hydrocarbons and reduces NOx.
• Sensors—detect temperatures and pressures in
the ATS.
Definitions of ATS Components
Inspection
Refer to the following list of definitions of ATS components.
1. Check for leakage at the clamp that attaches the
exhaust pipe to the turbocharger exhaust outlet.
If leakage exists, tighten the nut on the clamp to
the required torque. If leakage persists, install a
new clamp.
• After-Treatment System (ATS)—the entire exhaust system from the turbocharger to the exhaust stack or tail pipe.
• After-Treatment Device (ATD)—a muffler-like
canister that houses a DPF, DOC, and sensors.
• Diesel Particulate Filter (DPF)—a filter that collects and holds particulate matter (soot and
ash).
49/2
2. Check the exhaust pipe, bellows, and each exhaust seal clamp for leakage, wear, cracks, or
damage. Replace damaged components as
needed. If leakage exists at a clamp, tighten the
nuts to the required torque. If leakage persists,
install a new exhaust seal clamp. Do not reuse
L-Line and A-Line Maintenance Manual, January 2007
49
Exhaust
seal clamps. Once a seal clamp is loosened or
removed, it must be replaced.
8. Check for heat discoloration on the surface of
the ATD. Heat discoloration may indicate internal
damage; especially around the DPF.
3. If present, check the condition of the insulation
material around the exhaust pipe between the
turbocharger and the ATD.
9. Check any wires, lines, or hoses within 4 inches
(10 cm) of the exhaust system for heat damage.
Repair or reroute as needed.
4. Check the ATD mounting bands for tightness.
Tighten to 30 lbf·ft (41 N·m) if needed. Do not
overtighten.
5. Check for leaks around the clamps that attach
the ATD in the ATS, and around the clamps that
retain the DPF in the ATD. No leaks are allowed
anywhere in the system.
6. Check all sensors attached to the ATD for leaks
or damaged wires. No leaks are allowed.
7. Check the DPF exterior surface for dents or
other damage. See Item A of Fig. 6. A dent over
3 inches (76 mm) in diameter and 1/4-inch (6mm) deep could cause internal damage to the
DPF, causing it to malfunction.
6
5
1
2
3
4
2
7
5
8
9
3
A
10/20/2006
A.
1.
2.
3.
4.
5.
Inspect this area of the canister for dents.
Marmon Fitting at Inlet from Turbocharger
DOC Temperature Sensor
ATD Mounting Band
DPF Intake Pressure Sensor
DPF V-Band Mounting Clamps
6.
7.
8.
9.
f490283
Sensor Housing
DPF Outlet Temperature Sensor
Exhaust Outlet Marmon Fitting
DPF Outlet Pressure Sensor
Fig. 6, Typical After-Treatment Device
L-Line and A-Line Maintenance Manual, January 2007
49/3
Electrical, Instruments, and Controls
54
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Electrical System Checking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54–01
L-Line and A-Line Maintenance Manual, October 1999
Electrical, Instruments, and Controls
54
54–01 Electrical System
Checking
Cab Interior
Inspect the wiring and electrical connections at the
electrical mounting plate, cab-to-chassis interface
connectors, cab-to-engine interface connectors, main
cab-power and cab-ground studs, and electrical junction blocks.
Check all wiring for chafing, kinks, and discolored
insulation. Find the cause of any problems, then repair, replace, or reroute wires as needed.
Check that all relays are firmly seated in their mounting plates.
Check the tightness of the connections on the electrical junction block(s), main cab-power stud, and cabground stud, as equipped.
Install all of the removed panels.
Chassis
1. Check the main chassis wiring harness. Check
the wiring insulation for damage from chafing or
heat. Also check for kinks. Reroute, repair, or
replace wires as needed.
CAUTION
Do not use flat-strip aluminum tie straps for holding electrical wiring. The sharp edges on these tie
straps may cause breaks in the wire insulation,
allowing the aluminum tie strap to make contact
with the wire. This could cause a short circuit and
damage to the wiring.
2. Check all tie straps for breakage and damage.
Replace any broken or cracked tie straps.
3. Check the wires of all sensors on or near the
engine. Make sure no wires are closer than 6
inches (15 cm) to hot surfaces. If any are, and
can not be rerouted, make sure they are protected by heat shields. Check that sensor connectors are tight, clean, and undamaged.
4. On engines with electronic controls, check the
wiring and connectors on the computer units.
L-Line and A-Line Maintenance Manual, October 1999
54/1
Doors
72
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Door Latch and Door Hinge Lubricating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72–01
L-Line and A-Line Maintenance Manual, October 1999
Doors
72
72–01 Door Latch and Door
Hinge Lubricating
Apply a few drops of light engine oil to the door latch
mechanism to reduce noise and wear. Wipe off excess oil. This includes baggage doors, ventilator
doors, and the oil-check door.
Lubricate door hinges every six months. In addition,
lubricate new door hinges at installation. Lubricate
the hinges by spraying them with a light coating of
silicone lubricant such as WD–40® or an equivalent.
L-Line and A-Line Maintenance Manual, October 1999
72/1
Heater and Air Conditioner
83
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Air Conditioner Inspecting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83–01
Air Filter Replacing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83–02
L-Line and A-Line Maintenance Manual, January 2008
83
Heater and Air Conditioner
83–01 Air Conditioner
Inspecting
WARNING
Wear eye protection, gloves, and protective clothing when working on the air conditioning system.
Leaking refrigerant from a damaged hose or line
could cause blindness or serious skin burns.
Preliminary Checks
1. Park the vehicle on a level surface, apply the
parking brakes, and chock the tires.
2. Check the appearance of the air conditioner
compressor pulley assembly. If the friction surface of the pulley shows signs of excessive
grooving due to belt slippage, replace both the
pulley and the drive plate. Visually inspect the
refrigerant compressor drive belt for damage,
and check that the belt is set at the proper tension. Also check the tightness of the compressor
mounting fasteners. For instructions and torque
values, see Group 01 of the L-Line and A-Line
Workshop Manual.
f830641
08/25/94
Fig. 1, Drive Plate Clearance Inspection
6. Check the overall condition of the air conditioning
hoses. Look for cracks, cuts, and abrasions on
the hoses. Replace damaged hoses, see Group
83 of the L-Line and A-Line Workshop Manual
for replacement instructions. Also, check for
loose fittings on all air conditioning components.
7. Check for a buildup of road debris on the condenser fins. See Group 83 of the L-Line and
A-Line Workshop Manual for cleaning instructions.
3. Inspect the drive plate. If the friction surface of
the drive plate shows visible signs of damage
due to excessive heat, replace the drive plate
and pulley assembly. See Group 83 of the
L-Line and A-Line Workshop Manual for removal
and installation procedures.
83–02 Air Filter Replacing
4. On a Sanden refrigerant compressor, use a
feeler gauge to check that the drive plate clutch
clearance is 0.016 to 0.03 inch (0.4 to 0.8 mm).
See Fig. 1. If the drive plate clutch requires adjustment, see Group 83 of the L-Line and A-Line
Workshop Manual.
IMPORTANT: When replacing the air filter, use
only a Sterling-approved air filter.
On a Climate Control refrigerant compressor,
place a feeler gauge between the air conditioner
compressor clutch and the pulley to check the
compressor clutch clearance. Drive plate to pulley clearance is 0.02 to 0.03 inch (0.6 to 0.8
mm). If the clearance is not correct, see Group
83 of the L-Line and A-Line Workshop Manual.
5. Inspect the compressor clutch coil wire. Check
that the connector is not damaged or loose. Replace the wire if it is damaged.
The air filter must be replaced every six months, regardless of mileage, to permit proper operation of the
HVAC system.
1. Turn off the engine, apply the parking brakes,
and chock the tires.
2. Open the hood.
3. Remove the screws that attach the filter cover to
the filter housing. See Fig. 2.
IMPORTANT: Do not operate the vehicle with
the filter removed. Dust and debris could enter
the blower motor and cause damage.
4. Remove the filter from the housing.
5. Install a new filter in the housing.
6. Using screws, attach the filter cover to the housing.
7. Close the hood.
L-Line and A-Line Maintenance Manual, January 2008
83/1
83
Heater and Air Conditioner
8. Remove the chocks from the tires.
1
1
2
f831564
02/17/2003
1. Screw
2. Filter Cover
Fig. 2, Air Filter Replacement
83/2
L-Line and A-Line Maintenance Manual, January 2008
Hood
88
Index, Alphabetical
Title of Maintenance Operation (MOP)
MOP Number
Hood Hinge Bushings Lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88–01
L-Line and A-Line Maintenance Manual, October 1999
Hood
88
88–01 Hood Hinge Bushings
Lubricating
Lubricate the hood hinge bushings at the zerk fittings, using multi-purpose chassis grease. Use a
hand-type grease gun, or a high-pressure gun with a
low-pressure adapter.
L-Line and A-Line Maintenance Manual, October 1999
88/1
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