07-11-14
8G000003, Rev. AC
STEEL HOPPER BOTTOM
GRAIN TRAILER
OPERATOR’S MANUAL
READ complete manual CAREFULLY
BEFORE attempting operation.
Maurer Manufacturing • 1300 38th Ave. West • P.O. Box 160 • Spencer, IA 51301
PH: (712) 262-2992 • FAX: (712) 262-1022 • www.maurermfg.com
CONGRATULATIONS and THANK YOU for purchasing a Maurer Grain Trailer.
Table of Contents
Introduction ........................................................................................................................... 2
General Information ............................................................................................................. 2
Product Disclaimer ............................................................................................................... 3
Trailer Information ................................................................................................................ 4
Safety, Signal Words ............................................................................................................ 5
Equipment Safety Guidelines ............................................................................................... 5
Safety Sign Locations ........................................................................................................... 6
Safety Sign Care .................................................................................................................. 6
Safety Sign Application ......................................................................................................... 6
Load Distribution Safety ....................................................................................................... 7
Tire and Lug Nut Safety ....................................................................................................... 7
Bolt Torque Standards .......................................................................................................... 8
Torque Requirements ........................................................................................................... 9
Trailer Towing Guide ........................................................................................................... 10
Trailer Towing Safety Guidelines ......................................................................................... 10
Operation Safety .............................................................................................................. 11-12
Service and Maintenance Safety ......................................................................................... 12
Coupling the Trailer to Tow Vehicle .................................................................................. 12-14
Uncoupling the Trailer from the Tow Vehicle ....................................................................... 15
Mounting the Side Discharge Chute .................................................................................... 16
Bolt-On 2-Speed Hopper Assembly Break Down ................................................................ 17
Spring Brake Control Valve - Troubleshooting ................................................................. 18-20
Braking with ABS ................................................................................................................. 21
Easy-Stop ABS Guide ...................................................................................................... 22-24
Landing Gear .....................................................................................................................25-29
Spring Suspension Information ...........................................................................................30-41
Air Ride Suspension Information ........................................................................................21-61
Lubrication Guide ............................................................................................................... 62-63
Wiring .................................................................................................................................. 64
Cleaning the Trailer .............................................................................................................. 64
Visual Inspection ................................................................................................................. 64
Limited General Warranty ..................................................................................................65-66
Notes ................................................................................................................................... 67
Warranty Registration (cutout) ............................................................................................. 69
INTRODUCTION
At Maurer Mfg. we strive to design, produce and deliver the highest quality trailer on the market. Our
employees have a strong background of knowledge and combined experience in manufacturing to
put quality workmanship into our products.
In this manual you will find information covering all models of the Maurer Mfg. Grain Trailer line. Use
the table of contents to locate specific areas of interest.
GENERAL INFORMATION
Maurer Mfg. requires that you and anyone else who will be operating and maintaining the trailer read and
understand the guidelines in the manual for safe, efficient, and trouble free operations. Proper maintenance, adjustments and use will result in many years of service. Keep this manual handy for frequent
reference and to pass on to new operators or owners. If assistance, information, or additional copies of
the manual are needed, contact the nearest dealer, a distributor, or Maurer Mfg.
PLEASE NOTE:
All documents within the manual referring to products not manufactured by Maurer Manufacturing
have been printed with the permission of the manufacturer specified.
Page 2
PLEASE NOTE
All references to driver, passenger, front and rear of the trailer are determined from a position behind the
trailer and facing forward.
Front
Driver
Passenger
Rear
PRODUCT DISCLAIMER
In this document you will find information based on available knowledge at the time of its publication.
To be accurate with the information, every effort was made but may not cover all details or variations
of a trailer or provide every possibility in connection with its production, operation and maintenance. A
Feature and Option may be presented in the manual that is not relevant to this trailer. Maurer
Manufacturing assumes no obligation of notice, to holders of this document, with changes made to a
product.
SPECIFICATIONS AND DESIGN ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Maurer Manufacturing is often making improvements and developing new designs. In doing so, we
reserve the right to make changes and/or improvements without obligation for equipment sold
beforehand. Self-modification to our trailers may affect the operation, function, and safety, so this is
not advised. If a replacement part is necessary, Maurer Manufacturing should supply it, please contact
your nearest dealer or Maurer Manufacturing.
LAKES ENTERPRISES INC. DBA MAURER MANUFACTURING STATEMENT OF PRODUCT
SAFETY
As a producer of agricultural and transportation equipment, Maurer Manufacturing is fully aware of its
responsibility of providing its customers products that perform their expected use, in a truly safe manner.
Safety considerations shall be a fundamental and high precedence part of all engineering/design
analysis and judgments involving Maurer Manufacturing products. It is our stated policy that our
products will be manufactured to coincide with the safety standards specified by the National
Association of Trailer Manufacturers and/or any other officially recognized standards at the time
manufactured. However, this statement should not be translated to mean that our product will uphold
against a customer’s own carelessness or disregard for common safety practices specified in each
product’s manual, nor will we be accountable for any such occurrence.
Page 3
TRAILER INFORMATION
GAWR (Gross Axle Weight Rating): The maximum gross weight that an axle can support. It is the
lowest of axle, wheel, or tire rating. Usually the tire or wheel rating is lower than the axle rating and
determines the GAWR. The GAWR is listed on the VIN plate.
GVWR (Gross Vehicle Weight Rating): The maximum allowable gross weight of the trailer and its
contents. The gross weight of the trailer includes the weight of the trailer and all of the items with it.
GVWR is sometimes referred to as GTWR (Gross Trailer Weight Rating) or MGTW (Maximum
Gross Trailer Weight). GVWR, GTWR and MGTW are all the same rating.
The sum total of the GAWR for all trailer axles may be less than the GVWR for the trailer, because
some of the trailer load is to be carried by the tow vehicle, rather than by the trailer axle(s). The total
weight of the cargo and trailer must not exceed the GVWR, and the load on an axle must not exceed its GAVR. The GVWR is listed on the VIN Plate.
VIN (Vehicle Identification Number): Identifies the trailer in four sections. The first section of three
characters identifies the manufacturer. The second section consists of five characters (VIN positions
4-8), these are the attributes of the vehicle. The third section is one character which is the check
digit. The fourth section consists of eight characters (VIN positions 10-17). The first character represents the vehicle model year, the second character represents the plant of manufacture. The third
through eighth characters are a sequential production number. The VIN Plate is located on the main
frame at the front, passenger side of the trailer.
PSI (Pounds Per Square Inch): The tire pressure measurement. The PSI is listed on the VIN
Plate.
Empty Weight: Some information that comes with the trailer is not a reliable source for ‘empty’
weight. The shipping documents list average or standard weights and your trailer may be equipped
with options. To determine the ‘empty’ or weight of your trailer, have trailer weighed at a commercial
scale.
Kingpin: The coupler on the front of the trailer that connects to the fifth wheel plate of the tow
vehicle.
Fifth Wheel Plate: A device on the tow vehicle that pulls and supports the weight of the trailer.
Trailer Lighting and Braking Connectors: A device that connects electrical power from the tow
vehicle to the trailer. If your trailer has electric brakes, the connector will also supply power to the
brakes from the tow vehicle.
Landing Gear: A device on the trailer that is often referred to as the ‘jack’, used to raise and lower
the trailer and for storage of the trailer. To operate the landing gear, pull the crank shaft outward for
high gear and push in for low gear speed. This is also the same handle, which will be used to open
the hopper doors. Maurer Manufacturing uses the Holland - Model Atlas 55 as standard equipment on
the 34’ thru 42’ trailers. The Holland - Model Atlas 55 with Dropleg is used on the 24’, 28’ and 30’ trailers
for improved swing auger clearance.
Registration Holder: This is located on the center of the kingpin. Use this to keep the registration
with the trailer at all times. The registration holder is often referred to as the “manifest” holder.
Page 4
SAFETY
TAKE NOTE! THIS SAFETY ALERT SYMBOL FOUND THROUGHOUT THIS MANUAL IS USED
TO CALL YOUR ATTENTION TO INSTRUCTIONS INVOLVING YOUR PERSONAL SAFETY AND
SAFETY OF OTHERS. FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN INJURY
OR DEATH!
THIS SYMBOL MEANS:
ATTENTION!
BECOME ALERT!
YOUR SAFETY IS INVOLVED!
SIGNAL WORDS
Note use of following signal words DANGER, WARNING, and CAUTION with safety messages. The
appropriate signal word for each has been selected using the following guidelines:
DANGER: Indicates an imminently hazardous situation that, if not avoided, will result in death or
serious injury. This signal word is to be limited to most extreme situations typically for machine
components which, for functional purposes, cannot be guarded.
WARNING: Indicates a potentially hazardous situation that, if not avoided, could result in death or
serious injury, and includes hazards that are exposed when guards are removed. It may also be used
to alert against unsafe practices.
CAUTION: Indicates a potentially hazardous situation that, if not avoided, may result in minor or
moderate injury. It may also be used to alert against unsafe practices.
EQUIPMENT SAFETY GUIDELINES
Every year many accidents occur which could have been avoided by a few seconds of thought and a
more careful approach to handling equipment. You, the operator, can avoid many accidents by observing
the following precautions in this section. To avoid personal injury, study the following precautions and
insist those working with you, or you yourself, follow them.
Operator should be a responsible adult. DO NOT ALLOW PERSONS TO OPERATE THIS UNIT
UNTIL THEY HAVE DEVELOPED A THOROUGH UNDERSTANDING OF SAFETY PRECAUTIONS
AND HOW IT WORKS.
DO NOT modify the trailer in anyway. Doing so may impair the function and/or safety and could affect
the life of the trailer.
Never exceed the maximum capacity of the trailer. By doing so you risk damage to your Maurer trailer.
If it's ability to do a job, or to do so safely is in question DON'T TRY IT.
Review safety instructions with all users annually.
Replace any caution, warning, danger or instruction safety decal that is not readable or is missing.
Location of such decals is indicated in this booklet.
Do not paint over, remove, or deface any safety signs or warning decals on your equipment. Observe
all safety signs and practice instructions on them.
Page 5
SAFETY SIGN LOCATIONS
Types of safety sign and locations on equipment are shown in illustration below. Good safety requires
that you familiarize yourself with various safety signs, type of warning, and area or particular function
related to that area, that requires your SAFETY AWARENESS.
SAFETY SIGN CARE
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Keep safety signs clean and legible at all times.
Replace safety signs that are missing or have become illegible.
Replacement parts that display a safety sign should also display current sign.
Safety signs are available from Maurer Manufacturing Spencer Plant.
Driver Side-Rear
Front Side-Center
DANGER
1
3
DANGER
CRUSH HAZARD
To prevent personal injury or death from
unexpected trailer movement
- Do not operate trailer with spring brakes caged,
deactivated, or removed.
- Use wheel chocks or blocking when parking trailer
with caged, deactived, or removed spring brakes.
WARNING
CAUTION
To prevent harm to air
brake valves, the use
of additives in the air
brake system is not
recommended.
SLIP/FALL HAZARD
To prevent injury,
assure good grip and
footing when climbing
on or into trailer.
SLIP/ENTRAPMENT HAZARD
To prevent serious injury or
death
- Do not enter hoppers if
not properly equipped
with interior steps
- Do not enter hoppers
when commodity is present
Rear Side-Center
NOTICE:
2
If the ABS indicator lamp
comes on and stays on when you
apply the brakes to a moving vehicle,
the trailer ABS is not working properly.
The ABS must be serviced as soon as
possible upon completion of your trip to
ensure full anti-lock braking capability.
TP-95172 MERITOR WABCO Rev. 7/01
WARNING
WARNING
Follow instructions to prevent property damage,
injury or death. Refer to product safety & service or
owner’s manual for additional information.
10
- Using sequence shown, tighten to 50 ft-lbs.,
3
and then torque to 450-500 ft-lbs.(oiled).
5
- Recheck torque level 50 to 100 miles after
7
installation and at 10,000 mile intervals.
1
8
6
4
2
DANGER
9
ENTRAPMENT HAZARD
To prevent serious injury or death
- Do not enter hoppers when
commodity is present
- Flowing grain can trap and
suffcocate within seconds
DANGER
SAFETY HAZARD
To prevent equipment
damage and serious injury
or death, use properly
matched wheels, studs,
brake drums, and cap nuts.
WARNING
SLIP/FALL HAZARD
To prevent injury,
assure good grip and
footing when climbing
on or into trailer.
SLIP/ENTRAPMENT HAZARD
To prevent serious injury or
death
- Do not enter hoppers if
not properly equipped
with interior steps
- Do not enter hoppers
when commodity is present
HOW TO APPLY SAFETY DECALS
1.
Be sure that the installation area is clean and dry.
2.
Be sure temperature is above 50°F(10°C).
3.
Decide on exact position before removing the backing paper.
4.
Remove smallest portion of split backing paper.
5.
Align decal over specified area and carefully press the small portion with the exposed sticky
backing in place.
6.
Slowly peel back remaining paper and carefully smooth remaining portions of decal into
place.
7.
Small air pockets can be pierced with a pin and smoothed out using a piece of decal backing
paper.
Page 6
REF.
NO.
PART
NO.
1.
2.
3.
1AQBY065000
1AQBZ065000
1AQAY000000
QTY. DESCRIPTION
1
1
1
Front Wall Decal Sheet
Rear Wall Decal Sheet
Product Has Been Laser Aligned
LOAD DISTRIBUTION SAFETY
The total weight of the load you put on the trailer, plus the empty weight of the trailer itself, must not
exceed the trailer’s Gross Vehicle Weight Rating (GVWR). You must distribute the load on the trailer
such that the load on any tire or axle does not exceed the tire load rating or the Gross Axle Weight
Rating (GAWR). If you do not know the weight of you trailer you must weigh it at a commercial scale.
See your VIN Plate for proper ratings. Not following these guidelines could cause serious injury or
even death.
TIRE AND LUG NUT SAFETY
It is essential to inspect the trailer tires and wheels before each tow. Trailer tires are more likely to fail
compared to car tires due to the heavier load the trailer carries. Please follow the list of guidelines and/
or possibilities below that could cause serious injury or even death.
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Replace the tire before towing if the tire has a bald spot, cut, bulge, is showing any cords, or
is cracked.
If uneven tread is noticed, take the trailer to a dealer service center for an inspection. Tire
imbalance, axle misalignment, or incorrect inflation could cause the uneven tread.
To little of tread will not be adequate enough for traction and can cause loss of control on wet
highways.
Tire pressure that is improper causes an unstable trailer and could blowout the tire causing loss
of control.
Check the tire pressure before towing, while the tire is cold. For the recommended PSI, see the
VIN Plate or the side wall of the tire.
Always order and install tires and wheels with appropriate type and load capacity to meet or
exceed gross weight of unit.
The inspection of the tire and wheel lug nuts is necessary since they are prone to loosen after first being
assembled. Please follow the list of guidelines and/or possibilities below that could cause serious injury
or even death.
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When towing a new trailer, check the lug nuts after the first 50 to 100 miles of driving.
Metal creep between the wheel and the lug nuts will cause wheel to loosen and could come off.
Check to make sure the lug nuts are tight before each tow.
Improper torque could cause the wheel to separate from trailer. A torque wrench should be used
to tighten the lugs nuts. If one is not available use a lug wrench then take to a trailer dealer or
service garage to tighten them to the required torque.
Page 7
BOLT TORQUE
TORQUE DATA FOR STANDARD NUTS, BOLTS, AND CAPSCREWS.
Tighten all bolts to torques specified in chart unless otherwise noted. Check tightness of bolts
periodically, using bolt chart as guide. Replace hardware with same grade bolt.
NOTE: Unless otherwise specified, high-strength Grade 5 hex bolts are used throughout
assembly of equipment.
Bolt Torque for Standard bolts *
Torque Specifications
“A”
GRADE 2
lb-ft
(N.m)
GRADE 5
lb-ft
(N.m)
GRADE 8
lb-ft
(N.m)
1/4”
5/16”
3/8”
7/16”
1/2”
9/16”
5/8”
3/4”
7/8”
1”
6
10
20
30
45
70
95
165
170
225
9
18
30
50
75
115
150
290
420
630
12
25
45
80
115
165
225
400
650
970
(8)
(13)
(27)
(40)
(60)
(95)
(130)
(225)
(230)
(300)
(12)
(25)
(40)
(70)
(100)
(155)
(200)
(390)
(570)
(850)
(16)
(35)
(60)
(110)
(155)
(220)
(300)
(540)
(880)
(1310)
Bolt Torque for Metric bolts *
CLASS 8.8
lb-ft
(N.m)
“A”
Torque figures indicated are valid for
non-greased or non-oiled threads and
heads unless otherwise specified.
Therefore, do not grease or oil bolts or
capscrews unless otherwise specified
in this manual. When using locking
elements, increase torque values
by 5%.
* GRADE or CLASS value for bolts
and capscrews are identified by their
head markings.
6
7
8
10
12
14
16
18
20
22
24
9
15
23
45
78
125
194
268
378
516
654
GRADE-2
CLASS 8.8
8.8
Page 8
(13)
(21)
(31)
(61)
(106)
(169)
(263)
(363)
(513)
(699)
(886)
CLASS 9.8
lb-ft
(N.m)
GRADE-5
CLASS 9.8
9.8
10
18
25
50
88
140
216
-----
(14)
(24)
(34)
(68)
(118)
(189)
(293)
-----
GRADE-8
CLASS 10.9
10.9
CLASS 10.9
lb-ft
(N.m)
13
21
31
61
106
170
263
364
515
702
890
(17)
(29)
(42)
(83)
(144)
(230)
(357)
(493)
(689)
(952)
(1206)
TORQUE REQUIREMENTS
It is extremely important to apply and maintain proper wheel mounting torque on your trailer axle. Torque
is a measure of the amount of tightening applied to a fastener (nut or bolt) and is expressed as length
times force. For example, a force of 90 pounds applied at the end of a wrench one foot long will yield
90 lbs/ft of torque. Torque wrenches are the best method to assure the proper amount of torque is being
applied to a fastener.
Note: Wheel nuts or bolts must be applied and maintained at the proper torque
levels to prevent loose wheels, broken studs, and possible dangerous separation of
wheel from your axle.
Be sure to use only the fasteners matched to the cone angle of your wheel (usually 60 degrees or 90
degrees). The proper procedure for attaching your wheels is as follows:
1. Start all bolts or nuts by hand to prevent cross threading.
2. Tighten bolts or nuts in the following sequence.
3. The tightening of the fasteners should be done is stages. Following
the recommended sequence, tighten fasteners per wheel torque
requirements diagram:
1
1
1
4
4
3
3
2
4 BOLT
2
5
3
8
6
1
3
4
5
5 BOLT
2
6 BOLT
10
6
4
5
2
8 BOLT
7
1
8
3
6
5
4
7
2
9
10 BOLT
4. Wheel nuts or bolts should be torqued before first road use and after
each wheel removal. Check and re-torque after the first 50 miles and
again at 100 miles. Check periodically thereafter.
WHEEL AND RIM TORQUE REQUIREMENTS
Description
Application
1/2” Cone Nut
12" – 13" Wheel
14" – 15" Wheel
5/8" Cone Nut
Flat Disc Wheel
175
225
3/4” Hex Nut
Demountable
Ring Clamp
210
260
3/4” Spherical Nut
Single Wheel
Inner Dual
450
450
500
500
1-1/2” Spherical Nut
Outer Dual
450
500
5/8" Flange Nut
Wheels
275
325
Page 9
Minimum Torque Maximum Torque
(lbs/ft)
(lbs/ft)
50
65
90
120
TRAILER TOWING GUIDE
Driving a vehicle while towing a trailer is completely different from driving the same vehicle without a
trailer. Acceleration, manipulation and braking are all reduced. It takes longer to get up to speed;
you need more room to turn and pass, and more distance to stop. You will need to spend time
adjusting to the different feel and maneuverability of the vehicle with a loaded trailer. Because of the
considerable differences in all aspects of manipulation when towing a trailer, the dangers and risks
of injury are also much greater than when driving without a trailer. You are responsible for keeping
your vehicle and trailer in control, and for all the damage that is caused if you lose control of your
vehicle and trailer.
Before you start towing the trailer, you must follow all of the instructions for inspection, testing,
loading and coupling. Also, before you start towing, adjust the mirrors so you can see the trailer as
well as the area to the rear of it.
Drive slowly at first, 5 m.p.h. or so, and turn the wheel to get the feel of how the vehicle and trailer
combination responds. Next, make some right and left hand turns. Watch in your side mirrors to see
how the trailer follows the vehicle. Turning with a trailer attached requires more room. Stop a few
times from speeds no greater than 10 m.p.h. Try using different combinations of trailer/air brakes
and vehicle brakes. Note the effect that the trailer brakes have when they are the only brakes used.
TRAILER TOWING SAFETY GUIDELINES
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Before towing, check coupling, trailer brakes, tires, wheels and lights.
Check the lug nuts and bolts for proper tightness.
Check coupler tightness after towing 50 miles.
Use your mirrors to verify that you have room to change lanes or pull into traffic.
Use your turn signals well in advance.
Allow plenty of stopping distance for your trailer and vehicle.
Do not drive so fast that the trailer begins to sway due to speed.
Allow plenty of room for passing. A rule of thumb is that the passing distance with a trailer
is four times the passing distance without a trailer.
Shift your automatic transmission into a lower gear for city driving.
Use lower gears for climbing and descending grades.
Do not ride the brakes while descending grades; they may get so hot that they stop
working. Then you will potentially have a runaway vehicle and trailer.
To conserve fuel, don’t use full throttle to climb a hill. Instead, build speed on the approach.
Slow down for bumps in the road. Take your foot off the brake when crossing the bump.
Do not brake while in a curve unless absolutely necessary. Instead, slow down before you
enter the curve and power through the curve. This way, the towing vehicle remains “in
control.”
Do not apply the brakes to correct extreme trailer swaying. Continued pulling of the trailer,
and even slight acceleration, will provide a stabilizing force.
Page 10
OPERATION SAFETY
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Carefully study and understand the Owner’s Manual and all safety decals before operating,
servicing, adjusting or repairing.
It is the owner/operators responsibility to read the manual and instruct other operators to
read the manual before operating.
Before towing, check kingpin, trailer brakes, tires, wheels and lights.
Always follow state and local regulations regarding safety chains and auxiliary lighting when
towing.
Check the lug nuts and bolts for proper tightness.
Keep wheels and lug nuts tightened to specific torque.
Secure wheels when trailer is not being used.
Assure tires are inflated evenly.
Make sure the brakes are evenly adjusted.
Visually inspect trailer for any loose bolts, worn parts, or cracked welds, and make necessary
repairs. (Follow maintenance safety instructions included in this manual.)
Securely attach to towing vehicle.
Make sure that tow rating on vehicle is high enough for what is being towed.
Check coupler tightness after towing 50 miles.
Clean reflectors and lights and check to make sure that they are working.
Use your mirrors to verify that you have room to change lanes or pull into traffic.
Use your turn signals well in advance.
Allow plenty of stopping distance for your trailer and vehicle.
Do not drive so fast that the trailer begins to sway due to speed.
Allow plenty of room for passing. A rule of thumb is that the passing distance with a trailer is
four times the passing distance without a trailer.
Always drive at a save speed and ensure that you are driving slow enough to make an emergency
stop if necessary.
No passengers allowed – Do not carry passengers anywhere on the trailer.
Beware of bystanders, particularly children, always look around and make sure it is safe to start
engine of tow vehicle or move the trailer. This is particularly important with higher noise levels,
as you may not hear people shouting.
When halting operations, even periodically, set towing vehicles parking brake, shut off engine,
and remove the ignition key, to prevent unauthorized operation.
Keep hands, feet, hair and clothing away from all moving and/or rotating parts.
A safe working environment is provided for the operator and bystanders just by following the
recommended procedures throughout this manual.
Be extra careful on inclines.
Use lower gears for climbing and descending grades.
Do not ride the brakes while descending grades; they may get so hot that they stop working.
Then you will potentially have a runaway vehicle and trailer.
To conserve fuel, don’t use full throttle to climb a hill. Instead, build speed on the approach.
Do not brake while in a curve unless absolutely necessary. Instead, slow down before you
enter the curve and power through the curve. This way, the towing vehicle remains “in charge.”
Do not apply the brakes to correct extreme trailer swaying. Continued pulling of the trailer,
and even slight acceleration, will provide a stabilizing force.
Slow down for bumps in the road. Take your foot off the brake when crossing the bump.
Shift your automatic transmission into a lower gear for city driving.
Page 11
OPERATION SAFETY (continued)
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In addition to the design and configuration of a trailer, hazard control and accident prevention
are dependent upon the knowledge, concern, and common sense of personnel involved in the
operation, transportation, maintenance and storage of the trailer.
Practice the operations and functions of your trailer. Don’t hurry the learning process or take it
for granted.
Untrained operators are not qualified to operate the trailer.
If the operation safety is followed, along with a good maintenance program your trailer will provide
you with years of trouble-free service.
With ideal road conditions follow the posted speed limit but do not exceed 60 mph.
SERVICE AND MAINTENANCE SAFETY
Carefully read this section on trailer service and maintenance safety. Good maintenance is your responsibility. Performing maintenance according to the schedule will prolong the performance and life
of you trailer and ensure the safety and liability of the operation. If you cannot perform the required
maintenance talk to your dealer about having them done. Also check the relevant component
manufacturer’s manual if available.
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Make sure there is plenty of ventilation. Never operate engine of towing vehicle in a closed
building. Exhaust fumes may cause asphyxiation.
Always block wheels and never use a jack as sole support.
Always use proper tools or equipment for job at hand.
Use extreme caution when making adjustments.
Follow torque chart in this manual when tightening bolts and nuts.
Openings in skin and minor cuts are susceptible to infection from brake fluid.
After servicing, be sure all tools, parts and equipment are removed
Do not allow grease or oil to build up on any step or platform.
When replacing bolts, refer to owner’s manual for proper size and grade.
Refer to bolt torque chart for head identification marking.
When replacement parts are necessary for periodic service and maintenance, genuine factory
replacement parts must be used to restore your trailer. Manufacturer will not claim responsibility
for use of unapproved parts and/or accessories or other damages.
If the trailer has been altered in any way from original design, any liability for injury or warranty
will not be accepted by Maurer Manufacturing.
A fire extinguisher and first aid kit should be kept accessible while performing any service and
maintenance on the trailer.
COUPLING THE TRAILER TO TOW VEHICLE
♦
Inspect Fifth Wheel
1. Check for damage/missing parts.
2. Check to see that mounting to tractor is secure, no cracks in frame.
3. Be sure that the fifth wheel plate is greased as required. Failure to keep the fifth wheel
plate lubricated could case steering problems due to friction between the tractor and
trailer.
Page 12
COUPLING THE TRAILER TO TOW VEHICLE (continued)
4. Check if fifth wheel is in proper position for coupling. Wheel tilted down towards rear
of tractor, jaws open, safety unlocking handle in automatic lock position.
5. If you have a sliding fifth wheel, make sure it is locked.
6. Make sure the trailer kingpin is not bent or broken.
♦
Inspect Area
1. Make sure area around vehicle is clear.
2. Be sure trailer spring brakes are on.
3. Check that cargo is secured against movement due to tractor being coupled to the
trailer.
♦
Position Tractor
1. Put the tractor directly in front of the trailer. Never back under the trailer at an angle,
you could push the trailer sideways and damage the landing gear.
2. Check position using outside mirrors and looking down both sides of the trailer.
♦
Back Slowly
1. Back up until the fifth wheel is just touching the trailer. Don’t hit the trailer.
♦
Secure Tractor
1. Put parking brake on and transmission in neutral.
♦
Check Trailer Height
1. The trailer should be low enough that it is raised slightly by the tractor when the tractor
is backed under. Raise and lower the trailer as needed. If trailer is too low, the tractor
may strike and damage the front of trailer. If the trailer is too high, it may not couple
correctly.
2. Check that the kingpin and fifth wheel are aligned.
♦
Connect Air Lines to Trailer
1. Make sure airlines are safely supported where they won’t be crushed or caught while
tractor is backing under the trailer.
2. Connect tractor emergency red airline to trailer emergency red glad hand. This provides
continuous air supply to trailer.
3. Connect service blue airline to trailer service blue glad hand. This provides air to trailer
only when brake is applied.
♦
Supply Air to Trailer
1. From cab, push in “air supply” knob or move tractor protection valve control from the
“emergency” to the “normal” position to supply air to the trailer brake system.
2. Wait until the air pressure is normal.
3. Check brake system for crossed airlines.
4. Shut engine off so you can hear brakes.
5. Apply and release trailer brakes, listen for sound of brakes being applied and released.
You should hear the brakes move when applied and air escape when the brakes are
released.
6. Check air brake system pressure gauge for signs of major air loss.
Page 13
COUPLING THE TRAILER TO TOW VEHICLE (continued)
7. When you are sure trailer brakes are working, start engine.
8. Check again that the air pressure is up to normal.
♦
Lock Trailer Brakes
1. Pull out the “air supply” knob, or move the tractor protection valve control from “normal”
to “emergency”.
♦
Back Under Trailer
1. Use lowest reverse gear.
2. Back trailer slowly to avoid hitting the kingpin to hard.
3. Stop when the kingpin is locked into the fifth wheel.
♦
Check Connection for Security
1. Raise trailer landing gear slightly off the ground.
2. Pull tractor gently forward while the trailer brakes are still applied.
3. Check and make sure that the trailer is locked onto the tractor.
♦
Secure Vehicle
1. Put parking brake on and transmission in neutral.
2. Shut off engine and take key with you so someone else won’t move the truck while you
are under it.
♦
Inspect Coupling
1. Use flashlight if necessary.
2. Make sure there is no spacing between trailer and fifth wheel. If there is a space something
is wrong. Kingpin may be on top of closed fifth wheel jaws; trailer will come loose
very easily.
3. Go under the trailer and look into the back of the fifth wheel. Make sure jaws are closed around
the shank of the kingpin.
4. Check that the locking lever is in the “lock” position.
5. Check that the safety catch is in a position over locking lever. On some fifth wheels the
catch must be put in place by hand.
6. If the coupling isn’t right, fix before operating.
♦
Connect the Electrical Cord and Check Air Lines
1. Plug the electrical cord into the trailer and fasten the safety catch.
2. Check both airlines and electrical lines for signs of damage.
3. Make sure air and electrical lines will not hit any moving parts on vehicle.
♦
Raise Trailer Landing Gear
1. Use low gear to begin raising the landing gear, once free of weight, switch to high gear.
2. Raise the landing gear all the way up. Never drive with the landing gear only part way up,
one or both could catch on objects.
3. After raising landing gear, secure the crank handle safely.
4. When full weight of trailer is resting on tractor:
5. Check for enough clearance between rear of tractor frame and landing gear. When the
tractor/trailer makes a sharp turn, the landing gear must clear the back of the tractor.
6. Check that there is enough clearance between the top of the tractor tires and the nose of
the trailer.
Page 14
UNCOUPLING THE TRAILER FROM TOW VEHICLE
♦
Position the Tractor and Trailer
1. Make sure surface can support weight of trailer.
2. Have the tractor aligned with the trailer, pulling out at an angle can cause damage to the
landing gear.
♦
Ease Pressure on Locking Jaw
1. Shut off trailer air supply to lock trailer brakes.
2. Ease pressure on fifth wheel locking plate by backing up gently, this will help you release
the fifth wheel locking lever.
3. Put parking brake on while tractor is pushing against the kingpin. This will hold the tractor
with pressure off the locking jaw.
♦
Inspect Area
1. Make sure area around the vehicle is clear.
♦
Lower the Landing Gear
1. Lower the landing gear until it makes firm contact with the ground, turn crank in low gear
a few extra turns; this will lift some weight off the tractor. Do not lift trailer off the fifth wheel.
This will make it easier to unlatch the fifth wheel and easier to couple next time.
♦
Disconnect Airlines and Electrical Cables
1. Disconnect airlines from trailer. Connect glad hands to dummy coupler at back of cab, or
coupler them together.
2. Hang electrical cable plug down to prevent moisture from entering the end.
3. Make sure lines are supported so they won’t be damaged while driving the tractor.
♦
Unlock Fifth Wheel
1. Pull the release handle to “open” position.
2. Keep legs and feet clear of the rear tractor wheel to avoid serious injury in case the vehicle
moves.
♦
Drive Tractor Partially Clear of Trailer
1. Drive tractor forward until fifth wheel comes out from under the trailer.
2. Stop the tractor frame under trailer; this prevents the trailer from falling to ground if landing
gear should sink or fail.
♦
Secure Tractor
1. Apply parking brake and place transmission in neutral.
♦
Inspect Trailer Landing Gear
1. Make sure ground is supporting the trailer and landing gear is not damaged.
♦
Pull Tractor Clear of Trailer
1. Release parking brake.
2. Check the area and drive tractor clear of trailer.
Page 15
MOUNTING THE SIDE DISCHARGE CHUTE
Position the hopper assembly with the bottom inside the door rail flange. Mark the top four hole
positions for drilling, then open the side chute door and mark the bottom two hole positions and the
rectangular opening for the grain unloading. Remove the assembly and drill 3/8” holes and cut out the
rectangular opening. Bolt assembly to hopper and add rubber straps by bolting to the vertical braces.
Side Discharge Chute
Mounting holes
in 6 places on
chute.
Hopper: Top (attached to trailer)
Arrows (2) show where
to mount rubber straps.
Door rail
flange
Hopper: Bottom
Page 16
BOLT-ON 2-SPEED HOPPER ASSEMBLY BREAK DOWN
NOTE: The 2-speed gear used on the hopper is the same type that is used on our
Holland 51,000 Jack. Please see page 25, for operating instructions.
REF.
NO.
PART
NO.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
1ACF05F0000
1AFC08D0000
1AFC08E0000
1AFC12FBA05
1AFC17Q0000
1AFC37DAA05
1AFC37EAAH5
1AHMSNLCCA0
1AJGGEARBOX
30010135
3G000105
3G000106
3G000107
QTY. DESCRIPTION
2
5
4
2
2
5
4
1
1
1
1
1
1
3/8” Center Lock Nut
1/4”-20 Serrated Flange Nut
5/16”-18 Flange Nut
3/8”-16 X 2” Long Hex Bolt
1” Hex Nut
1/4”-20 X 1” Serrated Flange Bolt
5/16”-18 X 1 1/2” Serrated Flange Bolt
Hinge, Hopper Stop
Gear Box Assembly
Two Speed Lock
Bolt-On 2-Speed Crank Hanger
2-Speed Hopper 1” Crank Shaft
2-Speed Bolt-On Crank Coupler
Page 17
SPRING BRAKE CONTROL VALVES - SPRING BRAKE PRIORITY
♦
♦
♦
♦
♦
♦
♦
♦
♦
The spring brake priority immediately provides supply air to release the spring brakes, the internal
Pressure Protection Valve opens to also fill the reservoir at approximately 80 psi.
Complies with all changes to FMVSS 121, Docket 90-3 Effective October 8, 1992.
Designed for use with a single reservoir on a typical single or tandem axle trailer.
May also be used with two 1,400 cubic inch (nominal) reservoirs on tandem axle trailers.
Mounting Hardware on page 61 & 62
Piping examples on pages 71, 72, 74, 75 & 76.
PLUG UNIT ASSEMBLY 1105815 for pressure protection.
PLUG UNIT ASSEMBLY 110520 for movable seat.
REPAIR KIT 110501
For complete information view the Sealco website at www.sealcocvp.com
Part
Number
Supply
PORT SIZES (NPT)
Control
Reservoir Delivery(4)
COMMENTS
110500
3/8”
3/8”
1/2”
3/8”
None
110505
3/8”
3/8”
1/2”
3/8”
Delivery Back Ports B plugged
110510
3/8”
3/8”
1/2”
3/8”
Delivery Side Ports A plugged
Page 18
Page 19
No
Adjust tractor governor
cut-in pressure to 105
P.S.I.
Check for sufficient
supply pressure from
tractor at trailer
supply glad-hand. Is
there at least 95
P.S.I.?
No
Yes
Yes
No
If Sealco SBCV,
install new pressure
protection plug unit
assembly. Replace
valve if other-make
SBCV.
No
No
Clean or replace
check valve in control
port of SBCV.
Yes
When supply line is
charged, does air
leak out of control
glad-hand or out of
exhaust port of foot
valve or hand valve?
Check for sufficient
air pressure at spring
brake chamber. Is
there a minimum of
70 P.S.I?
Eliminate cause
for restrictions.
Yes
Parking brakes
release slowly or
not at all?
No
LEGEND
SBCV = Spring Brake
Control Valve
CONTACT your Sealco Regional Manager or Sealco Technical Services at (602) 253-1007
Yes
Clean line filter and/or
filter screen.
Check for supply line
filter or filter screen in
supply port of SBCV.
Is it plugged with dirt?
No
Are there restrictions
in supply line; i.e.,
severe bends, kinks,
or blockages?
If Sealco SBCV, install
new exhaust plug unit
assembly. Replace
valve if other-make
SBCV.
Are air reservoirs
slow to fill with air?
Yes
No
Yes
Does air leak from
exhaust port of SBCV?
CAUTION: Block wheels before servicing trailer air brake system. Drain reservoirs before
removing airlines, hoses, valves, or servicing valve plug units. Consult spring brake
manufacturer’s safety recommendations before working on spring brake chambers.
TROUBLESHOOTING GUIDE
Trailer Emergency / Supply For 121 System
Page 20
Readjust
Replace SRV or if
Sealco replace exhaust
plug unit if applicable.
Yes
No
Replace CLV
Yes
Yes
No
Make service
brake application
& release. With 0
P.S.I. in control
line to control
port of SRV. Is
there air trapped
in delivery lines
from SRV to
chambers?
Yes
Is there a CLV
in the system?
Eliminate cause for
restrictions (if any)
See trailer emerg./
supply troubleshoot
‘Are air reservoirs
slow to fill’.
Are service brakes
slow to apply or
don’t apply at all?
Make service brake
application & release.
With 0 P.S.I. in
control line to control
port of CLV. Is there
air trapped in delivery
lines from CLV?
Are there restrictions in
control line; i.e., severe
bends, kinks, or
blockages? (control line
must be at 0 P.S.I. to fully
release service brakes.)
No
Does this problem
occur only when
towed by a certain
tractor?
No
Are slack adjusters
over-adjusted?
Does air leak when
spring brakes are
applied or released?
Yes
Yes
Yes
Yes
Do service brakes No
release slowly
and/or drag?
Yes
No
Yes
No
Adjust
Replace SRV or if Sealco
replace exhaust plug unit
if applicable.
Possible air system
imbalance between tractor
and trailer, consult Sealco
for use of duplex test
gauge No. 110384 for air
system balance test.
Yes
Did you check for restrictions in
tractor control line from foot
valve to TPV and airline from
TPV to trailer control glad-hand?
No
Are there restrictions in
control line; i.e., severe
bends, kinks, or blockages?
Yes
Is there air pressure
in the air reservoir?
No
Do slack
Yes
adjusters need
adjusting?
LEGEND
SRV = Spring Relay Valve
CLV = Control Line Valve
TPV = Tractor Protection Valve
CONTACT your Sealco Regional Manager or Sealco Technical Services at (602) 253-1007
Check for faulty spring
brake chambers(s) with
leak between service &
emergency sections.
Yes
No
Eliminate cause
for restriction
Check foot valve hinge
pin and plunger for
binding. Check for
restrictions in control
line from foot valve to
TPV and airline from
TPV to trailer control
glad-hand.
Does air leak only
when spring brakes
are released?
Yes
Does air leak from
No
exhaust port of SRV?
CAUTION: Block wheels before servicing trailer air brake system. Drain reservoirs before removing
airlines, hoses, valves, or servicing valve plug units. Consult spring brake manufacturer’s safety
recommendations before working on spring brake chambers.
TROUBLESHOOTING GUIDE
Trailer Service / Supply For 121 System
HOW TO BRAKE WITH ABS
Do what good drivers have always been doing: brake just the way you always have.
Apply brakes as normal to stop in time. When your ABS starts working, don’t release your brakes,
maintain brake pressure.
♦
If driving with a single trailer, doubles or triples...
Watch your trailer(s) through your mirrors and correct brake pressure as necessary to
keep in a straight line.
♦
If only your tractor has ABS...
Use your rig’s brakes as necessary to straighten out your trailer if it swings out. Watch
the trailer through your mirrors to make sure it follows your tractor properly.
♦
If only your trailer has ABS...
Use your rig’s brakes as necessary to maintain control and keep your combination in its
lane.
Avoid rapid “pumping” of the brakes. During a brake application that could result in a wheel lock.
Meritor WABCO ABS automatically releases and applies the brake up to five times per second, obviously much faster than you could do pumping the brake pedal.
Always remember that you are the most important element in the safe operation of your vehicle. ABS is not an excuse to take unnecessary risks. Always drive carefully and stay a safe distance
away from the vehicle in front of you.
TRAILER ABS
Turn on
vehicle ignition
Begin to
drive the vehicle
Yes
If the lamp comes on
above 4 mph, or if it
remains on during the
entire braking application,
there is a malfunction.
Your vehicle should be
serviced as soon as
possible after completing
the trip.
Does
No
the trailer
mounted ABS
warning lamp come on
above 4 mph or come on and
stay on during the
entire braking
application?
System
is OK
NOTE: Depending how the ABS is powered, the lamp may come on briefly at
ignition and then go off, or briefly flash each time you apply the brakes
on a moving vehicle.
Page 21
MERITOR WABCO
Easy-StopTM
and
Enhanced Easy-Stop with PLC Trailer ABS
Blink Code Diagnostic Guide
Easy-Stop
2S/1M Basic
ECU/Modulator Valve Assembly
Easy-Stop 2S/1M,
2S/2M*, 4S/2M*, 4S/3M* Basic
ECU/Modulator Valve Assembly
6
YE2
6
BU1
3
YE1
4
4
3
5
BU2
5
4
*External modulator
valve and cable required.
Enhanced Easy-Stop with PLC
2S/1M Basic ECU/Single
Modulator Valve Assembly
YE 2/6
2S/2M Basic ECU/Dual
Modulator Valve Assembly
YE 1/4
2S/2M,
4S/2M,
2S/2M,
4S/2M,
4S/3M
Premium
ECU/Dual
4S/3M*
Premium
ECU/Dual
*
Modulator
Valve
Assembly
Modulator Valve Assembly
*External modulator valve and cable required.
This publication covers all Enhanced Easy-Stop ECU/Valve Assemblies and
Easy-Stop ECU/Valve Assemblies with serial numbers 3080002746 and higher.
For Easy-Stop ECU/Valve Assemblies with serial numbers 3080002745 or lower,
please call 1-800-535-5560 for assistance. Serial numbers are located on the
bar-code label on the side of the ECU/Valve Assembly.
Page 22
Typical Sensor Locations
YE2
YE1
BU1
BU2
EASY-STOP - 2S/1M
YE1
ç
Most Easy-Stop ECUs have a blink code lamp
on the top of the ECU. Some early version 2100
Basic ECUs do not have a blink code switch or
remote diagnostic tool. Instead, power the ECU,
the LED lamp on top of the ECU/Valve Assembly
will repeatedly flash the blink code if there is a
fault.
ç YE2
ENHANCED EASY-STOP - 4S/2M
ECU/VALVE ASSEMBLY MTD WITH SENSORS
FACING FRONT OF TRAILER
ç
BU2
ç YE2
ç
ç BU1
BU1
ç
YE1
ç BU2
ç
YE2
ECU/VALVE ASSEMBLY MTD WITH SENSORS
FACING REAR OF TRAILER
ç YE1
CURBSIDE
ROADSIDE
CURBSIDE
FRONT OF TRAILER
ROADSIDE
FRONT OF TRAILER
Enhanced Easy-Stop blink codes may be accessed by ignition circuit and counting
flashes on the trailer ABS indicator lamp on the side of the trailer.
To access blink codes:
♦ Turn ignition ON for one second.
♦ Turn OFF for one second,
♦ Turn ignition ON and count the flashed on the ABS Lamp.
With Enhanced Easy-Stop, the blink code tool and the ABS Lamp on the trailer do
not function simultaneously.
Page 23
Easy-Stop Troubleshooting and Repair
BLINK
CAUSE OF FAULT
CODE
ACTION REQUIRED
0
No faults
System okay. No action required
3
Sensor BU1: Cable break, short circuit or out of
adjustment.
Check sensor, sensor cable connection; adjust
sensor; or check for excessive hub runout, a sensor
gap that is too wide or damage to the tooth wheels.
4
Sensor YE1: Cable break, short circuit or out of
adjustment.
Check sensor, sensor cable connection; adjust
sensor; or check for excessive hub runout, a sensor
gap that is too wide or damage to the tooth wheels.
5
Sensor BU2: Cable break, short circuit or out of
adjustment.
Check sensor, sensor cable connection; adjust
sensor; or check for excessive hub runout, a sensor
gap that is too wide or damage to the tooth wheels.
6
Sensor YE2: Cable break, short circuit or out of
adjustment.
Check sensor, sensor cable connection; adjust
sensor; or check for excessive hub runout, a sensor
gap that is too wide or damage to the tooth wheels.
7
Ext. Modulator (RD): Short to power, cable break
or open, short to ground or cable damaged, or
ECU/Valve Assembly failure.
Check ABS valve and cable. Replace as required.
9
Easy-Stop: External Modulator (BU)
Enhanced Easy-Stop: Internal Modulator Failure,
Inlet Valve #2: Short to power, cable break or
open, short to ground or cable damaged, or
ECU/Valve Assembly Failure.
Easy-Stop: Check ABS valve and cable. Replace
as required.
Enhanced Easy-Stop: Verify proper installation. If
code continues, contact Meritor WABCO for
assistance.
10
Easy-Stop: ECU/Valve Assembly Modulator (YE)
Enhanced Easy-Stop: Internal Modulator Failure,
Inlet Valve #2: Short to power, cable break or
open, short to ground or cable damaged, or
ECU/Valve Assembly Failure.
Easy-Stop: Check ABS valve and cable. Replace
as required.
Enhanced Easy-Stop: Verify proper installation. If
code continues, contact Meritor WABCO for
assistance.
11
Internal Modulator Failure, Outlet Valve.
Enhanced Easy-Stop Only.
Verify proper installation. If code continues, contact
Meritor WABCO as assistance.
14
Power Supply: Over or under voltage, current low,
or internal failure.
Repair vehicle power supply, check vehicle voltage
output and connector; check ECU’s configuration.
15
ECU – Internal Failure
Internal failure.
Internal failure, contact Meritor WABCO.
16
SAE J1708 Failure
Internal failure, contact Meritor WABCO.
17
Generic SAE J2497 Failure
Internal failure, contact Meritor WABCO.
18
Generic I/O Failure
Verify proper electrical installation. Check power
supply. Make necessary corrections.
Note: (Easy-Stop only) If the blink code indicates there are no faults, but the trailer ABS indicator lamp
continues to come on and stay on when you apply the brakes to the moving vehicle, there is an intermittent
fault that must be repaired. Refer to Maintenance Manual 33, Expert Mode Diagnostics.
For further information on blink code diagnostics, refer to Maintenance Manual 33 (Easy-Stop),
Maintenance Manual No. 0180 (Enhanced Easy-Stop) or call:
Meritor WABCO at 800-535-5560.
Page 24
OPERATION
Model 51,000 (8 Bolt) Model 50,000 (10 Bolt)
LOW
LOW
CONVENTONAL
REVERSE
PUSH CRANK IN FOR HIGH SPEED.
PULL CRANK OUT FOR LOW SPEED.
ROTATE CRANK COUNTERCLOCKWISE
TO EXTEND LANDING GEAR.
ROTATE CRANK CLOCKWISE
TO RETRACT LANDING GEAR.
PULL CRANK OUT FOR HIGH SPEED.
PUSH CRANK IN FOR LOW SPEED
ROTATE CRANK CLOCKWISE
TO EXTEND LANDING GEAR.
ROTATE CRANK COUNTERCLOCKWISE
TO RETRACT LANDING GEAR.
HIGH
CCW
HIGH
CW
CW
OPERATION
CCW
Fast Gear
LOW
LOW
CONVENTONAL
REVERSE
PUSH CRANK IN FOR LOW SPEED.
PULL CRANK OUT FOR HIGH SPEED.
ROTATE CRANK CLOCKWISE
TO EXTEND LANDING GEAR.
ROTATE CRANK COUNTERCLOCKWISE
TO RETRACT LANDING GEAR.
PULL CRANK OUT FOR LOW SPEED.
PUSH CRANK IN FOR HIGH SPEED
ROTATE CRANK COUNTERCLOCKWISE
TO EXTEND LANDING GEAR.
ROTATE CRANK CLOCKWISE
TO RETRACT LANDING GEAR.
HIGH
CW
HIGH
CCW
CCW
CW
LUBRICATION – STANDARD:
TO REMOVE TRACTOR
FROM TRAILER:
1. Position the trailer so that the landing gear
shoes will rest on a firm level surface when
landing gear is extended.
2. Shift landing gear to high gear and extend
landing gear until shoes contact ground.
3. Shift landing gear to low gear and lift trailer
approximately (1) inch.
When manufactured, the landing gears have
been adequately greased with high quality
lubricant. It will be necessary to periodically
supplement this lubricant to maintain
satisfactory performance. Use a molybdenum
type grease with appropriate temperature
range for your operating conditions. Gearbox
leg has (3) grease fittings; leg without gearbox
has (2) grease fittings.
1. Prior to lubrication, extend legs approximately
(2) inches from maximum retracted position.
4. Unlock fifth wheel, uncouple air lines, and
drive the tractor out from under the trailer.
2. For optimum performance, every (6) months
lube both legs at all grease fittings.
3. Add 1/4-lb grease at each grease fitting.
TO CONNECT TRACTOR
TO TRAILER:
1. Ensure that the trailer is at a sufficient height
to allow coupling of the tractor and trailer.
2. Connect air lines from tractor to trailer, then
lock trailer brakes and back tractor under
trailer, then lock fifth wheel.
LUBRICATION – NoLube:
No additional grease is required.
3. Retract landing gears to fully retracted
position.
4. Store crank on the crank holder.
XL-LG330-01 Rev. B
2
Page 25
TROUBLE SHOOTING:
In normal trailer operating service, certain components such as shafts, bushings, bearings, gears, and
screw and nut assemblies are subject to wear and will require replacement.
However, under extreme usage condition exceeding AAR-931 Durability Requirements the same
components may require replacement more frequently.
Landing gears hard to crank–check the following:
PROBLEM
SOLUTION
1. Cross driveshaft in a bind or tight
between shafts.
2. To determine which leg turns hard
Bolts must be loose and cross driveshaft free to
move in slots provided.
Remove cross driveshaft bolt and crank each leg
on the jack shaft.
(See Lubrication Instructions).
Legs must be timed together, parallel to each other
and perpendicular to the trailer crossmembers.
Replace damaged part.
Disassemble and inspect for wear. If screw and/or
nut show considerable wear, then replace entire
retracting tube assembly.
Minimum end play 1/32˝.
3. Inadequate lubrication.
4. Alignment.
5. Upper housing or retracting tube may be bent.
6. Screw and nut assembly may have excessive
wear and be hard to turn or inoperable.
7. Check for proper clearance between pinion
and bevel gear.
8. Excessive wear or damage to pinion, bevel,
input, idler and/or output gears.
9. Landing gear jack shafts and/or shift shaft
binding.
10.
11.
12.
13.
Bent retracting screw.
Damaged thrust bearing.
Damaged collar.
Damaged shift lock boss and/or shaft
bearing boss.
14. Weld blow through where strut bracket is
welded to housing. (With no-load on landing
gear, the retract tube should have free play
inside housing.)
15. Impact to jack shaft end has pressed bearing
boss into gearbox half.
Replace damaged gears.
Check to see if trailer mounting bracket has
sufficient size clearance hole to miss landing gear
boss or shift shaft.
Replace entire retracting tube assembly.
Replace.
Replace.
Replace.
Grind weld as required and re-weld.
Press boss back into position.
Trouble Shooting/General:
1. Right-hand leg (gearbox leg) operates but
left-hand leg does not move.
2. Legs will not operate when turning jack shaft.
3. Right-hand leg will not operate, shift shaft
will turn but jack shaft does not turn.
4. Leg locked and will not turn.
5. Right-hand leg will not stay fully shifted in
low gear.
6. Noisy gearbox.
Broken cross driveshaft bolt or damaged cross
driveshaft. Replace damaged part.
Damaged pinion or bevel gear. Replace damaged part.
Damaged input, idler, and/or output gear. Replace
damaged part.
Bent retracting screw or damaged riser nut and
screw. Replace entire retracting tube assembly.
Shift lock ball and shift lock spring missing or
damaged shift lock spring. Replace missing or
damaged part.
Check that shift shaft movement is 1˝ when shifted
between gears.
XL-LG330-01 Rev. B
3
Page 26
CAUTIONS:
Landing gears are designed to meet T.T.M.A. recommended practice RP-4 and A.A.R.-931 requirements.
When operating the landing gears, it is necessary to observe some cautions. By doing so you will ensure long
trouble free service.
CAUTION
1. Do not over extend or over retract landing gears.
2. Never drop trailer on landing gears. Always extend landing gears until sand shoes
contact ground, then lift trailer approximately 1 inch before removing tractor
from trailer.
3. Always ensure that landing gear shoes or foot pads will rest on a hard ground
surface or concrete pad. If necessary, place shoes on a support plank to prevent
the landing gears from sinking into the ground surface. (This is especially
important with liquid cargo where a shift in the contents could overturn the
trailer!).
4. Always retract landing gears fully before moving the trailer.
5. Always store the crank on the crank holder after extending or retracting the
landing gear.
6. Replace all damaged or missing parts.
7. Failure to replace worn or damaged riser nut and retracting screw assembly could
cause a failure.
HOLLAND USA, INC.
1950 Industrial Blvd. • P.O. Box 425 • Muskegon, MI 49443-0425 • Phone 888-396-6501 • Fax 800-356-3929
www.thehollandgroupinc.com
Copyright © March 2005 • The Holland Group, Inc.
Holland USA, Inc. Facilities:
Holland International, Inc.
Holland Hitch of Canada, Ltd.
Holland Equipment, Ltd.
Holland Hitch Western, Ltd.
Dumas, AR
Holland, MI
Monroe, NC
Holland, MI
Phone:
616-396-6501
Fax:
616-396-1511
Woodstock, Ontario • Canada
Phone:
519-537-3494
Fax:
800-565-7753
Norwich, Ontario • Canada
Phone:
519-863-3414
Fax:
519-863-2398
Surrey, British Columbia • Canada
Phone:
604-574-7491
Fax:
604-574-0244
Muskegon, MI
Warrenton, MO
Wylie, TX
Ph: 888-396-6501 Fax: 800-356-3929
XL-LG330-01 Rev. B
4
Page 27
ATLAS 55 Standard - Exploded View
PART NUMBER & DATE
CODE TAG LOCATION
15
16
16
14
15
7
6
33
13
16
16
5
14
8
7
6
33
Models before
May 2011
PART NUMBER & DATE
CODE TAG LOCATION
11 12*
*Models Mfg. prior to January 2013, see page 16.
5
9
33
8
32 10
34
10
23*
11
1A
22
30
20 35
34
35
gy From
Technolo
27* 51
24
4
25
1B
3
35
4
10
Non-Geared Leg Repair KitUniversal Shaft (1-speed) RK-11442
4
3
16
3
16
16
2C
4
7
6
3
2A
5
11
8
2B
33
33
12
9
2D & 2E
39
18
Geared Leg Repair Kit-Universal
Shaft (2-speed) RK-11443
40
41
42
38
44
18
40
32
48
11
23
9
50
22
18
40
43
30
20
35
45
51
24
49
12
25
16 10
XL-LG11389PM-en-US Rev E 2013-10 Amendments and errors reserved. © SAF-HOLLAND, Inc.
Page 28
ATLAS 55 Standard - Parts List
TRAVEL
NO.
DESCRIPTION
RETRACT
TUBE CODE
13.50”
15.50”
17”
17”CAN.
17” MRL
19”
2A
2B
2C
2D
2E
Retract Tube - RCF
Retract Tube - Low Profile RCF
Retract Tube - Axle
Retract Tube - Shockfoot 10” DIA
Retract Tube - Shockfoot 12” DIA
0 or 5 (MRL)
0
0
0,6 (CAN) or B
0,6 (CAN) or B
LG3053-01
LG3097-01
LG3012-01
LG3061-02
LG3061-01
LG3053-02
LG3097-02
LG3012-02
LG3061-03
N/A
LG3053-04
LG3097-03
LG3012-03
LG3061-04
LG3061-05
N/A
N/A
N/A
LG3061-07
LG3061-08
LG3053-03
N/A
N/A
LG3061-10
LG3061-11
LG3053-05
NA
LG3012-04
LG3061-13
LG3061-14
NO.
DESCRIPTION
PART NO.
1A
1B
3
4
5
6
7
8
9
10
11
Upper Housing LH
Upper Housing RH
Collar
Thrust Bearing
Washer - FL 2”OD x 1.19” ID x .13” THK
Pin - DIA .38”x 2"
Bevel Gear
Pinion Gear
Groove Pin - DIA .38” x 1.50”
Ftg - Grease .25”-28 Self Tapping
O-Ring, #319
Jack Shaft LH - Universal Mount
- I-Beam Mount, 6.50”
- I-Beam Mount, 10.00”
- Conventional Mount
- Reverse Mount
Pin - Spring DIA .25” x 1.5” (Not Required)
Top Cover
Self-Tapping Screw .25”-20 x .5” Lg
Screw, Hex Cap .38”-16 x 2.25”Lg GR5
Self-Locking Nut .38”-16 - Sandshoe
- Low Profile RCF
- RCF
Washer .38” Std Type A
Gearbox Half, Outside w/Hole for Grease Fitting
Output Gear
Jackshaft RH - Universal Mount
- I-Beam Mount, 6.50”
- I-Beam Mount, 10.00”
- Conventional Mount
- Reverse Mount
Gear, Drive, High Speed - Machined
Gear, Drive, Low Speed - Machined
Groove Pin, Type E DIA .38” x 2.00” Lg
Shift Shaft - Universal
- I-Beam & Conventional
- Reverse
Idler Gear
Boss, Hex Lock - Oversized
Hex Lock Boss - Sealed
Idler Shaft Bushing (Included in Item #23)
Boss Bearing - Sealed (Included in Item #20)
N/A
N/A
XB-LG0544
XB-BRG-013-77
XB-PW-016-62
XA-CRP-V-06635
LG2884
LG1823-02
XB-GP-014-18
XB-GRF-022-16
2024100000100
LG2964-01
LG2964-04
LG2964-05
LG2964-02
LG2964-03
N/A
2111100004080
XB-STS-008-11
XB-HHC-050-42
XB-SLN-012-04
XB-SLN-012-04
12
13
15
16
17
18
19
20
22
23
24
25
26
27
30
32
33
34
35
XB-PW-016-03
LG2996
LG2980
LG2963-01
LG2963-04
LG2963-05
LG2963-02
LG2963-03
2040100000060
2040100000050
XB-GP-052-21
2111100003400
2111100003410
2111100003420
LG2975
2022100000180
LG2926-10
LG3005
LG0659-10
SPEED
ONE TWO
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
2
3
1
2
-
1
1
1
2
1
1
1
3
1
1
9
2
3
4
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
NO.
38
39
40
41
42
43
44
45
48
49
50
51
DESCRIPTION
Sandshoe - 10" x 10" x 4.50"
- 10" x 12" x 4.50"
- 10" x 10" x 2.00"
- 10" x 12" x 2.00"
Sandshoe Axle - Hollow Axle 8.50" Lg
Screw, Hex Cap .38"-16 x .75" Lg GR5 Sandshoe
Screw, Hex Cap .38"-16 x .75" Lg GR5 Low Profile RCF
Cushion Foot Plate
Cushion Foot Rubber
Bolt - Hex Head .63” -11 x 5.50”
R.C.F. - DIA 10”
- DIA 12”
- 10” x 10”
Self-Locking Nut - .63”-11”
Cushion Foot Pad - Low Profile RCF
Interchangeable Collar - Low Profile RCF
Interchangable Strap
Pin Groove, .31” Dia. x 2.00” Lg
PART NO.
SPEED
ONE TWO
50616001
50616000
50616008
50616007
LG0070-02
1
1
1
1
1
1
1
1
1
1
XB-HHC-050-69
1
1
XB-HHC-050-69
2
2
LG0725
XB-LG0726
XB-HHB-050-70
LG0718-01
LG0740-01
LG0732-01
XB-SP0012-10
728003
730640
730638
XB-GP-052-52
1
1
1
1
1
1
1
1
1
1
-
1
1
1
1
1
1
1
1
1
1
1
For technical assistance please go to
www.safholland.us or call 800.876.3929
XL-LG11389PM-en-US Rev E 2013-10 Amendments and errors reserved. © SAF-HOLLAND, Inc.
Page 29
13
MECHANICAL
SUSPENSION
INSTALLATION
AND MAINTENANCE
INSTRUCTIONS
DuraLite® Series
Installation, Maintenance
and Warranty Information
CONTENTS
Page
Page
General Information. . . . . . . . . . . . . . . . . . . . . . 2
Install Straddle Mount Hanger Brackets . . . . . . 6
Notes, Cautions and Warnings. . . . . . . . . . . . . . 2
Weld Axle Seats to Axle(s) . . . . . . . . . . . . . . . . . 7
Installation Preparation . . . . . . . . . . . . . . . . . . . 2
Assemble Torque Arms and Leaf Springs. . . . 8, 9
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Axle Alignment Instructions . . . . . . . . . . . . . . 10
Locate Hanger Brackets . . . . . . . . . . . . . . . . . . . 3
Final Inspection. . . . . . . . . . . . . . . . . . . . . . . . . 10
Install Under Mount Hanger Brackets . . . . . . . . 4
Maintenance recommendations. . . . . . . . . . . . 11
Install Flange Mount Hanger Brackets. . . . . . . . 5
Leaf Spring Selection. . . . . . . . . . . . . . . . . . . . . 12
Mounting Height Spring Seat Selections . . . . . 12
XL-MS175 Rev. C
1
Page 30
GENERAL INFORMATION
The DuraLite suspension is available in three
hanger bracket mounting styles: straddle mount,
under mount and flange mount. The DuraLite
suspension may be used as a single axle, tandem
axle or triple axle. The base suspension is the
single axle – adding a multi-axle conversion kit
converts the single axle to a tandem and a second
multi-axle kit will make a triple axle suspension.
The DuraLite suspension is available in overslung
(axle below the spring) or underslung (axle above
the spring) configuration.
The following instructions provide the minimum
requirements for installing the Holland DuraLite®
suspension. It is the responsibility of the installer to
determine the proper location of the suspension, to
provide an adequate structure to support the
suspension, to insure adequate clearances with
other components and to determine if the rated
capacity is adequate for the applications.
NOTES, CAUTIONS AND WARNINGS
You must read and understand all of the safety
procedures presented in this manual before
starting any work on the suspension.
Proper tools must be used to perform the
maintenance and repair procedures described in
this manual. Many of these procedures require
special tools.
INSTALLATION PREPARATION
The proper installation of the suspension is
critical to assure trouble free operation. Before
proceeding with suspension installation, check
the tire size and trailer design to make sure that
there is lateral tire clearance and a vertical tire
clearance of at least 41⁄2˝ when the trailer is empty.
Vertical tire clearance may be adjusted by using
different height spring seats or high, medium or
low arch springs. Holland DuraLite suspensions
are rated at 22,400 pounds GAWR (Gross Axle
Weight Rating) with one, two or three leaf springs
and 24,000 pounds GAWR with heavy duty leaf
springs. (Holland does not supply springs.) For
leaf spring selection and mounting height
information, see Tables 1, 2 and 3 on page 12.
Check that adequate clearance is provided to all
components of the trailer, including but not
limited to tires, brakes and air lines.
IMPORTANT:The suspension hangers must be on
the same centers as the spring seats and springs,
within the tolerances shown. The springs must be
square with the axles and located the same
distance from the axle centerline within the
tolerances shown.
Failure to use the proper equipment could result in
personal injury and/or damage to the suspension.
Failure to correctly install the components can lead to
the following trailer problems: trailer lean, improper
tracking, premature tire wear and shortened
suspension life. Failure to comply with these
installation instructions without written permission will
void the suspension warranty.
Safety glasses must be worn at all times when
performing the procedures covered in this manual.
WARRANTY
Throughout this manual, you will notice the
terms “NOTE,” “IMPORTANT,” “CAUTION” and
“WARNING” followed by important product
information. So that you may better understand
the manual, those terms are as follows:
NOTE:
Includes additional information to
enable accurate and easy performance
of procedures.
IMPORTANT:
Includes additional information that
if not followed could lead to
hindered product performance.
Refer to the complete warranty for the country in
which the product will be used. A copy of the
written warranty is included with the product as
well as on the Holland Group web site
(www.thehollandgroupinc.com).
It may also be ordered directly from the address
shown on the back cover.
Used without the safety alert symbol,
indicates a potentially hazardous
situation which, if not avoided, may
result in property damage.
Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury.
Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
2
XL-MS175 Rev. C
Page 31
LOCATE HANGER BRACKETS (ALL STYLES) ON TRAILER FRAME
IMPORTANT: Frame surface where hanger
brackets are to be attached must be clean and
free of any surface rust. Use wire brush or
light-duty grinder to clean surface.
NOTE: The hanger bracket location instructions
on this page are to be used for all 3 hanger
bracket styles; under mount, flange mount and
straddle mount. After the hanger brackets have
been properly located and tack welded to the
trailer frame, proceed to Page 3 for Under Mount,
Page 4 for Flange Mount or Page 5 for Straddle
Mount installation instructions.
2. Position hanger brackets on frame according
to location marks determined in Step 1.
Position and tack weld all hangers in position
and double check dimensions before
completing welding of hangers (Figure 1,
Figure 2 and Figure 3).
1. Identify and mark hanger bracket locations
on bottom of trailer frame referencing the
dimensions provided in Figure 1 (single axle)
or Figure 2 (tandem axle) or Figure 3 (triple
axle). Hanger spacing is always measured
from center line to center line of hanger
(Figure 1). The front and rear hangers are
always located an equal distance from the
center hanger and should not vary from
dimension shown more than plus or minus
1/16˝. Hangers must be located on both sides of
sub-frame in exactly the same distances from
front and rear of trailer frame. Hangers on one
side of sub-frame must not be in front of or
behind corresponding hangers on other side of
sub-frame by more than plus or minus 1/16˝.
3. DuraLite suspension hangers may be installed
with any low hydrogen welding process
compatible with high strength low alloy steel,
such as AWS A5.18 ER70xx, SMAW or flux
cored welding. Use a low hydrogen process for
all welds, including tack welds. Make sure the
weld process is compatible with the trailer
structure.
IMPORTANT: Hangers must be mounted in
proper alignment with one another and must
not be cocked or tilted in respect to the sub
frame mounting surface.
Figure 1 (Under mount style shown)
19˝
±1/16˝
36-1/2˝
Figure 2 (Under mount style shown)
24-1/2˝
19˝
43-1/2˝ (±1/16˝)
43-1/2˝ (±1/16˝)
Figure 3 (Under mount style shown)
19˝
24-1/2˝
24-1/2˝
49-3/4˝
49˝
43-1/2˝ (±1/16˝)
49-3/4˝
136-3/4˝
XL-MS175 Rev. C
43-1/2˝
REF
3
Page 32
INSTALL UNDER MOUNT STYLE HANGER BRACKETS
IMPORTANT: The under mount style hanger
brackets must be located on the trailer frame to
match the axle spring center (Figure 4).
2. Add diagonal braces between the front, center
and rear hangers and the frame of the trailer
(Figure 4).
1. Install a 11⁄4 inches schedule 40 pipe or 1.66
OD x .109 standard mechanical tubing
through the front and center hangers. The
pipe brace should be 6 inches longer that the
spring centers. Tack weld the pipe brace in
place (Figure 4).
3. Check that all components are located in the
correct position. Weld the suspension hangers
in place as shown in Figures 5a, 5b and 5c. Weld
the pipe braces and diagonal braces in place
as shown in Figure 4.
Figure 4
XX
DIAGONAL BRACES REQUIRED ON
FRONT, CENTER & REAR HANGERS
(Not Included)
XX
X
X
X
X
XX
X
X
X
XX
X
X
X
X
XXX
XX XX
XX
XX
X
XX
X
XX
XX
X
XX
XX
XX
XX
XX
X
XX
XX
3
16
TYP
1-1/4˝ PIPE – SCHEDULE 40
or 1.66 OD x .109 TUBING
(Not Included)
X
X
X
X
XXXXX
XXXXX
X
X
X
X
X
X
WELD TUBE INSIDE WITH 3/4 WELDS ON THE HORIZONTAL CENTER
1 3
8 4
1 3
8 4
3
4
3 LINE OF THE TUBE, AS SHOWN ON FRONT & CENTER HANGERS.
4
1 3
8 4
3
4
SPRING CENTERS (±1/16˝)
Figure 5b
Figure 5a
3
16
5-1/2
3
16
Stop welds 1/4"
from edge
XXXXXXXXXXXXXXXX
7-1/2
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXX
3-1/2
3
16
Stop welds 1/4"
from edge
XXXXXXXXXX
3
16
3-1/2
3-1/2
Figure 5c
3
16
Stop welds 1/4"
from edge
4-1/2
XXXXXXXXXXXXXX
XXXXXXXXX
3
16
3-1/2
4
XL-MS175 Rev. C
Page 33
INSTALL FLANGE STYLE HANGER BRACKETS
1. Install a 11⁄4 inches schedule 40 pipe or 1.66
OD x .109 standard mechanical tubing
through the front and center hangers. The
pipe brace should be 6 inches longer that the
spring centers. Tack weld the pipe brace in
place (Figure 4).
3. Check that all components are located in the
correct position. Weld the suspension hangers
in place as shown in Figures 5a, 5b and 5c. Weld
the pipe braces and diagonal braces in place
as shown in Figure 4.
2. Add diagonal braces between the front, center
and rear hangers and the frame of the trailer
(Figure 4).
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
X
X
X
XX
X
X
X
XX
X
X
X
X
XX
DIAGONAL BRACES REQUIRED ON
FRONT, CENTER & REAR HANGERS
(Not Included)
XX
XX
XX
XX
XX
XX
XX
Figure 4
TYP
3
16
X
X
X
X
XXXXX
XXXXX
X
X
X
X
X
X
WELD TUBE INSIDE WITH 3/4 WELDS ON THE HORIZONTAL CENTER
1 3
8 4
1 3
8 4
3
4
3 LINE OF THE TUBE, AS SHOWN ON FRONT & CENTER HANGERS.
4
1 3
8 4
3
4
SPRING CENTERS (±1/16˝)
Figure 5a
Figure 5b
3
16
XXXXXXXXX
XXXXXXXXXXX
XXXXXXX
X
XXXXXXXXXXXX
XXXXXXXXXX
XX
XX
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXX
X
XX
XXXXXXXXXXXX
XXXXXXXXXX
XX
XX
XXXXXXXX
X
XXXXXXXXXXXXXXXXXX
XX
XXXXXXXXXXX
3
16
XXXXXXX
Figure 5c
XXXXXXXX
X
XXXXXXXXXXX
X
XX
XX
XXXXXXXXXXXXXXXXXXX
XL-MS175 Rev. C
XXXXXXXXXXXXX
XXXXXXXXXXX
3
16
XXXXXXX
5
Page 34
INSTALL STRADDLE STYLE HANGER BRACKETS
1. Install a 11⁄4 inches schedule 40 pipe or 1.66
OD x .109 standard mechanical tubing
through the front and center hangers. The
pipe brace should be 6 inches longer that the
spring centers. Tack weld the pipe brace in
place (Figure 4).
2. Check that all components are located in the
correct position. Weld the suspension hangers
in place as shown in Figure 5a, 5b and 5c. Weld
the pipe braces in place as shown in Figure 4.
Figure 4
WELD TUBE INSIDE WITH 3/4 WELDS
1
8
1 3
8 4
3
4
3
4
ON THE HORIZONTAL CENTER LINE OF THE TUBE,
AS SHOWN ON FRONT & CENTER HANGERS.
3
4
X
X
X
X
X
X
X
X
X
X
X
X
1 3 3
84 4
1 3 3
8 4 4
SPRING CENTERS (±1/16˝)
Figure 5
Figure 5b
3
16
Figure 5c
BEGIN
WELDS HERE
WELD NO.1
WELD NO. 2
TACK WELD 4 PLCS
PER HANGER
TYP 2 PLCS PER HANGER
(WELDS MUST BE CONTINUOUS DO NOT STOP AND RESTART)
BEGIN
WELDS HERE
3
16
TIE THIS
WELD INTO
WELD #2
ALL VERTICAL WELDS ARE
BEVEL WELDS INSTEAD OF
FILLETS AND FLUSH
AS SHOWN.
C
C
WELD NO. 3
SECTION C-C
TYP 2 PLCS PER HANGER
(WELDS MUST BE CONTINUOUS DO NOT STOP AND RESTART)
TYP 12 PLCS
6
XL-MS175 Rev. C
Page 35
WELD AXLE SEATS TO AXLE(S)
Figure 6 Proper Bottom Plate to Axle Fit
IMPORTANT: The axle seats and bottom plates
that are welded to the axle are compatible with
all low hydrogen welding processes suitable for
welding to steel axles.
NOTE: See below for underslung axle style
instructions.
OVERSLUNG AXLE STYLE
1. The axle seats should be located on the spring
centers within ±1/16˝. The axle seats should
be the same distance from the center of the
axle within the same tolerance. The camshaft
should be oriented per the axle manufacturers
specification. (NOTE: When the cams are
forward, the cam must be below the
horizontal centerline when axle seats of 2˝ or
shorter height are used.)
INCORRECT
NOT
ACCEPTABLE
Figure 7 Axle Weld Specifications
XXXXX
XXXXXXXXXXXXXX
XXXXXXXXXXXXXX
XX
XXX
XXX
XXXXX
X
XX
XXXXXXXXXXXXXXXXXXXXXXXXX
XXX
XXX
.50 TYP
XXX
XXXX
XXX
.50 TYP
XXXX
1.00
XXXXX
X
XX
XXXX
1/4
XX
2.75˝
NO WELD
XX
X
TYP
XXXX
XX
1.50˝
NO WELD
XXXX
XX
XX
XX
1.50˝
NO WELD
XX
2. Clamp the axle seats and
bottom plates to the axle.
Check that any gap between
the axle seat riser and the axle,
and the bottom plate and the
axle does not exceed 1/8˝
(Figure 6). If a greater gap is
present, these parts may be
clamped to the axle or adjusted
to fit by grinding the axle seat.
Using the axle manufacturer’s
recommendations, weld the
axle seats and bottom plates to
the axles (Figure 7).
CORRECT
AXLE BOTTOM PLATE
MUST CONTACT AXLE
AS SHOWN
2.75˝
NO WELD
Figure 8 Proper Axle Seat to Axle Fit
UNDERSLUNG AXLE STYLE
1. The axle seats should be located on the spring
centers within ±1/16˝. The axle seats should
be the same distance from the center of the
axle within the same tolerance. The camshaft
should be oriented per the axle manufacturers
specification. (NOTE: When the cams are
forward, the cam must be below the
horizontal centerline when axle seats of 2˝ or
shorter height are used.)
INCORRECT
NOT
ACCEPTABLE
Figure 9 Axle Weld Specifications
2.75"
NO
WELD
XL-MS175 Rev. C
1
4
XXXXXX
XXXXXXXXXXXXXXXXXXXXXXX
1.00
XXXXXX
X
X XX
XX
TYP
X XXX
2. Clamp the axle seats to the
axle. Check that any gap
between the axle seat riser
and the axle does not exceed
1/8˝ (Figure 8). If a greater
gap is present, the axle seats
may be clamped to the axle
or adjusted to fit by grinding.
Using the axle manufacturer’s
recommendations, weld the
axle seats to the axles (Figure 9).
CORRECT
AXLE SEAT MUST CONTACT
AXLE AS SHOWN
2.75"
NO
WELD
7
Page 36
ASSEMBLE TORQUE ARMS AND LEAF SPRINGS
OVERSLUNG AXLE STYLE
Figure 10a
Figure 10
Proceed to Page 8 for Underslung axle style instructions.
NOTE: It is recommended, but not required, to
install the fasteners with the nuts on the outside
(closest to tires). Lubrication may be used on all
threaded fasteners, but is not required unless the
fasteners have minor surface rust.
U-bolts
U-bolt torque
sequence
(275 – 300 ft. lbs.)
Install Torque Arms and Springs
1. Install the spring liner supplied with the
springs, on top of the springs. Place the springs
on top of the spring seats on the axle (Figure 10).
Place the top plate on top of the spring. Install
the springs on the axles with the appropriate Ubolts, nuts and washers. The U-bolts will fit into
the detents stamped into the top plate (Figure 10).
The U-bolt threads may be lubricated before
tightening the U-bolts.
IMPORTANT: On tandem axle suspensions the
big hook end of the spring should be arranged
to fit in the equalizer (Figure 11a). On single axle
suspensions it should point to the rear (Figure 11).
Arrange the springs so that they are on the
correct centers ±.03 inches and perpendicular
to the axle.
2. Tighten the U-bolts to 275 to 300 foot pounds of
torque using an alternating pattern (Figure 10a).
Check the spring centers and adjust if necessary.
Top
Plate
Spring
Liner
Small
Hook
Big Hook
End of
Spring
Figure 11
Spring Retainer Bolts & Spacers
35 – 50 ft. lbs. torque
Big
Hook
Small
Hook
DO NOT directly strike the
springs with a steel hammer; use a rubber hammer
or wooden block to avoid damaging the springs.
Central
Equalizer
3. Install the axles with springs into the
suspension hangers. Install the 5/8 inch spring
retainer bolts and spacers in the front and rear
hangers, and the equalizer on tandem axles to
hold the springs in place. Tighten these 5/8
inch bolts to 35 to 50 foot pounds (Figure 11).
DO NOT overtighten as this
may damage the spacers.
4. Install the torque arms between the hangers
and the spring seats on the axles. It is
recommended that the adjustable torque
arms be installed on the road side and the
fixed (cast) torque arms be installed on the
curb side (Figure 12). Install the 7/8 inch nuts
and bolts to secure the torque arms in place
and torque to 275 to 300 foot pounds (Figure 12).
5. With the suspension installed, check that
there is (1/8˝ ± 3/32˝) clearance between the
springs and the sides of the hangers and that
all the springs are contacting the bottoms of
the hangers (Figure 12a).
6. Install the decal, XB-SP0001 in clear view on
the road side of the vehicle as close as
practical to the suspension.
Big
Hook
Big
Hook
Figure 11a
Figure 12
7/8˝ Torque Arm Bolts
275 – 300 ft. lbs. torque
Adjustable torque arm
to road side
Fixed (cast) torque
arm to curb side
1/8 ± 3/32 Gap on both
sides of the spring
Figure 12a
8
XL-MS175 Rev. C
Page 37
ASSEMBLE TORQUE ARMS AND LEAF SPRINGS
UNDERSLUNG AXLE STYLE
Figure 10a
Figure 10
NOTE: It is recommended, but not required, to
install the fasteners with the nuts on the outside
(closest to tires). Lubrication may be used on all
threaded fasteners, but is not required unless the
fasteners have minor surface rust.
U-bolt
U-bolt torque
sequence
Install Torque Arms and Springs
1. Install the spring liner supplied with the
springs, on top of the springs. Position the
springs under the spring seats on the axle
(Figure 10). Position the bottom plate under the
spring. Assemble the springs to the axles with
the appropriate U-bolts, nuts and washers.
The U-bolt threads may be lubricated before
tightening the U-bolts.
IMPORTANT: On tandem axle suspensions
the big hook end of the spring should be
arranged to fit in the equalizer (Figure 11a). On
single axle suspensions it should point to the
rear (Figure 11). Arrange the springs so that
they are on the correct centers ±.03 inches and
perpendicular to the axle.
(275 – 300 ft. lbs.)
Spring
Liner
Big Hook
End of
Spring
Small
Hook
Bottom
Plate
Figure 11
Spring Retainer Bolts & Spacers
35 – 50 ft. lbs. torque
2. Tighten the U-bolts to 275 to 300 foot pounds of
torque using an alternating pattern (Figure 10a).
Check the spring centers and adjust if necessary.
Big
Hook
Small
Hook
DO NOT directly strike the
springs with a steel hammer; use a rubber hammer
or wooden block to avoid damaging the springs.
Central
Equalizer
3. Install the axles with springs into the
suspension hangers. Install the 5/8˝ spring
retainer bolts and spacers in the front and rear
hangers, and the equalizer on tandem axles to
hold the springs in place. Tighten these 5/8˝
bolts to 35 to 50 foot pounds (Figure 11).
DO NOT overtighten as this
may damage the spacers.
Big
Hook
Big
Hook
Figure 11a
Figure 12
4. Install the torque arms between the hangers
and the bottom plates on the axles. It is
recommended that the adjustable torque
arms be installed on the road side and the
fixed torque arms be installed on the curb side
(Figure 12). Install the 7/8˝ nuts and bolts to
secure the torque arms in place and torque to
275 to 300 foot pounds (Figure 12).
7/8˝ Torque Arm Bolts
275 – 300 ft. lbs. torque
5. With the suspension installed, check that
there is (1/8˝ ± 3/32˝) clearance between the
springs and the sides of the hangers and that
all the springs are contacting the bottoms of
the hangers (Figure 12a).
Adjustable torque arm
to road side
6. Install the decal, XB-SP0001 in clear view on
the road side of the vehicle as close as
practical to the suspension.
Fixed (cast) torque
arm to curb side
1/8 ± 3/32 Gap on both
sides of the spring
Figure 12a
XL-MS175 Rev. C
9
Page 38
AXLE ALIGNMENT INSTRUCTIONS
After suspension installation, and periodically
thereafter, the axles should be aligned to insure
proper tracking of the trailer and to avoid excessive
tire wear. For best results, the use of axle and
kingpin extensions is recommended.
Figure 13 Axle Alignment
1. When aligning axles, the suspension should be
in a natural relaxed state, free of any “binds.”
Before taking measurements, and to achieve
this relaxed condition, make sure the vehicle is
unloaded. Then roll it back and forth on a level
floor. Avoid brake application (including the
parking brake). Vehicle must be level from sideto-side, as well as from front-to-rear. The upper
coupler should be at the ride height.
B
A
E
2. Maintain the air system at normal operating
pressure (greater than 80 psi). DO NOT drain
the air tank.
3. Check that the ends of the springs are
contacting the bottom wear pads in all hangers.
D
C
4. Loosen the 5/8˝ clamp bolts on the adjustable
torque arms.
5. Align the front axle with the kingpin by
adjusting the front adjustable torque arm.
6. Align the rear axle with the front axle in the
same manner.
A = B ± 1/8˝ (3mm)
7. Tighten the clamp bolts on the adjustable
torque arm and track rod ends to 80 – 95 ft. lbs.
of torque.
C = D ± 1/16˝ (1.6mm)
E = ≤ 1/4˝ (6mm)
FINAL INSPECTION
1. Verify that the hanger brackets to mounting subframe and axle seat welds have been completed
per specifications (Figures 5a, 5b and 5c).
Figure 14 (Overslung axle style shown)
2. Check all suspension fastener connections for
proper torque settings (Figures 15 and 16).
4-1/2˝
3. Check adjustable torque arm clamp nuts to be
certain that 85 – 95 ft. lbs. torque is maintained.
Suspension
Mounting
Height
4. Check for proper suspension mounting
height. Adjust with axle seat shims if
necessary (Figure 14).
5. Check for proper 41⁄2˝ vertical tire clearance
(Figure 14). Check for lateral tire clearance.
6. Verify that the front axle alignment does not
exceed a maximum variation of 1/8 ˝ kingpin
to front axle and a maximum variation of
1/16˝ axle to axle on any additional axles
(Figure 13).
Check for proper
tire clearance
Adjustable
Torque Arm
Clamp Nuts
85 – 95 ft. lbs.
10
XL-MS175 Rev. C
Page 39
MAINTENANCE RECOMMENDATIONS
DuraLite® suspensions, by design, require a
minimum of maintenance. However,
suspensions in “over-the-road” operations
require periodic checks to be certain of continued
trouble free performance. We recommend, after
an initial loaded run-in period of at least 1,000
miles, that you recheck the trailer alignment and
correct if required. Routine visual inspections
and appropriate maintenance of suspension is
required every six months or 25,000 miles,
whichever comes first. Furthermore, all fasteners,
especially U-bolts, should be retorqued to the
following specifications.
1. Check 3/4-16 U-bolt nuts to be certain that
275–300 ft. lbs. torque is maintained.
2. Check 1-14 equalizer bolt to be certain that
450–500 ft. lbs. torque is maintained
3. Check 7/8-14 torque arm bolts to be certain
that 275–300 ft. lbs. torque is maintained.
4. Check adjustable torque arm clamp nuts to
be certain that 85–95 ft. lbs. torque is
maintained.
5. Check spring retainer hold down bolts to be
certain that 35–50 ft. lbs. torque is
maintained.
Failure to maintain proper fastener torque values
could result in suspension component damage
and/or possible loss of vehicle control.
Figure 15 Overslung Axle Model
➋
➎
➋
➎
➎
➍
➌
➊
Figure 16 Underslung Axle Model
➎
➌
➍
➊
XL-MS175 Rev. C
11
Page 40
LEAF SPRING SELECTION
Holland DuraLite suspensions are rated at 22,400 pounds GAWR (Gross Axle Weight Rating) with one, two or three
leaf springs, and 24,000 pounds GAWR with heavy-duty three leaf springs. (Holland does not supply springs.)
The following widely available leaf springs are suitable for use with DuraLite suspensions:
TABLE 1
SPRING TYPE
Low Arch
Medium Arch
High Arch
SINGLE LEAF
SP0363
–
SP0360
TWO LEAF
SP0326
SP0325
SP0324
THREE LEAF
SP0356
SP0355
SP0354
THREE LEAF HD
SP9365-01
–
SP0365
MOUNTING HEIGHT SPRING SEAT SELECTION
IMPORTANT: It is the installer’s responsibility to select the correct mounting height. There should be 41⁄2˝ of
vertical tire clearance with an unloaded vehicle. In addition, clearance must be provided at the side front and
rear of the tires to prevent tire contact during suspension movement. The mounting heights, shown below, are
nominal values and may vary due to variations in the leaf springs and other components.
CONVENTIONAL (OVERSLUNG) MOUNTING HEIGHT
TABLE 2
SPRING
TYPE
SPRING SEAT AND U-BOLT KIT
SPRING SEAT
HEIGHT
Low Arch
Medium Arch
High Arch
3/4˝
SPK0031
13-3/4˝
14-1/2˝
16˝
1-1/4˝
SPK0032
14-1/4˝
15˝
16-1/2˝
1-3/4˝
SPK0033
14-3/4˝
15-1/2˝
17˝
2-1/4˝
SPK0034
15-1/4˝
16˝
17-1/2˝
2-3/4˝
SPK0035
15-3/4˝
16-1/2˝
18˝
3-1/4˝
SPK0036
16-1/4˝
17˝
18-1/2˝
3-3/4˝
SPK0037
16-3/4˝
17-1/2˝
19˝
IMPORTANT: Mounting heights should not exceed 17-1/2˝ for best performance. Mounting height should
provide a minimum of 4-1/2˝ of tire clearance with an empty vehicle. Table 2 applies to under mount or flange
mount hangers on a multi-axle suspension. For single axle suspensions, subtract 1/2˝ from the above heights.
For straddle mount hangers, subtract 1/2˝.
UNDERSLUNG MOUNTING HEIGHT
TABLE 3
SPRING
TYPE
UNDER SLUNG MOUNTING HEIGHT
SPRING SEAT
HEIGHT
Low Arch
Medium Arch
High Arch
1/4˝
SPK0045
4-1/2˝
5-1/2˝
7˝
1-1/4˝
SPK0046
–
5˝
6-1/2˝
1-3/4˝
SPK0047
–
4-1/2˝
6˝
2-1/4˝
SPK0048
–
–
5-1/2˝
IMPORTANT: Mounting heights less than 4-1/2˝ are not suggested due to lack of clearance between the axle
and trailer frame. Mounting height should provide a minimum of 4-1/2˝ of tire clearance with an empty
vehicle. Sufficient clearance should be provided for axle movement. Table 3 applies to under mount or flange
mount hangers with a multi-axle suspension. For single axle suspensions, subtract 1/2˝ from the above heights.
For straddle mount hangers, subtract 1/2˝ from the above heights.
HOLLAND USA, INC.
1950 Industrial Blvd. • P.O. Box 425
Muskegon, MI 49443-0425
Phone 888-396-6501 • Fax 800-356-3929
www.thehollandgroupinc.com
Copyright © October 2004 • The Holland Group, Inc.
Holland USA, Inc. Facilities:
Holland International, Inc.
Holland Hitch of Canada, Ltd.
Holland Equipment, Ltd.
Holland Hitch Western, Ltd.
Dumas, AR
Holland, MI
Muskegon, MI
Holland, MI
Phone:
616-396-6501
Fax:
616-396-1511
Woodstock, Ontario • Canada
Phone:
519-537-3494
Fax:
800-565-7753
Norwich, Ontario • Canada
Phone:
519-863-3414
Fax:
519-863-2398
Surrey, British Columbia • Canada
Phone:
604-574-7491
Fax:
604-574-0244
Warrenton, MO
Wylie, TX
Ph: 888-396-6501 Fax: 800-356-3929
12
XL-MS175 Rev. C
Page 41
RL SERIES
MAINTENANCE
MANUAL
RL Series Top Mount Suspensions for
Fixed Frame Trailer Applications
Maintenance Manual
For Parts Information, refer to
Parts List (Part No. XL-AR405-01).
XL-AR406 Rev C
Page 42
CONTENTS
Page
Page
Introduction...................................................................................2
Pre-Operational Checklist .............................................................7
Warranty ........................................................................................2
Torque Specifications ....................................................................8
Notes, Cautions, and Warnings ......................................................2
Standard Air Control System .........................................................9
Serial Number Tag Information.....................................................3
Height Control Valve Information ..........................................10-12
Model Identification ......................................................................3
Pressure Protection Valve............................................................13
Model Nomenclature.....................................................................3
Axle Alignment ............................................................................14
How to Identify Your Suspension Model......................................4
Component Replacement Instructions ......................................15
Determining Ride Height ..............................................................5
Troubleshooting ..........................................................................19
Service Repair Kits (see XL-AR405-01, page 5) ............................5
Contact Information....................................................................20
Operation and Maintenance Instructions.....................................6
INTRODUCTION
This manual provides you information necessary for the care,
maintenance, inspection, and safe operation of
SAF-HOLLAND’s RL Series trailer air suspensions.
The SAF-HOLLAND Trailer Air Suspension is designed and
engineered to provide trouble-free service. In the event of
minor breakdown, such as a loss of air in the air springs, there
are safety features designed into the suspension that will allow
the vehicle to be driven CAUTIOUSLY at slow speed, to the
nearest service facility.
This suspension uses air drawn from the tractor air system to
pressurize the air springs.The height control valve regulates
the air pressure required for varying loads and maintains the
design ride height.This suspension can provide a cushioned
ride throughout the load range, from empty to fully loaded.
The suspension also provides excellent side-to-side and axleto-axle loading which helps equalize and control braking.
NOTES, CAUTIONS,
AND WARNINGS
You must read and understand all of the safety procedures
presented in this manual before starting any work on
the suspension.
Proper tools must be used to perform the maintenance and
repair procedures described in this manual. Many of these
procedures require special tools.
Failure to use the proper equipment could result in personal
injury and/or damage to the suspension.
Safety glasses must be worn at all times when
performing the procedures covered in this manual.
Throughout this manual, you will notice the terms “NOTE,”
“IMPORTANT,”“CAUTION” and “WARNING” followed by
important product information. So that you may better
understand the manual, those terms are as follows:
NOTE:
WARRANTY
Refer to the complete warranty for the country in which the
product will be used.A copy of the written warranty is
included with the product as well as on the SAF-HOLLAND
Web Site (www.safholland.us)
Includes additional information to
enable accurate and easy performance
of procedures.
IMPORTANT: Includes additional information that
if not followed could lead to hindered
product performance.
It may also be ordered directly from the address shown on the
back cover.
Used without the safety alert symbol,
indicates a potentially hazardous situation
which, if not avoided, may result in
property damage.
Indicates a potentially hazardous situation
which, if not avoided, may result in minor
or moderate injury.
Indicates a potentially hazardous situation
which, if not avoided, could result in death
or serious injury.
XL-AR406 Rev C
2
Page 43
SERIAL NUMBER TAG INFORMATION
Model Identification
Model Nomenclature
The RL Series Suspension Serial Tag is normally located on the
roadside frame bracket (FIGURE 1).
The sample tag shown below will help you interpret the
information on the SAF-HOLLAND, USA, Inc. serial number tag.
The model number is on the first line along with the suspension
capacity.The second line contains the parts list number and
serial number (FIGURE 2).
NOTE: This manual applies to the suspension series or the
models listed on the front cover. However, we urge
you to determine your specific model number,
write that information below and refer to it when
obtaining information or replacement parts.
FIGURE 2
Serial Number Tag
NOTE: Refer to the serial number tag attached to the frame
bracket for information.
HOLLAND USA, INC.
Model Number _______________________________
PART NO.
11090---
Parts List Number_____________________________
Serial Number ________________________________
CONSULT SPECIFICATION FOR CAPACITY AND RECOMMENDED APPLICATION.
In Service Date _______________________________
FIGURE 1
CAPACITY (LBS)
25,000
SERIAL NO.
MODEL NO.
RL-250-16
PART NO. 938 00 269
MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING U.S. PATENTS:
5,639,110
5,588,665
4,595,216
4,615,539
5,354,091
5,393,096
5,088,763
5,083,812
5,203,585
5,470,096
5,201,898
5,288,100
6,241,266
5,924,712
4,838,578
6,073,946
6,062,578
6,116,626
6,328,322
4,838,566
6,398,236
4,871,188
NOTE: Some models have an additional designation after the
ride height.
Example: RL-230-16-HMS (see below)
Serial Number Tag Location
RL-250 - 16 - H M S
SERIAL NUMBER TAG
LOCATED ON ROADSIDE
FRAME BRACKET
Special Features
HMS - Hanger Mounted Shocks
SBF - Shock Below Frame
SS - Single Stud Air Spring
OFS - Offset Stud Air Spring
Ride Height
12˝ (305mm)
13˝ (330mm)
14˝ (356mm)
15˝ (381mm)
16˝ (406mm)
17˝ (432mm)
Axle Capacity &
Suspension Series
22,500 RL-228 Series
23,000 RL-230 Series
25,000 RL-250 Series
30,000 RL-300 Series
XL-AR406 Rev C
3
Page 44
SERIAL NUMBER TAG INFORMATION
Model Nomenclature
continued
To correctly identify the model requiring replacement parts,
check the serial tag for any special feature designations (in bold
below, also FIGURE 3). Identify suspension characteristics by
breaking down each part number as shown in the examples
below:
Example 1:
RL-230-17-3-SS
- 230 = 23,000 lbs. axle capacity
- 17 = 17˝ ride height
- 3˝ = axle travel (up)
- SS = Single stud air spring
Example 2:
RL-230-15-4-HMS - 230 = 23,000 lbs. axle capacity
- 15 = 15˝ ride height
continued
Identifying an RL-250 Series: Due to many variations within the
RL Series family, closer inspection may be required to determine
which model you have.The RL-250 standard suspension is shown
below in FIGURE 3. If closer examination is required, check the
shock absorber part number, which will be located at the base of
the shock to assist in determining the ride height.
Identifying an RL-300 Series: Due to many variations and close
resemblance to the RL-250 Series suspension, the RL-300 Series
suspension requires closer examination by checking the shock
absorber part number, which will be located at the base of the
shock to assist in determining the ride height.
To correctly identify your specific model requiring replacement
parts, proceed (1) by identifying the style of equalizing beam
(FIGURE 3), and (2) by identifying the shock’s mounting orientation
and part number.
IMPORTANT: If you find you need further assistance with
identifying your specific suspension model,
reference XL-AR405-01, RL Series - Parts List.
- 4˝ = axle travel (up)
- HMS = Hanger Mounted Shock
(only available with models having 4˝
of axle travel)
FIGURE 3
Equalizing Beam Styles
Example 3:
RL-250-17-3-SBF - 250 = 25,000 lbs. axle capacity
RL-228
- 17 = 17˝ ride height
- 3˝ = axle travel (up)
- SBF = Shock Below Frame
Example 4:
RL-300-15-OFS
PIVOT BUSHING
- 300 = 30,000 lbs. axle capacity
AXLE BUSHINGS
- 15 = 15˝ ride height
- OFS = Offset Stud Air Spring
(only available with models having 14˝,
15˝, and 16˝ ride heights)
RL-230
How to Identify Your Suspension Model
When ordering replacement parts, it is important to identify
the correct suspension model by noting any special feature
designation. Refer to special feature designation at the end of the
model number below the serial number tag on page 3.
If the serial number tag is missing,suspension model verification can
be achieved by noting the characteristics of each suspension series.
Identifying an RL-228 Series: The equalizing beam has a
distinctive shape at the air spring mounting plate area at the rear
of the beam (see FIGURE 3).
PIVOT BUSHING
AXLE BUSHINGS
RL-250/300
Identifying an RL-230 Series: The equalizing beam has a
distinctive shape (see FIGURE 3).
PIVOT BUSHING
AXLE BUSHINGS
XL-AR406 Rev C
4
Page 45
SERVICE REPAIR KITS (SRK)
Common Replacement Parts Come in Service
Repair Kits (SRKs)
Pivot and Axle Connection Rubber Bushings
To simplify ordering the correct number of common replacement
parts, Service Repair Kits were formed to offer you proper
components having correct quantities, making maintenance
easier by doing tasks correctly the first time.
The RL Series suspension provides Service Repair Kits (SRK’s)
for the replacement of pivot/axle connections (FIGURE 4).
IMPORTANT: For easier field replacement of RL Series frame
brackets the EZ-Align (non-welded) style
frame bracket must be used to replace
a welded alignment style frame bracket. Kit
includes all pivot connection components,
except the pivot bushings.
IMPORTANT: Check the head of the pivot bolt. Bolts have
1051, 1055 or 1069 on the bolt head, reducing
the number of possible kits associated with your
type of bolt (see Pivot and Axle Connection
Service Repair Kit Chart on page 5 of XL-AR405-01).
IMPORTANT: When replacing the rubber bushings at
these connections be sure the proper
SAF-HOLLAND SRK (Service Repair Kit) is
used as they contain all necessary parts to
service one axle. It may be advantageous to
service both pivot and axle connections at the
same time. (See Pivot and Axle Connection
Service Repair Kit Chart on page 5 of XLAR405-01.)
NOTE: The SAF-HOLLAND Bushing Service Tool, Part No.
505 44 012 (FIGURE 5), is available to ease removal
and replacement of bushings. Contact your
SAF-HOLLAND distributor or Parts List for details.
IMPORTANT: It is recommended that the vehicle be unloaded
before beginning service procedures.
FIGURE 5
Bushing Service Tool
FIGURE 4
PART NO. 505 44 012
Pivot and Axle Connections
FRAME
BRACKET
PIVOT
CONNECTION
AXLE CONNECTIONS
XL-AR406 Rev C
5
Page 46
OPERATION AND MAINTENANCE INSTRUCTIONS
The RL Series Trailer Air Suspension models covered in this
manual are controlled by a single height control valve (standard
air control system).When properly adjusted, the height control
valve will maintain a constant ride height by controlling the air
pressure in the air springs to support the load being carried.
The trailer air pressure must be maintained in excess of 75 psig
(5.2 bars) before operation. 75 psig (5.2 bars) is required to open
the Air Pressure Protection Valve, which maintains safe air brake
pressure in the event of an air loss in the suspension system.
In the event that an air loss should occur, it is recommended the
Height Control Valve Linkage be disconnected to assure all air
springs are completely deflated.The trailer can be temporarily
operated on the air spring’s internal rubber bumpers, which
carry the load if there is tire clearance. In the event of
inadequate air pressure, operate the trailer CAUTIOUSLY, at a
slow speed, to the nearest place of repair.To deflate the air
suspension, refer to page 15, step 2.
Routine Physical Inspections
Every 100,000 Miles* (160,000 km) or 1 year,
whichever comes first
When servicing vehicle brake system, inspect suspension
components per pre-operational checklist on page 7.Also check
all other suspension components for any sign of damage,
looseness, torque loss, wear or cracks. Repair, tighten or replace
damaged part(s) to prevent equipment breakdown.
Visual Inspection Procedure
*IMPORTANT: A schedule for physical and visual
inspections should be established by the
operator based on severity of operation or
damage to the vehicle could occur.
IMPORTANT: During each pre-trip and safety inspection
of the vehicle, a visual inspection of the
suspension should be done or damage to
the vehicle could occur.
Before transporting the vehicle to a service center, check tire
clearances. DO NOT operate the vehicle if any tire(s) is rubbing
the vehicle.
Tire clearance must be maintained
between tires and the nearest point of
contact on the suspension or vehicle. Fire or loss of vehicle
control could occur if clearances are not maintained which,
if not avoided, could result in death or serious injury.
Visually check for:
•
Bolt movement – loose dirt, rust or metal wear around bolt
head and nut.
IMPORTANT
•
Air springs – clearances, wear damage, and
proper inflation.
ROUTINE MAINTENANCE AND DAILY INSPECTION
•
Shock absorbers – leaking or damaged.
Daily Inspection
•
Cracked parts or welds.
Daily or before each trip, check the suspension to be sure it is
fully operational.Visually inspect air springs for sufficient and
equal pressure and to see that suspension is set at proper ride
height. See page 10 for ride height measurement and re-setting
instructions. Service as necessary.
Initial 5,000 Mile (8,000 km) Service Inspection
1.
Suspension ride height (underside of frame to centerline
of axle) MUST BE WITHIN ±1/4˝ OF RECOMMENDED
DESIGN HEIGHT. See page 10 for instructions on
measuring ride height.
An improperly set ride height could
result in suspension component
damage and/or poor vehicle ride performance.
2.
After initial 5,000 miles (8,000 km) of service, inspect bolts
and nuts at the pivot and axle connections to assure they are
properly torqued. Check all other nuts and bolts for proper
torque. Re-torque as necessary thereafter.
3.
With vehicle on level surface and air pressure in excess
of 75 psig (5.2 bars), all air springs should be of sufficient
and equal firmness.
NOTE: Check all air control system fittings for
air leaks, by applying a soapy water
solution and checking for bubbles at all
air connections and fittings.
XL-AR406 Rev C
6
Page 47
PRE-OPERATIONAL CHECKLIST
Prior to placing unit in service, check
the following items:
8.
Visually check the welding of all axle adapters to axles —
1/2˝ (13mm) minimum fillet weld required (FIGURE 6).
Failure to chock tires prior to beginning
maintenance could allow vehicle
rollaway which, if not avoided, could result in death or
serious injury.
9.
Visually check the welding of all curbside fixed alignment pivot
connections on both sides of frame bracket (FIGURE 8).
1.
Build air pressure above 75 psig (5.2 bars).With the
vehicle shut off, check the system for air leaks.
2.
With the vehicle on a level surface and air supply pressure
in excess of 75 psig (5.2 bars), check the air springs for
equal firmness.
3.
Check the shock absorbers for proper installation.
The 3/4˝ shock absorber nuts must be torqued to
specifications (see TABLE 1 Torque Chart on page 8).
4.
The 1/2˝ and 3/4˝ air spring mounting nuts must be
torqued to specifications (see TABLE 1 Torque Chart
on page 8).
5.
Check for 1˝ (25mm) minimum clearance around the air
springs with vehicle loaded (FIGURE 6).
6.
The 11/8˝ axle connection nuts must be torqued to
specifications (see TABLE 1 Torque Chart on page 8).
7.
The suspension ride height should be within ±1/8˝ of the
recommended design height. See “Height Control Valve
Adjustment” on page 10 for the proper setting.
If welds are not present, weld the alignment plates
in-board and out-board of the frame bracket per
SAF-HOLLAND NS-65-07-CI specification—consult
SAF-HOLLAND publication XL-AR353-01— and as shown in
FIGURE 8.Weld all around with 5/16˝ (8mm) weld.
IMPORTANT: The EZ-Align design maintains proper
alignment under correct torque without
welding; DO NOT weld alignment blocks
(FIGURE 7).
NOTE: EZ-Align pivot connections (non-welded) are on
roadside and fixed alignment pivot connections
(welded) are on curbside. However, some
manufacturers use EZ-Align on both sides.
See page 14 for “EZ-Align (Non-welded) Connection
Axle Alignment” procedure.
10. A 11/8˝ pivot nut must be torqued to specifications
(see TABLE 2 Pivot Bolt Torque Chart on page 8).
continued
FIGURE 6
RL Series Suspension Pre-Operational Checklist Items
3
10
4
6
5
8
2
7
6
4
CL
XL-AR406 Rev C
7
Page 48
PRE-OPERATIONAL CHECKLIST
continued
TABLE 1
TABLE 2
Torque Chart
Pivot Bolt Torque Chart
SIZE
TORQUE
FT. LBS.
TORQUE
NM
3/4˝
150
203
11/8˝ (Axle Conn.)
800
1083
11/8˝ (Pivot Conn.)
See Table 2
1/2˝ - Air Spring
30 - 40
41 - 54
3/4˝ - Air Spring
40 - 45
54 - 61
BOLT SIZE
SOCKET SIZE
1/2˝
3/4˝
11/8˝
3/4˝
11/8˝
111/16˝*
IDENTIFIER
OLD PIVOT BOLT
Bolt Head
Marking
Color
*Deep Well Socket
IMPORTANT: Torque requirements listed are for clean
and lubricated threads.
Use of special lubricants with friction
modifiers, such as Anti-Seize or
Never-Seize, without written approval
from SAF-HOLLAND Engineering will
void warranty and could lead to
premature bolt failure or other
component issues.
FIGURE 7
EZ-Align (Non-welded) Axle Alignment
Silver
Black
Surface
Appearance
Dry
Wet – Oily
Torque
Specification
550 FT. LBS.
800 FT. LBS.
(745 Nm)
(1083 Nm)
DO NOT torque old pivot bolt to the new
torque specification of 550 ft. lbs. (745 Nm).
Pivot may loosen causing premature wear or fracturing of the
bolt and other suspension components that could result in a
loss of vehicle control and could cause serious injury or death.
DO NOT torque new pivot bolt to the
old torque specification of 800 ft. lbs.
(1083 Nm). Removal or loosening of pivot bolt for service,
repair, or axle alignment may become difficult if the new
bolt is torqued to 800 ft. lbs. (1083 Nm).
FIGURE 8
Welded Adjustable Axle Alignment
NON-WELDED STYLE SIDE VIEW
IMPORTANT:
The EZ-Align design
maintains proper
alignment under correct
torque without welding.
See page 14 for
“EZ-Align (Non-welded)
Connection Axle
Alignment” procedure.
NEW PIVOT BOLT
WELDED STYLE SIDE VIEW
Alignment Block
(with hidden collar)
pre-welded to frame
bracket (both sides) by
suspension manufacturer.
DO NOT cut weld.
ALIGNMENT BLOCK
MUST be welded all
around, both sides
of frame bracket.
Alignment Block
with D-shaped
hole. DO NOT weld
alignment block to
alignment collar on
frame bracket.
DO NOT weld pivot bolt
assembly to alignment collar
on frame bracket.
XL-AR406 Rev C
8
Page 49
STANDARD AIR CONTROL SYSTEM
The Air Control System shown (FIGURE 9) depicts a standard RL
Series tandem piping diagram.
The air control system of the RL Series suspension uses air
drawn from the tractor air system to pressurize the suspension’s
air springs.The suspension, working with the air control
system, provides optimum suspension performance only
when all air control system components are installed and
operating properly.
A pressure protection valve is attached to the air reservoir
and must be used to maintain proper air pressure. See page 13
for maintenance.
IMPORTANT: Air pressure protection valve maintains safe
brake pressure.Approximately 75 psig (5.2
bars) opens valve, 65 psig (4.5 bars) closes
valve (FIGURE 9).
The height control valve regulates the air pressure required for
varying capacities of load. It is critical to make sure the height
control valve is set at the proper suspension ride height (FIGURE
11). See pages 10-12 for height control valve detail.
FIGURE 9
Air Control System
Pressure Protection Valve –
For proper installation and
maintenance, see page 13.
AIR RESERVOIR
AIR SPRING
AIR SPRING
AIR SPRING
Height Control Valve –
For adjustment and
maintenance procedures,
see pages 10 and 11.
Height Control Valve Linkage –
For proper length and assembly,
see page 12.
AIR SPRING
Linkage Bracket
XL-AR406 Rev C
9
Page 50
HEIGHT CONTROL VALVE INFORMATION
Adjustment Procedure for a One HCV System
Failure to properly support suspension
during maintenance may allow
suspension to fall which, if not avoided, could result in
death or serious injury.
1.
FIGURE 12
Height Control Valve
INTAKE (UP)
CONTROL ARM
1/4˝ ADJUSTING
LOCK NUT
Prior to adjustment, the vehicle must be in an unladen
condition on a level floor and supported on a king pin stand
or coupled to a tractor (FIGURE 10). If supported with a
king pin stand, front of trailer must be supported at
operating height.
ADJUSTING BLOCK
EXHAUST (DOWN)
FIGURE 10
Trailer Supported at Fifth Wheel Height
EXHAUST
“OUT” TO
AIR SPRING
FIFTH WHEEL
OPERATING
HEIGHT
“IN” AIR SUPPLY
LOCATING PIN
“A” RIDE
HEIGHT
CL AXLE
4.
With the control arm in the center (neutral) position
(FIGURE 13), insert locating pin into the adjusting block and
bracket on the height control valve (FIGURE 12). Loosen the
1/4˝ adjusting lock nut located on the adjusting block
(FIGURE 12).This will allow the control arm to move up
and down approximately 1˝ (25mm).
5.
Reconnect the lower linkage, and torque to
30-40 in. lbs. (3.75-5 Nm).
6.
Retighten the 1/4˝ lock nut at the adjusting block to
30-40 in. lbs. (3.75-5 Nm).
7.
Remove locating pin inserted in Step 4, then raise vehicle to
remove the jack stands.
SUPPORT AT KING PIN
2.
Disconnect height control valve linkage to lower mounting
bracket (FIGURE 14, page 12), move control arm to “up”
(45°) position and hold for 10-15 seconds to raise vehicle
(FIGURE 12). Return control arm to center (neutral) position
(FIGURE 13).
FIGURE 11
Obtaining Proper Ride Height
“A”
RIDE
HEIGHT
Failure to properly support suspension
during maintenance may allow
suspension to fall which, if not avoided, could result in
death or serious injury.
NOTE: The height control valve may be used as an improvised
jack by disconnecting the linkage at the lower
bracket. Move control arm 45° to an “up” position to
raise vehicle and remove jack stands. Move control
arm 45° to “down” position, completely exhausting
system, then reconnect lower linkage, and torque to
30-40 in. lbs. (3.75-5 Nm).The suspension system will
return to and maintain the proper ride height.
NOTE: It may be necessary to shim jack stands to achieve
proper ride height.
3.
Place jack stands between the trailer frame and ground.
Place one stand on each side at proper ride height (FIGURE
11).With jack stands in position, move control arm to 45°
“down” position and lower vehicle and deflate all air from
air springs and system. Return control arm to center
(neutral) position and recheck for proper “A” ride height
(FIGURE 11).
XL-AR406 Rev C
10
Page 51
HEIGHT CONTROL VALVE MAINTENANCE
Height Control Valve Inspection
FIGURE 13
Height Control Valve Performance Check
IMPORTANT: DO NOT grease height control valve.
1.
Visually inspect the valve and linkage on a regular basis for
proper clearance, operation and adjustment.
2.
Dirt or foreign particles in the air line may harm the
internal workings of the valve. Even though it contains a
protective filter to eliminate foreign matter, normal air brake
system maintenance should be practiced.
3.
Drain moisture from air tank periodically. In severe cold
weather an air dryer and/or an alcohol evaporator is
recommended to avoid valve freezing and damage.
CENTER
(NEUTRAL)
POSITION
INTAKE
UP 45°
Height Control Valve Performance Check
IMPORTANT: Proper inspection can eliminate unnecessary
replacement of height control valve.
1.
Apply air system pressure in excess of 75 psig (5.2 bars).
2.
Disconnect lower connection of the link assembly from
mounting bracket (FIGURE 14).
3.
Move control arm up to 45° for 10-15 seconds –
air should flow to air spring(s) (FIGURE 13).
4.
Move control arm to center (neutral) position –
valve should shut off air flow (FIGURE 13).
5.
Move control arm down 45° for 10-15 seconds –
air should exhaust (FIGURE 13).
6.
Move control arm to center (neutral) position –
valve should shut off air flow.
7.
Valve is good if performance is as noted.
EXHAUST
DOWN 45°
IMPORTANT: If 75 psig (5.2 bars) air system pressure
cannot be achieved, check pressure protection
valve and vehicle air compressor to see if they
are operating properly.Also check the air lines
for obstructions caused by dirt particles,
foreign debris, ice, etc.
NOTE: If the valve does not perform correctly, replace
the valve.
8.
continued
Reconnect lower link assembly to mounting bracket and
torque to 30-40 in. lbs. (3.75-5 Nm).
XL-AR406 Rev C
11
Page 52
HEIGHT CONTROL VALVE MAINTENANCE
Check Height Control Valve Linkage for Proper
Length and Assembly
1.
With suspension set at proper ride height, determine length
of link assembly required (“A” Dim.) (FIGURE 15).This can
be achieved by measuring the distance from center line of
height control valve arm hole to center line of lower
connection bracket hole (FIGURE 14).
IMPORTANT: “A” measurement must be taken with
suspension set at proper ride height
(see FIGURE 11 on page 10).
FIGURE 14
Linkage Length
continued
4.
Assemble clamps, link ends and rods as shown
(FIGURE 15). Insert rod into link end equal distance both
ends, observing the minimum and maximum tolerance.
Be certain the link ends are aligned to each other
(FIGURE 15).
5.
With link ends properly aligned and link assembly at
required length, tighten clamps.
6.
Install link assembly.
IMPORTANT: 5/16˝ washers must be inserted between nut
and control arm or axle tab bracket, 5/16˝
washer between bolt head and rubber link.
Torque to 30-40 in. lbs. (3.75-5 Nm)
(FIGURE 16).
HEIGHT CONTROL
VALVE ARM
FIGURE 16
Link End Assembly
“A” LINKAGE
LENGTH
SHOULDER BOLT
5/16˝ WASHER
LOWER LINKAGE
CONNECTION
HOSE CLAMP
LINK END
2.
Determine length of rod required (“B” Dim.) by subtracting
13/8˝ (35mm) from “A” Dim. (FIGURE 15).
Example:
5/16˝ WASHER
13 3/4˝ (349mm) “A” Dim. minus
1 3/8˝ (35mm) = 123/8˝ (314mm)
“B” Dim. is the length of the Rod required.
3.
ROD
AXLE TAB OR HEIGHT
CONTROL VALVE ARM
1/4˝ - 20 LOCK NUT
If new rod link is required, cut rod to length required;
remove any sharp edges that may cause damage to the
rubber link ends during assembly.
FIGURE 15
Determine Length of Link Assembly
“A” DIMENSION
“B” DIMENSION
(“A” DIM. MINUS 13/8˝ (35mm)
1˝(25.4 mm) MIN.
19/16˝ (39.6mm) MAX.
XL-AR406 Rev C
12
Page 53
PRESSURE PROTECTION VALVE
Proper Installation
The new Air Pressure Protection Valve (PPV) (FIGURE 17A)
should be installed so that the air supplied from the Air Reservoir
enters the port marked "IN" on the PPV. If the Optional valve is
used (FIGURE 17B), the arrows on the bottom of the valve
should point away from the Air Reservoir towards the air
suspension, while making sure the Cap is in the upright
(TOP) position.
FIGURE 17A
Pressure Protection Valve
PRESSURE PROTECTION VALVE,
905 60 109
Install air lines to the air suspension and support lines where
necessary (FIGURE 9), using clip supports, grommets and bulk
head fittings.When installing pressure protection valve (PPV),
use a drop of oil or loctite to lubricate threaded connections. DO
NOT USE a pipe compound or teflon tape as they may clog
valve.After PPV has been installed, pressurize air system with a
constant supply of air in excess of 75 psig (5.2 bars), and check
all connections for air leaks (FIGURE 9).
FIGURE 17B
Optional Pressure Protection Valve
Periodic Maintenance
IMPORTANT: Air pressure protection valves maintain safe
brake pressure; only optional valve (905 54
107) cleans air by using a removable filter. Set
at factory, approximately 75 psig (5.2 bars)
opens the valve and 65 psig (4.5 bars) closes
valve. (Attach PPV onto air reservoir—
see FIGURE 9).
PRESSURE
PROTECTION VALVE,
905 54 107
CAP
TO AIR
SUSPENSION
Drain all moisture from the Air Reservoir at regular intervals.
Check the PPV for proper air flow. If optional PPV is used
replace the filter every 3 months or when the air flow
is reduced (FIGURE 17B).
The PPV must be checked for proper operation during each
brake system inspection. The purpose of the valve is to maintain
at least brake operating pressure in event of a serious air leak in
the suspension system.
To test the PPV, charge the air system to 90+ psig and disconnect
air line supply from downstream (suspension) side of PPV. Air
should stop flowing through the PPV before the spring brakes
begin to apply or before the tank pressure is reached.
NOTE: See Arrow at
bottom of
valve for air
flow direction
AIR
FLO
W
O-RING
AIR FILTER
AIR RESERVOIR
IMPORTANT: If air does not stop flowing, replace the
pressure protection valve.
XL-AR406 Rev C
13
Page 54
AXLE ALIGNMENT
IMPORTANT: Axle alignment can only be achieved if the
frame bracket pivot holes are the same
distance from the kingpin, left and right.Axle
alignment should always be done while the
trailer is empty.
1.
To properly align the suspension, the trailer should be
pulled in a straight line for a sufficient distance to insure
there are no binds in the suspension.
2.
Alignment can be achieved with an optical device designed
especially for this purpose or manually by the following
manner: Measure the distance from the king pin to the
center line of the spindles on the front axles.
It is recommended that spindle extensions be utilized.
Dimensions A and B must be equal within 1/8˝ (3mm).
Dimension E is equal to the distance between the trailer
center line and the axle center line (FIGURE 18).
FIGURE 19
EZ-Align
Alignment arrow indicates (neutral
position of) alignment adjustment
A
B
ROTATE PIVOT BOLT
A
FORE (A) AND AFT (B) MOVEMENT
FIGURE 20
EZ-Align Non-Welded Style Assembly
FIGURE 18
Slider Suspension Alignment
C
Alignment Collar –
pre-welded to frame
bracket (both sides)
by suspension
manufacturer. DO
NOT cut weld.
A
B
E
B
Alignment Block with D-shaped hole.
DO NOT weld alignment block to
alignment collar on frame bracket.
D
A = B ± 1/8˝ (3mm)
C = D ± 1/16˝ (1.6mm)
A
E = ≤ 1/16˝ (1.6mm)
EZ-Align (Non-welded) Connection
Axle Alignment
1.
Loosen the 11/8˝ pivot bolt connection nut (FIGURE 19).
DO NOT weld pivot bolt
assembly to alignment collar
on frame bracket.
IMPORTANT: The EZ-Align design maintains proper alignment
under correct torque without welding.
IMPORTANT: DO NOT remove weld from bolt head.
2.
Rotate bolt head clockwise to move axle forward
(A arrows); counterclockwise to move axle rearward
(B arrows) (FIGURE 19).
3.
Retorque the pivot bolt connection nut, no weld required (see
FIGURE 7 on page 8). See TABLE 2 Pivot Bolt Torque Chart on
page 8.
IMPORTANT: DO NOT weld EZ-Align pivot bolt (alignment
block) assembly to alignment collars on frame
brackets (FIGURE 20).
XL-AR406 Rev C
14
Page 55
COMPONENT REPLACEMENT INSTRUCTIONS
Suspension Air Springs
Suspension Air Springs
IMPORTANT: Air springs must be replaced with the proper
air spring for your application. Check the
flexible member and piston for the part
number. If the part number is not available,
refer to FIGURE 2 on page 3 to identify your
specific model or refer to the OEM vehicle
build specifications.
IMPORTANT: It is the responsibility of the air system
installer to secure all air lines and check for
any air leaks. If air leaks are detected, repair as
required. Failure to eliminate the air leaks may
compromise the suspension performance.
FIGURE 21
Suspension Air Spring
NOTE: Refer to RL Series Parts List, XL-AR405-01 for correct
part replacements.
NOTE: For further assistance with air spring part number
identification contact SAF-HOLLAND technical
assistance at 888-396-6501.
MOUNTING NUT
IMPORTANT: It is recommended that the vehicle be unloaded
before beginning service procedures.
1.
NOTE: The height control valve may be used as an improvised
jack by disconnecting the lower height control valve
(HCV) linkage and moving the HCV control arm to
“up” position to raise vehicle (FIGURE 13 on page
11).With vehicle raised above the height specified in
step 1, position jack stands under vehicle frame at
OEM specified locations and move control arm
to “down” position to lower vehicle onto jack stands.
Hold control arm down until air springs
are completely exhausted.
Failure to completely exhaust air springs
prior to removal may result in
unexpected air spring movement which, if not avoided,
may result in minor or moderate injury.
•
AIR SPRING
To Air Spring Piston
Mounting Stud
Shock Absorbers
IMPORTANT: Shock absorber must be replaced with the proper
shock absorber. Check shock for part number. If
part number is not available,refer to FIGURE 2 on
page 3 to identify your specific model (the last two
digits of the model number relate to ride height),
or refer to the OEM vehicle build specifications.
1.
It is recommended the vehicle be unloaded. Block vehicle to
prevent rolling.
Failure to chock tires prior to beginning
maintenance could allow vehicle
rollaway which, if not avoided, could result in death or
serious injury.
2.
Vehicle must be at model’s specified ride height or below to
assure that tension is relieved on shocks.
3.
Remove upper and lower mounting bolts and shock absorber
(FIGURE 22).
Automatic control – use height control valve by
disconnecting link at lower connection, then rotate
control arm to exhaust (approx. 45° down) position, or
4.
Replace with correct shock absorber and fasteners.
5.
Torque nuts to 150 ft. lbs. (203 Nm) lubricated.
Disconnect air supply line from air spring.
6.
If ride height was changed, you must return the ride height
to your model’s ride height requirement.
Exhaust air from suspension system by:
•
AIR SPRING
MOUNTING
PLATE
AIR SUPPLY
FITTING
Support vehicle frame with adequate jack stands. Set jack
stand height at approximately 2˝ (51mm) above the
suspension’s specified ride height (FIGURE 11 on page 10).
Failure to properly support suspension
during maintenance may allow
suspension to fall which, if not avoided, could result in
death or serious injury.
2.
continued
IMPORTANT: If air spring has a leak and is deflated, step 2
must still be performed.
3.
Disconnect and remove old air spring assembly
(FIGURE 21).
4.
Install new air spring assembly and torque fasteners (see
Torque Charts on page 8).
5.
Reconnect air supply line and link connections.
6.
Recharge air system in excess of 75 psig (5.2 bars), and
check system for leaks.
continued
FIGURE 22
Shock Absorber
BOLT
SHOCK
BOLT
UPPER
SHOCK
BRACKET
LOWER
SHOCK
BRACKET
XL-AR406 Rev C
WASHER
NUT
15
Page 56
COMPONENT REPLACEMENT INSTRUCTIONS
Pivot and Axle Connection Rubber Bushings
IMPORTANT: When replacing the rubber bushings at
these connections be sure the proper
SAF-HOLLAND SRK (Service Repair Kit) is
used as they contain all necessary parts to
service one axle (2 kits per tandem). Refer to
Service Repair Kit section of RL Series
Suspension Parts List (XL-AR405-01) for
proper SRK. It may be advantageous to service
both pivot and axle connections at the
same time.
NOTE: The SAF-HOLLAND Bushing Service Tool, Part No.
505 44 012 is available to ease removal and
replacement of bushings. Contact your
SAF-HOLLAND distributor or Parts List for details.
FIGURE 23
Bushing Service Tool
3.
continued
If servicing all equalizing beam bushings, equalizing beam
must be completely removed.
NOTE: If servicing the front pivot bushing only and using
the SAF-HOLLAND Bushing Service Tool, remove the
pivot bolts and rotate front of equalizing beams
downward to gain access to bushing.
4.
Disconnect air spring and shock absorber at lower
connections.
5.
Disconnect height control valve linkage at lower
connection (FIGURE 14, page 12).
6.
Disconnect front pivot and axle connection hardware then
remove equalizing beam (FIGURE 24).
FIGURE 24
Pivot and Axle Connections
EZ-ALIGN
PIVOT
CONNECTION
EQUALIZING
BEAM
AXLE
ADAPTER
BOLTS
PART NO. 505 44 012
IMPORTANT: It is recommended that the vehicle be
unloaded before beginning
service procedures.
PIVOT BOLT
NUTS
1.
Support vehicle frame with adequate jack stands. Set jack
stand height at approximately 2˝ (51mm) above the
suspension’s specified ride height (FIGURE 11 on page 10).
AXLE
ADAPTER
Failure to properly support suspension
during maintenance may allow
suspension to fall which, if not avoided, could result in
death or serious injury.
NOTE: The height control valve may be used as an
improvised jack by disconnecting the lower height
control valve (HCV) linkage and moving the HCV
control arm to “up” position to raise vehicle (FIGURE
13 on page 11).With vehicle raised above the height
specified in step 1, position jack stands under vehicle
frame at OEM specified locations and move control
arm to “down” position to lower vehicle onto jack
stands. Hold control arm down until air springs are
completely exhausted.
Failure to completely exhaust air springs
prior to removal may result in
unexpected air spring movement which, if not avoided,
may result in minor or moderate injury.
2.
Exhaust air from the suspension system by:
•
•
Automatic control — use height control valve by
disconnecting link at lower connection, then rotate
control arm to exhaust (approx. 45° down) position, or
PIVOT BOLT
WELDED PIVOT
CONNECTION
7.
Inspect axle adapters for wear, cracks and failed welds.Axle
adapters should have a 1/2˝ (13mm) (3 pass) fillet weld
(refer to proper SAF-HOLLAND NS-65-83 or NS-65-86
specifications for RL Series). Replace all worn or cracked
axle adapters.
8.
Inspect equalizing beams for wear, cracks and failed welds.
Replace cracked equalizing beams.
IMPORTANT: NEVER repair a cracked equalizing beam.
DO NOT weld cracks. Secondary weld
failures during use may cause loss of
vehicle control.
Failure to replace a cracked equalizing
beam may cause loss of vehicle control
which, if not avoided, could result in death or
serious injury.
continued
Disconnect air supply line from air spring.
XL-AR406 Rev C
16
Page 57
COMPONENT REPLACEMENT INSTRUCTIONS
Pivot and Axle Connection Rubber Bushings
9.
continued
Press out old bushing(s) using a Bushing Service Tool,
Part No. 505 44 012.
continued
FIGURE 27
Wear Washer Locations
Pivot Connection
WEAR WASHERS
IMPORTANT: DO NOT use an open flame or other heat
source to remove the bushings.
10. Clean out all foreign material from bushing receptacle(s).
Lubricate new bushing(s) with approved lubricant, or a soap
and water solution.
IMPORTANT: DO NOT use oil-based lubricant or brake
fluid, as it can cause damage to the rubber.
OUTSIDE OF
SUSPENSION
FRAME BRACKET
FIGURE 25
Equalizing Beam Bushings Location
PIVOT
CONNECTION
BUSHING
Axle Connection
EQUALIZING BEAM
WEAR WASHERS
AXLE
CONNECTION
BUSHINGS
WEAR
WASHERS
SUSPENSION
AXLE ADAPTER
BUSHING
RECEPTACLE
FIGURE 26
Centering Bushings in Equalizing Beam
Top View of Beam
EQUAL
DIMENSIONS
11. Press new bushing(s) in beam. Bushing(s) must be
centered in beam receptacles. It may be necessary to
push bushing past center approximately 1˝ (25.4mm)
and then re-center the bushing to relieve the rubber
(FIGURES 25 and 26).
12. Re-install equalizing beam with new wear washers, bolts and
nuts. Be sure to install wear washers in proper locations
(FIGURE 27). Position at ride height and properly torque
fasteners (see Torque Charts on page 8).
13. Reconnect air springs, shock absorbers and height control
valve linkage. Properly torque fasteners (see Torque Chart
on page 8).
EQUAL
DIMENSIONS
14. Remove jack stands. Build system air pressure in excess
of 75 psig (5.2 bars) and check for leaks in air system at
all connections.
IMPORTANT: It is the responsibility of the air system
installer to secure all air lines and check for
any air leaks. If air leaks are detected, repair as
required. Failure to eliminate the air leaks may
compromise the suspension performance.
continued
XL-AR406 Rev C
17
Page 58
COMPONENT REPLACEMENT INSTRUCTIONS
Equalizing Beam
IMPORTANT: It is recommended that the vehicle be unloaded
before beginning service procedures.
1.
Support vehicle frame with adequate jack stands. Set jack stand
height at approximately 2˝ (51mm) above the suspension’s
specified ride height (FIGURE 11 on page 10).
continued
FIGURE 28
Pivot and Axle Connections
EZ-ALIGN
PIVOT
CONNECTION
Failure to properly support suspension
during maintenance may allow
suspension to fall which, if not avoided, could result in
death or serious injury.
EQUALIZING
BEAM
NOTE: The height control valve may be used as an
improvised jack by disconnecting the lower height
control valve (HCV) linkage and moving the HCV
control arm to “up” position to raise vehicle
(FIGURE 13) - page 11).With vehicle raised above the
height specified in step 1, position jack stands under
vehicle frame at OEM specified locations
and move control arm to “down” position to lower
vehicle onto jack stands. Hold control arm down
until air springs are completely exhausted.
AXLE
ADAPTER
BOLTS
PIVOT BOLT
NUTS
AXLE
ADAPTER
PIVOT BOLT
Failure to completely exhaust air springs
prior to removal may result in
unexpected air spring movement which, if not avoided,
may result in minor or moderate injury.
2.
Exhaust air from the suspension system by:
•
Automatic control — use height control valve by
disconnecting link at lower connection, then rotate
control arm to exhaust (approx. 45° down) position, or
•
Disconnect air supply line from air spring.
3.
Disconnect air springs, shock absorbers and height control
valve linkage at the lower connections.
4.
Disconnect front pivot and axle connection hardware then
remove equalizing beam(s) (FIGURE 28).
5.
6.
Install new equalizing beam(s) with new wear washers,
bolts and nuts. Be sure to install wear washers in proper
location (FIGURE 27). Position at ride height and properly
torque fasteners (see Torque Charts on page 8).
Reconnect air springs, shock absorbers and height control
valve linkage. Properly torque fasteners (see Torque Charts
on page 8). Check air system connections, including air
springs for leaks.
IMPORTANT: It is the responsibility of the air system
installer to secure all air lines and check for
any air leaks. If air leaks are detected, repair as
required. Failure to eliminate the air leaks may
compromise the suspension performance.
7.
Remove jack stands. Build system air pressure in excess of
75 psig (5.2 bars).
WELDED PIVOT
CONNECTION
Frame Bracket
When replacing frame bracket(s), see RL Series Suspension Parts
List Manual, XL-AR405-01, for correct Service Repair Kit.
1.
Place jack stands at necessary height.
Failure to properly support suspension
during maintenance may allow
suspension to fall which, if not avoided, could result in
death or serious injury.
2.
Remove tires.
3.
On the side of the trailer frame, mark the mounting location
of the frame bracket to be replaced.
4.
Remove old frame bracket.
IMPORTANT: Carefully air arc the welds connecting the
frame bracket to the frame. Do not use frame
if frame material is damaged. Repair the frame
and then install the frame brackets.
Failure to repair damaged frame may
cause damage to suspension with possible
loss of vehicle control which, if not avoided, could result in
death or serious injury.
5.
Install a new frame bracket per location marks, and weld per
SAF-HOLLAND NS-65-07-CI specification.
6.
Realign trailer per instructions on page 14.
7.
Reinstall tires and other suspension components, then
remove jack stands.
XL-AR406 Rev C
18
Page 59
TROUBLESHOOTING
Problem
Possible Cause and Remedy
All air springs flat (no air).
Insufficient air pressure to suspension. Build air pressure in excess of 75 psig
(5.2 bars). Malfunctioning air pressure protection valve – test the valve using
instructions on page 13. Replace if necessary. Check air compressor. HCV control
valve not working – follow HCV inspection procedure (see page 11).
Air leakage from the suspension air system or the air brake system. Test for
air leakage due to loose fittings or damaged air lines, air springs, brake actuators or
control valve.Tighten loose fittings to stop leakage and/or replace worn or
damaged parts.
Air springs deflate rapidly when
vehicle is parked.
Air leakage from the suspension air system. Test for air leakage due to loose
fittings between air tank and air suspension or damaged air lines, air springs or
height control valve.Apply a soapy solution to connections and air springs if
necessary to check for bubbles (leaks).Tighten loose fittings to stop leakage and/or
replace worn or damaged parts with new ones.
Ride height too high or too low.
Height control valve out of adjustment. Re-adjust the height control valve.
Air springs ruptured.
Tire, tire rim or brake component rubbing air spring. Check inside to inside
tire dimension.There must be 1˝ (25.4mm) minimum clearance around air spring. If
not, it may be necessary to reinstall suspension. Use tire rim back spacers to provide
more clearance.
Spring brake chamber rubbing air spring. Relocate chamber or rotate clamp
ring for more clearance.
Air spring failed.
Continual or repeated over-extension of the air spring. Visually inspect for
broken or loose shock absorber or shock absorber mounting bracket. Reconnect
loose parts and replace any defective parts. Check the adjustment of the height
control valves (see page 10).
Air spring(s) worn out. Replace.
Air leak or damaged line. Locate and repair.Air spring punctured or leaking –
replace with proper air spring.Then check for proper clearance around air spring,
1˝ (25.4mm) minimum.Also check shock absorbers.
“Temporary Operation.” If air loss occurs in the air suspension system and after
attempts to repair have failed to correct the problem, it is recommended that the
Height Control Valve Linkage be disconnected and all air exhausted from the
system.There is an internal rubber bumper built into the air spring which makes it
possible to operate the vehicle cautiously while driving at a reduced speed to the
nearest place of repair.
Restricted air lines(s) between the height control valve and the air spring(s).
Disconnect the height control valve linkage and rotate the actuating lever to the 45°
down position. If the air spring(s) remain inflated, check for pinched or blocked
line(s).
Front pivot connection worn and loose.
Welded pivot alignment plate(s) not welded. Weld per installation instructions
(see NS-65-78 and also FIGURE 8 on page 8).
Worn pivot alignment plate(s). If alignment plates are worn, replace and realign
axles (see page 14).
EZ-Align pivot alignment block(s) worn. If alignment blocks are worn, replace
and realign axles (see page 14).
Front pivot bolt loose. Connection not properly tightened, refer to page 7, step 10
for tightening procedure. Replace all worn or damaged components.
Excessive lateral axle walk. 3/4˝ (19mm) is maximum.Axle connection bolts
loose – properly tighten, see step 6 on page 7.Axle adapter welds failed – replace
adapters or remove old welds and reweld. Refer to proper SAF-HOLLAND
specifications for applicable model. Front pivot and/or axle connection bushings
worn – replace with proper SRK (see RL Series Suspension Parts List Manual,
XL-AR405-01).
continued
XL-AR406 Rev C
19
Page 60
TROUBLESHOOTING
continued
Problem
Possible Cause and Remedy
Shock absorber failures.
Over-extending shock absorbers. Suspension set at improper ride height –
re-adjust height control valve. Suspension mounted at wrong ride height – check
specification sheet, or refer to page 10 for correct ride height and adjustment
procedure. Wrong length or improper replacement shock absorber(s) – replace
if necessary (see page 15).
Excessive tire wear.
Alignment plates are not welded, are worn, or the axle is out of alignment.
Inspect for damage and replace components as necessary or realign and weld to
specifications on welded style alignments. Realign and tighten to specifications on
EZ-Align (non-weld) style alignments (see page 8).
Loose or worn bushings at pivot or axle connection. Inspect for damage
and replace components as necessary (see pages 16 and 17), or if loose, tighten
connection(s) to proper specification (see page 8).Then, check axle alignment and
realign if necessary (see page 14). If worn, replace with proper Service Repair Kit
(see RL Series Suspension Parts List Manual, XL-AR405-01).
Worn bushing tube ends and/or face of wear washers at axle connections.
Contact SAF-HOLLAND Service Department.
Suspension not properly installed. Contact SAF-HOLLAND Service Department
and/or check Trailer manufacturer for proper suspension installation; correct
where necessary.
E n g i n e e r i n g Yo u r R o a d t o S u c c e s s
SAF-HOLLAND USA, Inc.
888.396.6501 Fax 800.356.3929
SAF-HOLLAND Canada Limited
519.537.3494 Fax 800.565.7753
Western Canada
604.574.7491 Fax 604.574.0244
Copyright © January 2008-SAF-HOLLAND, Inc. All information contained in this document was correct at time of copyright, and is subject to change without notice. All rights reserved.
20
www.safholland.us
Page 61
XL-AR406 Rev C
LUBRICATION
Wheel-End Lubrication
4. Do not use thinning agents such as kerosene,
gasoline, or other solvents that lower the
viscosity of lubricants.
This section provides information on lubricating Meritor trailer axle wheel-ends with either
grease or oil. Figure 13.2.
5. The recommended frequency of wheel-end oil
changes depends on such factors as
environment, speeds, and loads imposed on
axle. For example, applications such as
container chassis service put limited stress on
wheel-end lubricant, allowing maintenance
intervals to be extended. Other applications,
such as off-highway dump trailer service, put
severe stress on the wheel-end lubricant,
requiring that maintenance be performed
more frequently. The following information is
therefore intended as a general guideline:
a. General – Change oil whenever it is
contaminated or when wheel-end cavity is
disrupted by removing spoke wheel or hub.
Oil Lubricated
b. Standard-Duty Service – For standard-duty
on-highway service, change oil every
100,000 miles or 12 months, whichever
comes first.
1. The most common oils used in Meritor
trailer axle wheel-ends have a designation
of API-GL-5 (American Petroleum Institute –
Gear Lubricant No. 5). This oil is also approved under military specification MIL2105D. Refer to Table O in this section.
2. In addition to the GL-5 oils listed, oils with
API grades GL-1, GL-2, GL-3 and GL-4 can
also be used in trailer axle wheel-ends.
These oils cannot be used in drive axles, or
any application which employs hypoid,
amboid, spiral, bevel, or planetary gearing.
c. Heavy-Duty Service – For heavy-duty onhighway, off-highway or combined on/off
highway service, change oil every 30,000
miles or 6 months, whichever comes first.
6. Guidance for lubricating a wheel-end with
approved gear oil (Table O) is as follows:
3. Oil viscosity should be suitable for the climate in which the axle will be operated.
a. Low viscosity single grade gear oils, such
as SAE 75W (Society of Automotive
Engineers), should only be used in cold
climates. Oil seals must be in excellent
condition when using low viscosity oils to
insure against loss of these thin fluids.
b. Multigrade oils, such as 80W/90, should
be used where vehicles operate in both
warm and cold climates.
Page 62
a. Note that detailed guidance for installing
components such as seals, bearings,
hubcaps and hubs is located in the
“Assembly” section of this manual.
b. Coat bearing cones with oil.
c. Apply a light film of NLGI #1 or #2 grease
(not oil) to axle spindle bearing journals to
help protect them from fretting corrosion.
Figure 13.3.
7. Inspect wheel-end oil level at least every
1,000 miles (1,600 km). To check, make
sure vehicle is on level ground then clean
hubcap window and observe oil level. Add
lubricant if oil level is down more than 0.25
inch (6.3 mm) from fill line. Figure 13.5.
CAUTION
On each axle there are six grease zerks that need
to be greased every six months or every 10,000
miles. The grease zerks are located by the arrows shown below.
ç
ç
ç
ç
ç
d. Fill wheel-end with an approved gear oil to
hubcap fill line. Note that oil must be given
sufficient time to settle prior to final check
of oil level. This is especially important in
cold conditions. Figure 13.4.
Greasing the Axle
ç
It is important not to overfill the wheel-end
cavity with lubricant. Wheel-end oil level
should never exceed the middle of the hubcap. Also, make sure any excess oil is wiped
away since it can contaminate brake linings
and cause poor brake performance.
CAUTION
Make sure any excess grease or oil is wiped
away since it can contaminate brake linings
and cause poor brake performance. If necessary, clean the disc or the drum and replace
contaminated linings.
Rollers on Hopper Doors
Generously lubricate rollers and grease universal joints monthly. This will help to force moisture and
dirt from the bearings.
Page 63
WIRING
Junction Box
Maurer Grain Trailers use a Truck-Lite 88 sealed wiring harness. A 7-pole nose box is used in conjunction with the wire harness.
Trailer Lights
The table below provides wire color codes for all trailers:
Yellow - Left Turn
Red - Stop Light
Brown - Tail Lights
Blue - A.B.S
Green - Right Turn
White - Ground
Black - Clearance, Cluster and License Plate
CLEANING THE TRAILER
It is imperative trailers constructed of steel be kept clean of salt and other harmful elements. Failure to
wash your trailer regularly and properly care for the paint and body may void any paint warranty claims
if the trailer shows signs of neglect or abuse.
When cleaning the trailer use a mild soap and rinse. Wash underneath both slope areas, kingpin, suspension areas and outside walls.
Keeping your trailer clean will help rid your trailer of salt and other harmful elements. This will help keep
your trailer looking new and improve it’s resale value.
VISUAL INSPECTION
For safe operating conditions and longer component life make these visual inspections before the trailer
is released for work. Remember the Department of Transportation mandates you do this inspection.
1. Check the angle of the chassis.
To get conditions for least tire wear, a loaded trailer must travel parallel to the highway. A level
angle of the chassis permits correct wheel chamber without toe-in or toe-out.
2. Check the tires.
The tires of each dual wheel must be matched to a minimum of 0.125” (3.2 mm) of the same rolling
radius and a minimum of 0.75” (19 mm) of the same rolling circumference. The tires also must
have equal air pressures.
3. Check the brake drums and linings.
Both wheel ends of each axle must have the same type of lining and drum equipment. Both tandem axles also must have the same kind of lining and drum equipment.
NOTE: Always follow the brake lining specifications supplied by the vehicle manufacturer.
4. Check the thickness of the brake lining.
The thickness of the brake lining must be the same on each shoe of the brake and on each side of
the axle.
5. Check the brake system.
Apply the brake and check for air leaks at the brakes, air tanks, hoses and valves. When the
brakes are applied, the brake shoes must move quickly and the lining must press against the
drum. When the brakes are released, the brake shoes must retract fully.
6. Check for leaking lubricant at the wheel ends.
Leaking lubricant is caused by worn or damaged seal, or wrong gasket or seal installation.
Page 64
GRAIN TRAILER
LIMITED GENERAL WARRANTY
This warranty applies to all grain trailers manufactured by Lakes Enterprises, Inc. d/b/a Maurer
Manufacturing. All goods manufactured by Maurer Manufacturing shall be free from all defects in
materials or workmanship under normal use and service, with loads not to exceed Manufacturer’s
rated capacity and speed. Applied only to the original owner, as evidenced by a completed warranty
registration on file at Maurer Manufacturing, for a period ending 12 months from the date of delivery.
THE WARRANTY REGISTRATION MUST BE COMPLETED AND RETURNED TO MAURER
MANUFACTURING WITHIN 30 DAYS OF DELIVERY OF THE PRODUCT TO THE ORIGINAL OWNER
OR ALL WARRANTIES WILL BE NULL AND VOID.
All claims, for defective goods arising under this limited warranty, must be made in writing
immediately upon discovery, but in no event, later than 12 months from the date of delivery to the
original owner.
The limited warranty is the sole and exclusive warranty made or given by Maurer Manufacturing in
connection with the manufacture of sale of goods and is in lieu of all other warranties of any type or
kind whatsoever, whether expressed or implied, written or oral. The provision hereof may not be
modified, altered, or extended except in writing signed by an authorized representative of Maurer
Manufacturing.
♦
♦
♦
♦
♦
♦
This warranty applies only to parts or components manufactured by Maurer Manufacturing,
which is defective in material or workmanship.
This warranty does not cover normal maintenance, service or adjustments.
This warranty does not cover depreciation or damage as a result of accident, negligent
handling, inadequate maintenance, or improper operation.
This warranty does not cover damage due to unauthorized modifications or repairs by
purchaser prior to Maurer Manufacturing inspection and approval.
This warranty does not cover any purchased components such, as but not limited to;
couplers, tires, axle assemblies, suspensions or any nonstandard feature or items specified
by the purchaser.
This warranty does not expand, enlarge upon, or alter in any way, the warranties provided by
the manufacturers of purchased components.
In the event that a claim shall arise under this limited warranty, Maurer Manufacturing may at its
option repair the affected goods, replace the affected goods, or refund an equitable portion of the
purchase price of the affected goods. The purchaser understands and agrees that, in the event of
a defect in material or workmanship, the remedies are limited to repair or replacement, at Maurer
Manufacturing’s option, such part or parts which examination shall disclose to manufacturer’s
satisfaction to have been defective.
All affected goods shall be held for inspection by Maurer Manufacturing or its representatives and
no claim hereunder shall be payable in connection with repairs made by purchaser prior to Maurer
Manufacturing’s inspection or without Maurer Manufacturing’s prior consent.
No claim shall be payable under this limited warranty unless purchaser shall provide Maurer
Manufacturing with the following information in writing in a timely manner:
Page 65
♦
♦
♦
♦
VIN (Vehicle Identification Number) of affected goods.
Number of days, weeks or months affected goods in service.
Location of affected goods.
Description and pictures of alleged defect.
In no event shall company be liable to purchaser for indirect, incidental or consequential damages
or injuries including, but not limited to downtime, cost of labor or materials, loss of profits to
purchaser’s business or goodwill, resulting from breach of warranty hereunder and all damages
resulting from defective goods, whether arising in tort, contract, or warranty except as specifically
herein provided are waived by purchaser.
With respect to all other parts not manufactured by Maurer Manufacturing, the respective manufacturers
warranty will be assigned to the purchaser.
Axle Beam
Axle Hub & Bearing Assembly
Spring Suspension
Air Ride Suspension
Landing Legs
Anti-Lock Braking System
Lights
Valves
limited 5 years
limited 1 year
limited 5 years
limited 3 years
limited 2 years
limited 3 years or 300,000 miles
limited 1 year
limited 6 months
Tire Warranty can be found in the manifest holder on the kingpin.
There are no warranties for used products or products that have been repaired, altered, modified,
overlooked, subjected to misuse, negligence, accident or ordinary wear and tear.
Operator is required to check wheel nuts, U-Bolts, radius rod bolts, and all other fasteners. Axle
alignment, tire wear, tarp wear, and oil level in hubs must be inspected. If needed, operator should
make proper adjustments to insure ill life of equipment. These item’s need to be checked the first
100 miles and again at 500 miles and periodically thereafter. These inspections and adjustments
are very important and must be performed.
State and Federal Laws require a daily inspection of this vehicle by the operator.
Maurer Manufacturing, products are sold without any express warranty except as set forth by this
warranty.
This warranty is effective March 1, 2008 and supersedes all previous Maurer Manufacturing, warranty
policies.
Maurer Manufacturing
1300 38th Avenue West
Spencer, IA 51301
Page 66
NOTES
Page 67
THIS PAGE INTENTIONALLY LEFT BLANK
Cut along dotted line
GRAIN TRAILER LIMITED WARRANTY REGISTRATION
Your new Grain Trailer is covered by a limited warranty.
To initiate the warranty this form MUST be completed and returned to
Maurer Manufacturing within 30 days of delivery.
PLEASE PRINT OR TYPE
Owner’s Name
Vehicle Identification Number
PO Box / Street Address
Trailer Description
City, State, Zip
Dealership Name
Telephone Number
City, State, Zip
Date of Purchase
Telephone Number
Intended Use:
Farm/Ranch
Rental
Commercial
Personal
Government
Dealer Representative
The Owner’s Manual has been given to me and explained. I have read and fully understand
the safe operation and the proper servicing and maintenance of the above trailer and the
terms of the limited warranty shown inside the manual.
Purchaser’s Signature: ________________________________
Date: _________________
Pre-Delivery Service: This trailer was carefully prepared for delivery, inspected and adjusted
according to factory recommendations before delivery to the retail purchaser.
Delivery Service: The limited warranty was explained and a copy was presented to the retail
purchaser along with the Owner’s Manual.
Dealer Representative Signature: ________________________________________
Cut along dotted line
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
LAKES ENTERPRISES, INC.
D/B/A
MAURER MANUFACTURING
Please mail to the following:
LAKES ENTERPRISES, INC. DBA
MAURER MANUFACTURING
PO BOX 160
SPENCER, IA 51301-0160
1300 38th Ave. West
Spencer, IA 51301
PH: (712) 262-2992 • FAX: (712) 262-1022
www.maurermfg.com
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