LI46.25-P-059240

Vehicle pulls to the right
Topic number
LI46.25-P-059240
Version
2
Design group
46.25 Hydraulic/electrohydraulic steering
Date
07-10-2014
Validity
463.### -1X as of XZ2 (YoM12)
Reason for change
Remedy, parts and attachment adapted
Reason for block
Complaint:
Vehicle runs off to the right on flat roads when driving straight ahead.
Cause:
Various causes are possible. Please perform a cause analysis as described in the remedy.
Remedy:
Proceed step by step if the problem continues to occur:
1.
Restore vehicle to series production configuration
e.g. remove any wheel spacers, check tire pressures, check tire sizes and running direction etc.
2.
Check wheel alignment and adjust if necessary
For this, always use universal adapters for the measuring heads; the Mercedes-Benz measuring head holders
are not suitable for the G-Class.
Rim runout compensation must be performed in all cases.
3.
Check steering gear
Detach drag link from steering gear.
Then measure the force required to move the pitman arm to the left and right (with the engine running!).
A commercially available spring balance, spring force meter, luggage scale or similar must be used for this, the
scale should extend from 0 to 400 N (0 to 40 kg).
The force must be measured at right angles to the pitman arm and at the same height.
Difference between left and right:
The greater force must be no more than 50% higher than the lower force.
Example:
Force for moving the pitman arm to the left: 300 N (30 kg)
Force for moving the pitman arm to the right: 200 N (20 kg)
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The steering gear must be replaced.
Replace steering gear if this is necessary according to the test (step 3):
1.
Replace steering gear including pitman arm (included in package).
The identification plate of the steering gear must bear a production date of at least 02/2014 and a production
number of at least 1545.
Always note: The marking on the steering shaft of the steering gear is not valid. The steering gear and steering
wheel must be in the straightahead position when installing.
- Install steering gear on frame and connect hydraulic connections
- Connect drag link to pitman arm
- Straighten right front wheel
- Straighten steering wheel
- Connect steering shaft to steering gear (the steering wheel and right front wheel must be straight!)
2.
Bleed steering gear (after filling with power steering fluid):
Start engine and switch off again.
Raise vehicle at the front (load off front wheels) and turn steering wheel to full left and right lock at least 5 times
with engine off.
Then lower vehicle (load on front wheels) and turn steering wheel to full left and right lock at least 10 times with
engine running until the system is free of air.
Check oil level and correct if necessary.
3.
Check toe at front axle and adjust if necessary.
4.
Adjust mechanical steering stops.
5.
Adjust hydraulic steering limiter.
The distance between the stop screw and the axle stop as the hydraulic limiter starts to operate must match the
values below (in contrast to the documentation in WIS):
Left: max. 2-8 mm
Right: max. 2-5 mm
6.
Test of power assistance when reversing at full steering angle (to both sides).
If the power assistance for centering the steering commences too late, the hydraulic steering angle must be adjusted.
Attachments
File
Description
Kraftmessung.jpg
Example of a commercially available scale for measuring
steering force at steering gear.
Typschild.JPG
Steering gear OK as of:
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© Copyright Daimler AG
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- Production date 02/2014
- Serial number 01545
Symptoms
Chassis/suspension / Suspension characteristic / Pulls to the right
Chassis/suspension / Suspension characteristic / Unsatisfying straight ahead running
Parts
Part number
ES1 ES2 Designation
A 463 460 07 01
Quantity Note
Steering gear
1
EPC Other
make
part
Production date as per identification plate as of 02/2014 and
at least 1545.
X
Work units
Op. no.
Operation text
Time
Damage
code
Note
40214 B5
Vehicle OK only due to wheel alignment check (step 2)
46401 17
Vehicle OK only after steering gear
replacement (step 3)
WIS-References
Document number
Title
Note
Allocation
AR40.20-P-0200AC
Perform wheel alignment
check
Remedy
AR46.20-P-0500GY
Remove/install steering gear
Remedy
AR40.20-P-0345AC
Measure/adjust wheel angle Adjustment of mechanical
steering stop
Remedy
AR46.25-P-3090F
Check/adjust hydraulic limi- Important! Adjustment vater
lues:
Left: max. 2-8 mm
Right: max. 2-5 mm
Remedy
Validity
Vehicle
Engine
Transmission
463.202
*
*
463.236
*
*
463.237
*
*
463.242
*
*
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© Copyright Daimler AG
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463.272
*
*
463.273
*
*
463.274
*
*
463.346
*
*
07-14-2014 3:30 PM
© Copyright Daimler AG
GKRZYZA
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