Check/adjust toe of steerable additional axle

AR40.20-W-0600A

Check/adjust toe of steerable additional axle

31.07.2017

Model

950.203/204/205 with rear axle 749.109

with code AN9 (Hydraulically steered trailing axle)

Modification notes

28.07.2017

Work procedure completely revised.

7

Steering cylinder

7.1

Nut

7.2

Adjustment bolt

7.3

Clip

8

Tie rod

8.1

Clip

B97

Additional axle steering angle sensor

S139

Axle centering switch

 Danger

Risk of death caused by vehicle slipping or toppling off during lifting

Only lift vehicle at the lift support points specified by the vehicle manufacturer.

AS00.00-Z-0032-01A

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

 Warning

Risk of injury from being trapped in the swivel range of steered axles

Ensure that no persons or objects are in the swivel range of all steered axles when turning the steering wheel. Do not stand in the swivel range of the additional steering axle when the engine is running.

AS46.00-Z-0002-01A

Topical note

Special instructions for lifting and supporting vehicle

AH00.60-N-0100-01B

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A



Check

1

Set steering gear to center position

Vehicles with steering gear 765.82, 765.889

AR46.20-W-0500-01A

2

Position wheels of front axle on the center of the turntable

AR00.60-W-2000-01H

3

Position wheels of steered additional axle at center of turntable

AR00.60-W-2000-01H

4

Position alignment bridges under wheels that are not on turntables

5

Block brake pedal

 Brake pedal jack

*000589183100

6

Start engine

7

Center the steered additional axle using the axle centering switch (S139)

 The indicator lamp in the axle centering switch (S139) must light up.
Do not touch the steering. The steering cylinder centers itself.

8

Turn off engine

9

Mount components required for wheel alignment check system onto vehicle

 See operating instructions for wheel alignment check system.

10

Check or, if necessary, adjust the toe using the wheel alignment measurement system

Total toe with steering cylinder at center position

*BE40.20-N-1001-17B

If the specified values for the toe are not reached.



Release nut (7.1) and clamp (7.3). Turn adjusting bolt (7.2) on steering cylinder (7) until the toe value on the side in question is reached. Tighten nut (7.1) and clamp (7.3). After this, release the clamps (8.1) on the tie rod (8), turn the tie rod (8) and adjust the opposite side.

11.1

Teach-in the steering angle sensor for the additional axle (B97)

If the straight-ahead position or the toe were adjusted.

AR46.80-W-1110A

 If the center position of the additional-axle steering angle sensor (B97) is not OK, then the additional-axle steering angle sensor (B97) cannot undergo the teach in process. An incorrect center position for the additional-axle steering angle sensor (B97) is indicated by 2 flashes of the electrohydraulic auxiliary steering indicator lamp.

If the additional-axle steering angle sensor (B97) teach-in process is not possible.



Mechanically adjust the additional-axle steering angle sensor (B97) and repeat the teach-in process.

AR46.80-W-0009-01A

Center position of steering angle sensor

*BE46.80-N-1005-01A

 Electrical connection kit

*201589009900

11.2

Remove components of wheel alignment check system, brake pedal jack, alignment bridges as well as all turntables from the vehicle

If the straight-ahead position or the toe were not adjusted.

Test and adjustment values for toe of auxiliary steering axle

Number

Designation

Model 950
with code AN9 (Hydraulically steered trailing axle)

BE40.20-N-1001-17B

Total toe with steering cylinder at center position

°

0

Test values for rear axle auxiliary steering (HZL/EHZ)

Number

Designation

Model 950.0/1/2/3 with code AN9

BE46.80-N-1005-01A

Center position of steering angle sensor

Volt

2,5 (0,05)