Check and adjust hydraulic steering limiter

AR46.20-W-1100D

Check and adjust hydraulic steering limiter

08.11.2019

Model

930.3, 932.3, 933.3, 942.3, 943.3, 950.3, 952.3, 953.3 with steering gear 765.887

Mercedes-Benz/ThyssenKrupp steering

Model

930.3, 932.3, 933.3, 942.3, 943.3, 950.3, 952.3, 953.3

HEMA dual-circuit power steering

1

Steering limiter valve (left steering angle)

2

Steering limiter valve (right steering angle)

3

Fuse

4

Spring washer

5

Screw

6

Screw plug

7

Sealing ring

8

Pressure gage

9

Hose

10

Test connection

 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 to skin or eyes from hydraulic fluid spraying out under pressure.Risk of poisoning from swallowing hydraulic fluid.

Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses.

AS00.00-Z-0013-01A

 Warning

Danger of injury to eyes caused by steering oil emerging at high pressure. Danger of poisoning caused by swallowing steering oil

The setting screws for the hydraulic steering limiters must be turned in by at least three rotations. Wear protective gloves, protective clothing and safety glasses.

AS46.00-Z-0001-01A

 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

 Warning

Risk of injury to skin or eyes from hot hydraulic fluid spraying out under high pressure. Risk of burn injuries from contact with components heated by hot hydraulic fluid. Risk of poisoning from swallowing hydraulic fluid

Do not make any technical modifications to the pressure gauge or the test equipment. Check the pressure gauge and test equipment for mechanical damage each time prior to use. Observe the flow diagram when connecting the test equipment. Wear protective gloves, protective clothing and safety glasses.

AS46.00-Z-0003-01A

 Warning

Risk of accident and injury caused by diagnostic equipment in vehicle while traveling

Never use the test equipment to verify the delivery rate and oil pressure of the power steering pump or the pressure gauge while driving.

AS58.40-Z-0001-01B

 Warning

Risk of injury caused by body parts being pinched or crushed as cab is tilted

Ensure that no one is within the tilting range of the cab as it is being tilted. Always tilt the cab all the way to the end position and secure it with the safety strut.

AS60.80-Z-0001-01A

Topical note

Special instructions for lifting and supporting vehicle

AH00.60-N-0100-01B

Topical note

Notes on maintenance and repair work

AH46.20-N-0001-01H

Topical note

Notes on tilting the cab

AH60.80-N-0003-01A

Note on calculation of tightening torque when using insertion or socket tools with various effective lengths

AH00.00-P-0015-01CW



Check

1

Load vehicle so as to be as close to primary operating conditions as possible.

 In isolated cases, and as a result of the steering kinematics, a front axle load that is too low may result in the steering limitation adjustment pressure not being reached or in adjustment not being possible.

2

Move front wheels to straight-ahead position.

3

Secure vehicle to prevent it moving away.

4

Position front wheels centrally on turn plates.

AR00.60-W-2000-01H

5

Open maintenance flap.

6

Tilt cab.

7

Unscrew screw plug (6) with sealing ring (7).

 Collect escaping oil in suitable container.

8

Install test connection (10).

 The test connection (10) can be ordered using part number A 942 351 00 69.

 STEERING GEAR 765.887Test connection to steering gear

*BA46.20-N-1015-01FA

 HEMA dual-circuit power steeringTest connection to steering gear

*BA46.20-N-1011-01JD

9

Connect hose (9) to manometer (8).

 Pressure gage

*000589062100

 Hose

*400589019100

10

Unscrew cap from test connection (10).

11

Attach hose (9) at test connection (10).

12

Check steering gear oil level and correct if necessary.

 STEERING GEAR 765.887Steering gear oil (ATF)

*BF46.00-N-1001-01E

 HEMA dual-circuit power steeringSteering gear oil (ATF)

*BF46.00-N-1001-01H

13

Tilt back cab.

 Ensure that hose (9) and manometer (8) are not trapped.

14

Start the engine and allow to run at an engine speed between 1400 and 1500 rpm.

15

Turn steering left or right several times using normal force of the hand until a steering gear oil temperature of approx. 50 °C is reached in the steering.


Only pull against mechanical end stop at steering wheel circumference for a short period of time (max. 5 s).
Otherwise damage could occur to the steering system.

16

Turn steering wheel left up to mechanical end stop using normal force of the hand, read off pressure at manometer (8), and release steering wheel again.


Only pull against mechanical end stop at steering wheel circumference for a short period of time (max. 5 s).
Otherwise damage could occur to the steering system.

17

Note down measured pressure.

18

Turn steering wheel to right up to mechanical end stop using normal force of the hand, read off pressure at manomenter (8), and release steering wheel again.


Only pull against mechanical end stop at steering wheel circumference for a short period of time (max. 5 s).
Otherwise damage could occur to the steering system.

19

Note down measured pressure.

20

Move front wheels to straight-ahead position.

21

Switch off engine.

22

Compare noted pressures with specified adjustment pressure.

STEERING GEAR 765.887Adjustment pressure for steering limiter

*BE46.20-N-1001-01FA

HEMA dual-circuit power steeringAdjustment pressure for steering limiter

*BE46.20-N-1001-01JD

If adjustment pressure is outside of tolerance:



Adjust hydraulic steering limiter.

AR46.20-W-1100-01A

STEERING GEAR 765.887Adjustment pressure for steering limiter

*BE46.20-N-1001-01FA

HEMA dual-circuit power steeringAdjustment pressure for steering limiter

*BE46.20-N-1001-01JD

 STEERING GEAR 765.887Steering limiter valve in steering gear center position for testing

*BA46.20-N-1003-01FA

 HEMA dual-circuit power steeringSteering limiter valve in steering gear center position for testing

*BA46.20-N-1003-01JD

 STEERING GEAR 765.887Retainer for steering limiter valves to steering gear

*BA46.20-N-1005-01FA

 HEMA dual-circuit power steeringRetainer for steering limiter valves to steering gear

*BA46.20-N-1005-01JD

 Pressure gage

*000589062100

 Hose

*400589019100

23

Tilt cab.

24

Detach hose (9) from test connection (10).

 Collect escaping oil in suitable container.

25

Screw cap onto test connection (10).

26

Detach hose (9) from manometer (8) and seal all connections.

27

Remove test connection (10).

 Collect escaping oil in suitable container.

28

Install screw plug (6) with new sealing ring (7).

 STEERING GEAR 765.887Test connection screw plug to steering gear

*BA46.20-N-1004-01FA

 HEMA dual-circuit power steeringTest connection screw plug to steering gear

*BA46.20-N-1004-01JD

29

Check steering gear oil level and correct if necessary.

 STEERING GEAR 765.887Steering gear oil (ATF)

*BF46.00-N-1001-01E

 HEMA dual-circuit power steeringSteering gear oil (ATF)

*BF46.00-N-1001-01H

30

Tilt back cab.

31

Close maintenance flap.

32

Raise vehicle at front axles, remove all turn plates, and lower vehicle back onto floor.

33

Conduct a road test.

 During the test drive, check the overall steering ability of the vehicle.

34

Check steering gear for leak tightness.

 Visual inspection.

Test values for steering gear

Number

Designation

STEERING GEAR 765.887

BE46.20-N-1001-01FA

Adjustment pressure for steering limiter

Specified value

bar

50 (10)

at engine speed

1/min

1400...1500

Test values for steering gear

Number

Designation

HEMA dual-circuit power steering

BE46.20-N-1001-01JD

Adjustment pressure for steering limiter

Specified value

bar

50 (10)

at engine speed

1/min

1400...1500

 Steering gear

Number

Designation

Steering gear 765.887

BA46.20-N-1003-01FA

Steering limiter valve in steering gear center position for testing

Nm

 5

 Steering gear

Number

Designation

HEMA dual-circuit power steering

BA46.20-N-1003-01JD

Steering limiter valve in steering gear center position for testing

Nm

 5

 Steering gear

Number

Designation

Steering gear 765.887

BA46.20-N-1004-01FA

Test connection screw plug to steering gear

Nm

18

 Steering gear

Number

Designation

HEMA dual-circuit power steering

BA46.20-N-1004-01JD

Test connection screw plug to steering gear

Nm

18

 Steering gear

Number

Designation

Steering gear 765.887

BA46.20-N-1005-01FA

Retainer for steering limiter valves to steering gear

Nm

13

 Steering gear

Number

Designation

HEMA dual-circuit power steering

BA46.20-N-1005-01JD

Retainer for steering limiter valves to steering gear

Nm

13

 Steering gear

Number

Designation

HEMA dual-circuit power steering

BA46.20-N-1011-01JD

Test connection to steering gear

Nm

14

 Steering gear

Number

Designation

Steering gear 765.887

BA46.20-N-1015-01FA

Test connection to steering gear

Nm

14

 Steering

Number

Designation

Steering gear 765.887

BF46.00-N-1001-01E

Steering gear oil (ATF)

Filling capacity

Liter

 8

Sheet

BB00.40-P-0236-02A

Sheet

BB00.40-P-0236-03A

Sheet

BB00.40-P-0236-06A

Sheet

BB00.40-P-0236-07A

 Steering

Number

Designation

HEMA dual-circuit power steering

BF46.00-N-1001-01H

Steering gear oil (ATF)

Filling capacity

Liter

 8

Sheet

BB00.40-P-0236-02A

Sheet

BB00.40-P-0236-03A

Sheet

BB00.40-P-0236-06A

Sheet

BB00.40-P-0236-07A