Check and adjust hydraulic steering limiter

AR46.20-W-1100NE

Check and adjust hydraulic steering limiter

04.06.2020

Model

956

1

Steering gear

3

Test connection

5

Hose

2

T-piece

4

Cap

6

Pressure gage

 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

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



Check

1

Move vehicle to driving level using level control system operating unit.

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

Connect hose (5) to manometer (6).

 Pressure gage

*000589062100

 Hose

*400589019100

7

Unscrew cap (4) from test connection (3).

8

Connect hose (5) at test connection (3).

9

Start engine and run at idle speed.

10

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


Do not pull against the mechanical end stop for more than a short time (max. 5 s).
Otherwise damage could occur to the steering system.

11

Turn steering wheel left up to mechanical end stop using normal force of the hand, read off pressure at manometer (6), 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.

12

Note down measured pressure.

13

Turn steering wheel to right up to mechanical end stop using normal force of the hand, read off pressure at manometer (6), 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.

14

Note down measured pressure.

15

Move front wheels to straight-ahead position.

16

Switch off engine.

17

Compare noted pressures with specified adjustment pressure of steering limitation.

Adjustment pressure for steering limiter

*BE46.20-N-1002-01K

If noted pressures do not match specified adjustment pressure of steering limitation:



Set hydraulic steering limiters.

AR46.20-W-1100-01NE

Adjustment pressure for steering limiter

*BE46.20-N-1002-01K

Screw-in depth of setting screw for hydraulic steering limiter (distance between bolt head of setting screw and contact surface of bolt head of screw plug)

*BE46.20-N-1001-01K

 Screw plug for setting screw of hydraulic steering limiter to steering gear

*BA46.20-N-1013-01N

 Pressure gage

*000589062100

 Hose

*400589019100

18

Detach hose (5) from test connection (3).

 Collect escaping oil in suitable container.

19

Screw cap (4) onto test connection (3).

20

Remove hose (5) from manometer (6) and seal all connections.

21

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

22

Check steering gear oil level and correct if necessary.

 Steering gear oil

*BF46.00-N-1001-01NE

23

Close maintenance flap.

24

Conduct a road test.

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

Test values for steering gear

Number

Designation

Model 956 without code C6L

Model 956 with code C6L

BE46.20-N-1001-01K

Screw-in depth of setting screw for hydraulic steering limiter (distance between bolt head of setting screw and contact surface of bolt head of screw plug)

bar

 4

 4

For picture, see

GF46.25-W-0800HA

GF46.25-W-0800HA

Test values for steering gear

Number

Designation

Model 956 without code C6L

Model 956 with code C6L

BE46.20-N-1002-01K

Adjustment pressure for steering limiter

Vehicle unladen

Steering to left

Specified value

bar

40 (+10)

70 (+10)

at engine speed

1/min

 800

 800

Steering to right

Specified value

bar

40 (+10)

70 (+10)

at engine speed

1/min

 800

 800

Load vehicle

Steering to left

Specified value

bar

40 (+10)

70 (+10)

at engine speed

1/min

 800

 800

Steering to right

Specified value

bar

40 (+10)

70 (+10)

at engine speed

1/min

 800

 800

 Steering gear

Number

Designation

Model 956

BA46.20-N-1013-01N

Screw plug for setting screw of hydraulic steering limiter to steering gear

Nm

25 (+5)

 Steering

Number

Designation

Model 956

BF46.00-N-1001-01NE

Steering gear oil

Filling capacity

Liter

 4

Sheet

BB00.40-P-0236-03A

Sheet

BB00.40-P-0236-06A

Sheet

BB00.40-P-0236-07A