Check delivery rate and oil pressure of power steering pump

AR46.30-W-3100ZE

Check delivery rate and oil pressure of power steering pump

13.12.2019

Model

949

Modification notes

13.12.2019

Work procedure completely revised.

1

Tester

1.1

Switches

1.2

Display

1.3

Control wheel

 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

 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

Notes on maintenance and repair work

AH46.20-N-0001-01H

Topical note

Notes on handling test equipment for testing delivery rate and oil pressure of power steering pump

AH46.30-N-0001-01A



Check

1

Mount test equipment (1).

AR46.20-W-3055ZE

 Leave vehicle jacked up after bleeding. Do not close engine hood.

2

Switch on test equipment (1) using switch (1.1) and wait until self-test has been completed.

If the test equipment (1) is not already switched on.

 During the self-test, all segments in the display (1.2) are actuated briefly. After the self-test, all three green LEDs in the display (1.2) must be lit. If this is not the case, there is a fault in the test equipment (1). Refer to test equipment operator's manual (1).

3

Turn control wheel (1.3) to left up to end stop.

 This ensures that the valve in the test equipment (1) is fully open.

4

Start engine and run at idle speed.

5

Turn steering left or right and hold at mechanical end stop using normal force of the hand until oil temperature in steering reaches approx. 50 °C.

 The oil temperature is the lower value in the display (1.2).
Increase the engine speed slightly if necessary.

6

Move front wheels to straight-ahead position and release steering wheel.

7

Set back pressure of approx. 50 bar.

 To do so, turn control wheel (1.3) to right until a pressure of approx. 50 bar is shown in the center of the display (1.2).

8

Check delivery rate.

 To do so, read off the upper value in the display (1.2) and compare with the specified value.
Observe the specified engine speed.

Steering gear 765.82Power steering pump delivery rate

*BE46.30-N-1002-01B

Steering RB8098, ZF8098Power steering pump delivery rate

*BE46.30-N-1002-01ZE

If the delivery rate is not reached.



Switch off engine and replace power-steering pump.

Model 949 with engine 457.9

AR46.30-W-0500ZEB

Model 949 with engine 926.9

AR46.30-W-0500ZEA

9

Check oil pressure.


To do so, turn control wheel (1.3) to right up to end stop, read off pressure in center of display (1.2) and turn control wheel (1.3) to left up to end stop again after 5 s at the latest.
The power steering pump can otherwise overheat.

 The pressure depends on the governed pressure of the pressure limiting valve in the test equipment (1).
Repeat test 3 times.

Steering gear 765.82Governed pressure of test equipment pressure limiting valve

*BE46.30-N-1001-01B

Steering RB8098, ZF8098Governed pressure of test equipment pressure limiting valve

*BE46.30-N-1001-01ZE

If governed pressure of pressure limiting valve is not reached 3 times in succession in test equipment (1):



Switch off engine and replace power-steering pump.

Model 949 with engine 457.9

AR46.30-W-0500ZEB

Model 949 with engine 926.9

AR46.30-W-0500ZEA

10

Switch off engine.

11

Wait until oil temperature drops below 40 °C.

 The oil temperature is the lower value in the display (1.2).

12

Switch off test equipment (1).

13

Remove test equipment (1).

AR46.20-W-3055ZE

Check values for power steering pump

Number

Designation

Steering gear 765.82 without code AN9

BE46.30-N-1001-01B

Governed pressure of test equipment pressure limiting valve

bar

160

Check values for power steering pump

Number

Designation

SteeringRB8098

SteeringZF8098

BE46.30-N-1001-01ZE

Governed pressure of test equipment pressure limiting valve

bar

160

160

Check values for power steering pump

Number

Designation

Steering gear 765.82 without code AN9

BE46.30-N-1002-01B

Power steering pump delivery rate

Specified value

l/min

 18

at engine speed

1/min

 1000

Check values for power steering pump

Number

Designation

SteeringRB8098

SteeringZF8098

BE46.30-N-1002-01ZE

Power steering pump delivery rate

Specified value

l/min

 18

 18

at engine speed

1/min

 1000

 1000