Check delivery rate and oil pressure of power steering pump · ar4630w3100h · Mercedes-Benz WIS

AR46.30-W-3100H

Check delivery rate and oil pressure of power steering pump

12.12.2019

Model

963, 964

Modification notes

12.12.2019

Work procedure completely revised.

Check delivery rate and oil pressure of power steering pump

1	Tester
1.1	Switches
1.2	Display
1.3	Control wheel

W46.25-1079-12

Only on vehicles with code C6P (Power steering pump, electronically controlled)

2	Electrical connector
Y82	Power steering pump solenoid valve

W46.30-1066-12

 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 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
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-3055H
		 Leave vehicle jacked up after bleeding. When tilting back the cab, make sure that the test lines are not pinched.
2	Disconnect electrical connector (2) from power-steering pump solenoid valve (Y82).	Only on vehicles with code C6P (Power steering pump, electronically controlled)
3	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).
4	Turn control wheel (1.3) to left up to end stop.	 This ensures that the valve in the test equipment (1) is fully open.
5	Start engine and run at idle speed.
6	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.
7	Move front wheels to straight-ahead position and release steering wheel.
8	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).
9	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.
		Power steering pump delivery rate	*BE46.30-N-1002-01I
		If the delivery rate is not reached.
		
		Switch off engine and replace power-steering pump.
		Vehicles with engine 460.9	AR46.30-W-0500O
		Vehicles with engine 470.9, 471.9, 473.9	AR46.30-W-0500H
		Vehicles with engine 936.9, without code A4B (Leading axle, 7.5 t, steered, relievable), code A4Q (Trailing axle, 9 t, steered, relievable, liftable), code A4R (Trailing axle, 9 t, steered, relievable), code A4T (Trailing axle, 8 t, steered, relievable, liftable), code A4U (Trailing axle, 8 t, steered, relievable), code A4X (Trailing axle, 7.5 t, steered, relievable) or code A4Y (Trailing axle, 7.5 t, steered, relievable, liftable), Left-hand drive vehicles up to 28.02.15 and right-hand drive vehicles up to 31.05.2016 with engine 936.9, with code A4B (Leading axle, 7.5 t, steered, relievable), code A4Q (Trailing axle, 9 t, steered, relievable, liftable), code A4R (Trailing axle, 9 t, steered, relievable), code A4T (Trailing axle, 8 t, steered, relievable, liftable), code A4U (Trailing axle, 8 t, steered, relievable), code A4X (Trailing axle, 7.5 t, steered, relievable) or code A4Y (Trailing axle, 7.5 t, steered, relievable, liftable)	AR46.30-W-0500HE
		Left-hand drive vehicles as of 01.03.15 and right-hand drive vehicles as of 01.06.2016 with engine 936.9, with code A4B (Leading axle, 7.5 t, steered, relievable), code A4Q (Trailing axle, 9 t, steered, relievable, liftable), code A4R (Trailing axle, 9 t, steered, relievable), code A4T (Trailing axle, 8 t, steered, relievable, liftable), code A4U (Trailing axle, 8 t, steered, relievable), code A4X (Trailing axle, 7.5 t, steered, relievable) or code A4Y (Trailing axle, 7.5 t, steered, relievable, liftable)	AR46.30-W-0500HEB
10	Check regulation of delivery rate.	Only on vehicles with code C6I (Power steering pump, controlled) or code C6P (Power steering pump, electronically controlled)
		 To do so, slowly increase engine speed to 1500 rpm and observe value in upper display (1.2).
		If delivery rate also increases with increasing engine speed:
		
		Switch off engine and replace power-steering pump.
		Model 963 with engine 470.9, 471.9, 473.9 and code C6I (Power steering pump, controlled) or code C6P (Power steering pump, electronically controlled)	AR46.30-W-0500H
11	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 is dependent on the control pressure of the pressure limiting valve in the power steering pump (for vehicles with code C6I (Power steering pump, controlled) or code C6P (Power steering pump, electronically controlled)) or on control pressure of pressure limiting valve in test equipment (1) (for vehicles with code C6J (Power steering pump, uncontrolled)). Repeat test 3 times.
		Vehicles with code C6P (Power steering pump, electronically controlled)Governed pressure of power steering pump pressure limiting valve	*BE46.30-N-1001-01I
		Vehicles with code C6I (Power steering pump, controlled)Governed pressure of power steering pump pressure limiting valve	*BE46.30-N-1001-01I
		Vehicles with code C6J (Power steering pump, uncontrolled)Governed pressure of test equipment pressure limiting valve	*BE46.30-N-1004-01I
		If governed pressure of pressure limiting valve is not reached 3 times in succession:
		
		Switch off engine and replace power-steering pump.
		Vehicles with engine 460.9	AR46.30-W-0500O
		Vehicles with engine 470.9, 471.9, 473.9	AR46.30-W-0500H
		Vehicles with engine 936.9, without code A4B (Leading axle, 7.5 t, steered, relievable), code A4Q (Trailing axle, 9 t, steered, relievable, liftable), code A4R (Trailing axle, 9 t, steered, relievable), code A4T (Trailing axle, 8 t, steered, relievable, liftable), code A4U (Trailing axle, 8 t, steered, relievable), code A4X (Trailing axle, 7.5 t, steered, relievable) or code A4Y (Trailing axle, 7.5 t, steered, relievable, liftable), Left-hand drive vehicles up to 28.02.15 and right-hand drive vehicles up to 31.05.2016 with engine 936.9, with code A4B (Leading axle, 7.5 t, steered, relievable), code A4Q (Trailing axle, 9 t, steered, relievable, liftable), code A4R (Trailing axle, 9 t, steered, relievable), code A4T (Trailing axle, 8 t, steered, relievable, liftable), code A4U (Trailing axle, 8 t, steered, relievable), code A4X (Trailing axle, 7.5 t, steered, relievable) or code A4Y (Trailing axle, 7.5 t, steered, relievable, liftable)	AR46.30-W-0500HE
		Left-hand drive vehicles as of 01.03.15 and right-hand drive vehicles as of 01.06.2016 with engine 936.9, with code A4B (Leading axle, 7.5 t, steered, relievable), code A4Q (Trailing axle, 9 t, steered, relievable, liftable), code A4R (Trailing axle, 9 t, steered, relievable), code A4T (Trailing axle, 8 t, steered, relievable, liftable), code A4U (Trailing axle, 8 t, steered, relievable), code A4X (Trailing axle, 7.5 t, steered, relievable) or code A4Y (Trailing axle, 7.5 t, steered, relievable, liftable)	AR46.30-W-0500HEB
12	Switch off engine.
13	Wait until oil temperature drops below 40 °C.	 The oil temperature is the lower value in the display (1.2).
14	Switch off test equipment (1).
15	Connect electrical connector (2) at power-steering pump solenoid valve (Y82).	Only on vehicles with code C6P (Power steering pump, electronically controlled)
16	Remove test equipment (1).		AR46.20-W-3055H
17	Connect diagnostic system, start XENTRY and perform quick test.	Only on vehicles with code C6P (Power steering pump, electronically controlled)
18	Clear fault memory in level control (CLCS) control unit (A26).	Only on vehicles with code C6P (Power steering pump, electronically controlled)
19	End XENTRY and remove the diagnostic system.	Only on vehicles with code C6P (Power steering pump, electronically controlled)