Power Steering Pump: Testing and Inspection

Power Steering Pump Delivery Pressure, Checking

Special tools, testers and auxiliary items required

• Hose clamps up to 25 mm (3094)

• Power steering tester (V.A.G 1402)

• Adapter (V.A.G 1402/2)

• Adapter set (V.A.G 1402/6)

• Adapter (V.A.G 1402/1A)

- Disconnect the intake hose from the reservoir.






1. Hose clamp (3094)


- Remove the nuts - arrows - from the return line.






- Remove the nut - 1 - and the pressure line from the power steering pump.






- Mount the power steering test unit (V.A.G 1402) and the adapters as illustrated.






1 Power steering tester (V.A.G 1402)

2 Hose from adapter set (V.A.G 1402/6)

3 Pressure Line

4 Adapter (V.A.G 1402/2)

5 Power Steering Pump

6 Adapter (V.A.G 1402/1A)

- Remove hose clamp (3094) from intake hose.






1. Hose clamp (3094)


Make sure the lever on the pressure gauge is in position - 1 -.






- Start engine and fill hydraulic fluid in reservoir if necessary.

- Turn the steering wheel approx. 10 times from stop to stop.

- Check the delivery pressure.

Test Prerequisites

• Ribbed belt/ribbed belt tension OK

• Sealing of system

• Hoses/lines are not kinked or constricted

- Move the shut-off valve lever on he pressure gauge to - 2 - and read the pressure.






Let the engine run in idle and close the shut-off valve on the pressure gauge for not longer than 5 seconds (position - 2 -).

Specification for delivery pressure:

96 to 104 bar

- If specified value is not attained, replace power steering pump. Refer to => [ Vane Pump ] Service and Repair.

- Remove the pressure gauge and adapter.

- Bleed steering system => [ Steering, Bleeding After Replacing ] Service and Repair.

- Check hydraulic fluid level and fill, if necessary => [ Power Steering Fluid Level, Checking ] Power Steering Fluid Level, Checking.

- Check the steering system for leaks. Refer to => [ Steering, Checking for Leaks ] Steering, Checking for Leaks.