High Mount Power Steering Pump, Checking Delivery Pressure

High Mount Power Steering Pump, Checking Delivery Pressure

Special tools, testers and auxiliary items required

• Hose clamps up to 25 mm dia. (3094)

• Power steering test unit (V.A.G 1402)

• Adapter (V.A.G 1402/1A)

• Adapter (V.A.G 1402/2)

• Pressure gauge adapter (V.A.G 1402/6)

• Pliers for spring-type clamps (VAS 5024A)

- Remove headlight.

- Clamp off return line and intake line accordingly using hose clamps up to 25 mm dia. (3094).





- Place drip tray underneath.

- Remove pressurized line from pump.

Connect Power Steering Test Unit (V.A.G 1402).





1 Power steering test unit (V.A.G 1402)

2 Hose of pressure gauge (V.A.G 1402)

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

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

5 Seal

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

7 Pressurized line with ring connection

8 Banjo fitting

- Remove hose clamps up to 25 mm dia. (3094) from intake line and return line.

- Start engine and top off fluid level in reservoir if necessary.

- Turn steering wheel from stop to stop approximately 10 times.

- Check pumping pressure.

Test Requirements

• Ribbed belt/ribbed belt tension OK.

• Sealing of system

• Hoses/lines are not kinked or constricted

- With engine at idle speed, close stopcock (not more than 5 seconds) and read pressure.

Specified Value: 100 ± 4 bar

• If specification is not reached or exceeded, replace pump:

• Power steering pump, removing and installing => [ High Mount Power Steering Pump ] High Mount Power Steering Pump.

• If power steering fluid is low in the servo fluid reservoir, check steering system for leaks.

• In case of leaks at steering pinion, check lines/line connections for leaks, if necessary tighten and wipe dry.

• In case of leaks at steering pinion or at pinion shaft seal in steering housing, the steering gear must be replaced.

• To test rack seal open hose clamp of boots and set boots aside.

- Bleed steering system => [ Steering System, Bleeding ] Steering System, Bleeding.