Power Steering Pump: Testing and Inspection

Vehicles with 4-cylinder engine





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 1402/3





- Clamp off suction and return line using hose clamps Hose Clamps Up to 25 mm dia. 3094.
- Remove pressure hose from power steering pump.
- Screw adapter V.A.G 1402/3 into power steering pump in place of banjo bolt.

Note:
^ If adapter V.A.G 1402/3 threads are too long, use more seals.

- Screw pressure gauge V.A.G 1402 hose on adapter V.A.G 1402/3.
- Close gauge shut-off valve (lever to left).
- Remove hose clamps up to 25 mm dia. 3094.

Note:
^ To avoid damage to pump, observe the following:
^ Pressure gauge shut-off valve must not remained closed longer than 10 seconds during this test.
^ Start engine without giving gas and run at idle.
^ Read pump pressure immediately after starting at idle speed (have it read by second technician, if necessary).
^ Because pressure falls over the course of the test, the highest pressure shown is the decisive measurement.

- Start engine and top off fluid level in reservoir if necessary.
- At idle speed, read off pressure on pressure gauge (measurement no longer than 10 seconds).

Pump pressure specified value (positive pressure)





If pressure is not to specification, replace pump.

- Switch off engine.
- Remove pressure gauge.
- Connect pressure line to power steering pump with banjo bolt.
- Check power steering fluid level.
- Check steering system for leaks.
- Bleed steering system Steering system, bleeding after reconstructing