Component Tests and General Diagnostics

Engine at operating temperature.

1. Checking Power Pump:





- Detach pressure line (2) on steering gear and connect on tester 32 4 000.





- Connect pressure line (1) of tester 32 4 000 on steering gear.

Installation:
Tightening torque M14 35 Nm, M16 40 Nm
Bleed power steering.

Test:





- Valve (A) must always be closed for high pressure testing (if not. pressure tester would be damaged!).

- Open valve (B) and bleed power steering.

- With engine running shut Valve (B) for max. 10 seconds and read pressure.

- The rated pump pressure must be reached within +/- 10%.

- If this pressure in not reached, check drive belt tightness.

- Repeat test:

If pressure is still not reached, replace power steering pump.

If rated pressure is exceeded. replace power steering pump.

2. Checking Power Steering:

- Run engine.





- Pull steering wheel against final left lock with a force 100 N (22 lbs.) about 5 seconds; use a force meter.

- Read pressure from tester 32 4 000.

- Repeat same test on right leak.

- If pressure values are less then the previously measured pump pressure. replace steering gear.