CHECKING FUNCTION OF
POWER STEERING PUMP
- Engine at Operating
Temperature -

1. Checking Power Pump:

Unscrew pressure hose (2) on steering
gear and connect on Special Tool
32 4 000.
Connect pressure hose (1) of Special
Tool 32 4 000 on steering gear.

Installation:
Tightening torque = 40 Nm (29 ft. lbs.).
Bleed power steering - see 32 13.


32 13 000

Testing:
Shutoff valve (A) must always be
closed for hight pressure tests (to
avoid damaging the pressure tester).
Open shutoff valve (B) and bleed
power steering - see 32 13.
Close shutoff valve (B) with engine
running - max. 10 seconds - and read
pressure.
The rated pump pressure of 110 bar
(1564 psi) ± 10 % must be reached.

Check/tighten the drive belt if this
pressure is not reached.
Perform test again.
Replace power pump if pressure is still
not reached.


32 13 000

Checking Power Steering:

Run engine.
Pull steering wheel against the left
final stop with 100 N (22 lbs.) (use a
force meter) about 5 seconds.
Read pressure on pressure tester.
Repeat same test on the right lock.
Replace the steering gear if the pressure
values are lower than the previously
determined pump pressure.