Checking Delivery Pressure of Power Pump

1. Run engine at idle speed. Shut-off valve must be open (lever position I).

2. Turn steering wheel to left and right full lock and read off fluid pressure at pressure gauge.

Specification 68 to 82 bar for power steering pump 928.347.431.04, 928.347.431.05 and 928.347.089.00. Specification 110 to 110 bar for power steering pump 928.347.089.01 (as of MY '91).

Identification: Nameplate on pump. Part No. and pressure specification are indicated on the nameplate.

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