Excessive back pressure in hoses or steering gear caused by restriction.

Inspect and service as needed.

Refer to Power Steering System Test Procedure .

The power steering pump mounting bolts are loose.

Torque the power steering pump mounting bolts to proper specifications.

Refer to Power Steering Pump Replacement .

The pressure plates, thrust plate or rotor is scored.

Inspect and replace as needed.

Refer to End Plate and Rotating Group Replacement .

The pump ring is worn.

Inspect and replace as needed.

Refer to End Plate and Rotating Group Replacement .