Problem  | Action  | 
|---|---|
Excessive back pressure in the hoses or the steering gear caused by restriction.  | Locate and repair the restriction. Refer to Power Steering System Test .  | 
Scoring on the pressure plates, thrust plates, or rotor.  | Replace the power steering pump. Refer to Power Steering Pump Replacement .  | 
An excessively worn cam ring.  | Replace the power steering pump. Refer to Power Steering Pump Replacement .  |