Inspection

1. Clean all parts with solvent and blow dry.
2. Check vane tips for scoring or wear. Vanes must fit snugly but slide freely in slots of rotor. Examine rotor slots for burrs and excessive wear at thrust faces.
3. Check inner surface of pump ring for scoring or wear and thrust plate and pressure plate for wear on plate surfaces.
4. If heavy wear is evident in any of above components, replace entire rotating group.
5. Inspect seal for leakage, cracking or swelling, if evident replace seal.
6. Check driveshaft for excessive burning or scoring.
7. Control valve must move smoothly in the valve bore.