Oil Pump: Testing and Inspection

1. Clean all of the parts in cleaning solvent. Dry the parts with compressed air.
2. Inspect the following areas:
- The oil pump housing and cover for cracks, scoring, casting imperfections, and damaged threads
- The drive gear shaft (If the shaft is loose in the oil pump housing, replace the oil pump.)
- The pressure relief valve for scoring and sticking (Burrs may be removed with a fine oil stone.)
- The relief valve spring for loss of tension
- The oil pump screen for broken wire mesh or looseness (If the pipe is loose or has been removed from the screen, the oil pump screen must be replaced.)
- The gears for chipping, galling, and wear

NOTE: If the drive gear and driveshaft are worn, replace the entire oil pump.

- The drive gear and driveshaft for looseness and wear
- If after inspection, the oil pump is to be reused, replace the pressure relief valve spring.