40. Oil Pump Clean and Inspect

Oil Pump Cleaning 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 (3), casting imperfections, and damaged threads.
^ The drive gear shaft (5). 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 (1, 2).

Important: If the drive gear and driveshaft are worn, replace the entire oil pump. The drive gear and driveshaft for looseness and wear.