Warning: Refer to Cleaning Solvent Warning in the Preface section.
- Clean all parts of sludge, oil, and varnish by soaking in cleaning solvent.
- Inspect for foreign material and determine the source of the foreign material.
- Inspect the pump housing and cover for the following conditions:
| • | Cracks or casting imperfections |
- Do not attempt to repair the pump housing.
Replace the pump housing.
- Inspect the oil pump gears for the following conditions:
- Inspect the idler shaft for looseness or scoring (4).
If loose or damaged, replace the oil pump.
- Inspect the drive gear shaft for looseness or scoring (5).
- Inspect the pressure regulator valve for the following conditions:
| | Burrs may be removed using a fine oil stone. |
- Inspect the pressure regulator valve spring for the following conditions:
- Inspect the suction pipe and screen assembly for the following conditions:
| • | Looseness--If the suction pipe is loose, bent or has been removed, replace the pump body cover and suction pipe. |
| • | Broken wire mesh or screen |
- Measure the oil pump gear lash. Install the gears, and measure in several places.
- Measure the oil pump housing gear pocket (1, 2).
- Measure the oil pump gears (1, 2).
Note: When deciding pump serviceability based on end clearance, consider depth of the wear pattern in the pump cover.
- Measure the oil pump gear side clearance.
