To reduce the possibility of personal injury, avoid direct contact of hot oil with your skin.
WARNING
Some state and federal agencies have determined that used engine oil can be carcinogenic and cause reproductive toxicity. Avoid inhalation of vapors, ingestion and prolonged contact with used engine oil. If not reused, dispose of in accordance with local environmental regulations.
The high-pressure relief valve spring is under compression. Slowly remove the threaded retaining plug to reduce the possibility of personal injury.
Remove the high-pressure relief valve and spring by removing the threaded retaining plug from the lubricating oil pump cover. Refer to Procedure 007-021 in Section 7.
When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.
WARNING
Some solvents are flammable and toxic. Read the manufacturer’s instructions before using.
CAUTION
Do not allow dirt or gasket material to enter the oil passages. Bearing damage can result.
Clean the lubricating oil pump components with solvent.
Inspect the pressure regulator spool for scuffing.
Minor spool scuff is acceptable. If the scuff can be felt by a fingernail, the spool will need to be replaced.
Insert the spool in the bore and check for smooth movement in and out of the bore. If any hesitation is felt, the spool must be replaced and the bore inspected for burrs.
Remove any burrs found in the bore before installing a new spool.
Measure the gear backlash by mounting a dial indicator. Position the dial indicator contact point onto the lubricating oil pump external idler gear teeth.
With the external drive gear locked into place and the dial indicator contact in place, rotate the external idler gear clockwise and counterclockwise to measure the backlash.