71
Fault Finding
CHART C3—Lubricating Oil pressure low
Cause
Remedy
Incorrect lubricating oil. (specification of
viscosity).
Make sure the correct lubricating oil is being used, Refer to Fluids
& Lubricants section.
Look for reduced viscosity from dilution with fuel. Fuel dilution in
lubricating oil can originate from fuel injection pump driveshaft
seal or fuel transfer pump.
Review/reduce the lubricating oil change intervals.
Pressure switch or gauge fault. Verify the pressure switch is functioning correctly.
Lubricating oil filter blocked. Change lubricating oil filter.
Review/reduce the lubricating oil change intervals. If operating in
arduous conditions change oil more frequently.
Lubricating oil filter drain down valve not
fitted.
Change lubricating oil filter.
Suction tube loose or broken seal leaking. Check/replace seal.
Oil pump pressure relief valve stuck open. Replace oil pump assembly
Lubricating oil pump worn. Replace oil pump assembly
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