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Diesel Engine Troubleshooting Symptoms
36
Lubricating Oil Pressure Is Low
This is symptom tree T-014.
Cause Correction
Lubricating oil lever is below specification
Check the oil level. Verify the dipstick
calibration and the oil pan capacity. Fill the
system to the specified level.
OK
Oil level or pressure sensor is damaged
Replace the oil lever or oil pressure sensor.
OK
Lubricating oil filter is clogged
Replace the filter
OK
Fuel or coolant is in the lubricating oil.
Refer to Oil Level Rises symptom tree.
OK
Regulator or relief valve is not adjusted
Correctly
Adjust the regulator or relief valve.
OK
Lubricating oil pan strainer is clogged
Clean the strainer.
OK
Lubricating oil suction tube is damaged
Repair or replace the suction tube.
OK
Lubricating oil pump is damaged
Replace the oil pump.
OK
Main or rod bearing is worn or damaged
Replace the bearing