TM 9-4940-568-20
2-67
Table 2-7. Engine Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
22. LUBRICATING OIL PRESSURE HIGH.
Engine running too cold.
Refer to troubleshooting Malfunction 20 for Coolant Temperature Below Normal.
Lubricating oil viscosity too thick.
Make sure the correct lubricating oil is being used (TM 9-4940-568-10).
Oil pressure sending unit or gage malfunctioning.
Replace oil pressure sending unit (Para 8-37) or gage (Para 8-44).
23. LUBRICATING OIL CONSUMPTION EXCESSIVE.
External leaks.
Visually inspect for lubricating oil leaks.
Incorrect lubricating oil (specification or viscosity).
Make sure the correct lubricating oil is being used (TM 9-4940-568-10).
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.
Lubricating oil contaminated.
Perform engine oil service (Para 8-2).
