TM 5-3895-346-14
ENGINE OVERHAUL
TROUBLESHOOTING (ENGINE)
Chart 7
LOW OIL PRESSURE
SUGGESTED REMEDY
1. Check the oil and bring it to the proper level on the dipstick or correct the installation angle.
2. Consult the Lubrication Oil Specifications in Fuel and Oil Specifications for the recommended grade and
viscosity of oil.
Check for fuel leaks at the injector nut seal ring and fuel pipe connections. Leaks at these points will cause
lubricating oil dilution. Refer to Fuel Leak Detection.
3. A plugged oil cooler is indicated by excessively high lubricating oil temperature. Remove and clean the oil
cooler core.
4. Remove the bypass valve and clean the valve and valve seat and inspect the valve spring. Replace
defective parts.
5. Remove the pressure regulator valve and clean the valve and valve seat and inspect the valve spring.
Replace defective parts.
6. Change the bearings. Consult the Lubricating Oil Specifications in Fuel and Oil Specifications for the proper
grade and viscosity of oil. Change the oil filters.
7. Replace missing plugs.
8. Check the oil pressure with a reliable gauge and replace the gauge if found faulty.
9. Remove and clean the gauge line; replace it, if necessary.
10. Remove and clean the gauge orifice.
11. Repair or replace defective electrical equipment.
12. Remove and clean the oil pan and oil intake screen. Consult the Lubricating Oil Specifications in Fuel and
Oil Specifications for the proper grade and viscosity of oil. Change the oil filters.
13. Remove and inspect the valve, valve bore, and spring. Replace faulty parts.
14. Disassemble the piping and install new gaskets.
15. Remove the pump. Clean and replace defective parts.
16. Remove the flange and replace the gasket.
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