TM 10-3930-641-34-1
ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
18. LOW ENGINE OIL PRESSURE
Step 1. Inspect engine oil filter element.
Replace elements. (See TM 10-3930-641-20.)
Step 2. Check bypass valve for defects.
Step 3. Check oil cooler core.
a.
b.
Change oil. (See TM 10-3930-641-12.)
Step 4. Check oil pressure gage and sending unit for defects.
Replace oil pressure gage or sending unit. (See TM 10-3930-641-20.)
Step 5. Check for fuel in engine oil.
See Malfunction no. 13, step 2.
Step 6. Oil pump suction tube or bell is defective.
a.
b.
Step 7. Check oil pump relief valve.
Step 8. Inspect oil pump.
Step 9. Inspect for excessive clearance between camshaft and camshaft bearings. (See page 3-283.)
Step 11. Inspect crankshaft and crankshaft bearings for excessive clearance. (See pages 3-345, 3-347.)
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