TM 5-3805-280-24-1
Diagnostic Information
Symptom
Problem
Solution
Engine Oil pressure regulating valve
Repair valve. See Engine Repair
chapter.
Internal oil passages leak and/or
Check, repair. See Engine Repair
spray cooling jet missing
chapter.
Pressure pipe from oil pump leaking
Check. See Engine Repair chapter.
Oil pump drive gear loose
Check, repair drive gear. See Engine
9010
15
Repair chapter.
8
Oil pump gear and/or housing worn
Repair. See Engine Repair chapter.
Excessive main or connecting rod
Replace main bearings or
bearing clearance
connecting rod bearings. See Engine
Repair chapter.
High Engine Oil Pressure
Oil viscosity wrong (too thick)
Drain and refill with correct oil. See
Section 9000, Group 04.
Pressure regulating valve stuck or
Verify, repair. See Engine Repair
misadjusted
chapter.
Piston cooling spray orifices plugged
Verify, clean. See Engine Repair
chapter.
Engine oil has anti-freeze
Verify, repair, change oil.
Engine Uses Too Much Oil
Wrong oil
Use correct oil. See Section 9000,
Group 04.
Oil level too high
Correct. Check to see if some other
fluid is leaking into oil.
Oil leaks
Check engine oil drain plug.
Air cleaner plugged
Clean air cleaner elements or install
new elements
Crankcase breather restricted
Remove, clean. See Engine Repair
chapter.
Continued on next page
TX,9010,SB112 1929MAY988/12
3-35
