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 TM 9-2815-226-34-1
Table 2-1. TROUBLESHOOTING PROCEDURES (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
23.
LOW IDLE OIL PRESSURE (LESS THAN 10 PSI, [69 KPA]).
Step 1.
Check for oil dilution.
Refer to MALFUNCTION 20 for corrective action.
Step 2.
Check for coolant overheating.
Refer to MALFUNCTION 22 for corrective action.
Step 3.
Check for low oil level in crankcase.
Service crankcase (LO 9-2320-281-12).
Step 4.
Check for leaks on suction line and fittings.
Tighten line or replace gaskets (para 3-54).
Step 5.
Check oil cooler for restricted coolant flow
.
Remove and clean cooler (para 3-56).
Step 6.
Check for defective oil pump high pressure limit valve.
Remove pump and replace defective limit valve (para 3-51).
Step 7.
Check for defective oil pump pressure regulator.
Remove pump and replace defective regulator (para 3-51).
Step 8.
Check oil pump for defective bushing and gears.
Replace defective pump. Repair as necessary (para 3-51).
Step 9.
Check for broken piston cooling nozzle.
Replace defective nozzle (para 3-6).
Step 10. Check for worn main and rod bearings.
Replace defective main and rod bearings (para 3-6).
2-22
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