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TM 5-4320-308-13
Table 3-2. Unit Maintenance Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10.
EXCESSIVE LUBRICATING OIL CONSUMPTION
Step 1.
Check for leakage at oil drain plug or oil filler cap. If drain plug or oil filler cap is leaking, try to
tighten.
If leak continues, notify intermediate maintenance.
Step 2.
Check for leakage at joint between timing cover and crankcase.
Notify intermediate maintenance.
Step 3.
Check for leakage around cylinder head.
Notify intermediate maintenance.
Step 4.
Check for smoky exhaust. If exhaust discharge contains oil, excessive oil is being burned in engine
cylinder or around cylinder valve stems.
Notify intermediate maintenance.
11. PUMP FAILS TO PRIME
Step 1.
Check for low engine speed.
Adjust throttle lever to increase engine speed.
Step 2.
Check for air-locked pump.
Vent the pump volute and fill with fuel (para 2-2.b.).
Step 3.
Check for leaks at the suction (intake) flange and gasket.
Tighten nuts on suction (intake) flange at pump case.
12.
NOISY PUMP OPERATION
Notify intermediate maintenance.
13.
LOW DISCHARGE PRESSURE
Step 1.
Check for low engine speed.
Adjust throttle lever to increase engine speed.
Step 2.
Check suction (intake) line for leaking connections.
Tighten loose connections.
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