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TM 10-4320-256-14&P
Table 4-2. Unit Troubleshooting/shooting Procedures.
Malfunction
Test or Inspection
Corrective Action
1. FAULTY ENGINE OPERATION
Step 1. Check for defective fuel line or fuel tank adapter.
Replace defective fuel line or fuel tank adapter (para. 4-15 and 4-16).
Step 2. Refer to TM9-2805-257-14 for detailed troubleshooting procedures for the engine
2. PUMP FAILS TO PRIME
Step 1. Check for loss of proper engine speed.
Adjust engine speed (para. 2-10c).
Step 2. Check casing for low level priming.
Prime the pump (para. 2-9e).
Step 3. Check for defective suction hose.
Replace the defective hose.
Step 4. Check for defective coupling and gasket.
Replace defective coupling gasket (para. 3-6).
Replace pump (para. 4-18).
3. NOISY PUMP OPERATION
Step 1. Check for excessively high suction lift or insufficient flow to pump.
Move pump closer to supply or remove obstruction from hose.
4. FUEL LEAKAGE AT PUMP
Step 1. Check for defective hose.
Replace defective hose.
Step 2. Check for defective coupling and gasket.
Replace defective coupling gasket (para. 3-6).
Replace pump (para. 4-18).
4-5
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