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TM 5-4320-313-14
5-3. TROUBLESHOOTING - Continued.
Table 5-1. Direct Support Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. PUMP MAKES EXCESSIVE NOISE - Continued.
Remove foreign material from suction intake.
Running pump dry can cause excessive noise and damage to pump.
Step 2. Check that suction hose is connected to a container with fuel.
Replace empty fuel container.
Step 3. Check that pump has been primed.
Remove pump housing top pipe plug and fill housing with fuel. Install pipe plug in housing.
2. PUMP OUTPUT LOW.
Step 1. Check that engine throttle is properly adjusted.
Adjust throttle lever (paragraph 4-17).
Step 2. Refer to Malfunction 1, steps 1 thru 3.
3. PUMP FAILS TO PRIME.
Step 1. Check for low engine speed.
Adjust throttle lever (paragraph 4-17).
Step 2. Check suction intake for leaks.
Tighten suction intake.
Step 3. Check suction hose for leaks.
Replace a bad suction hose.
5-2
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