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TM 5-4320-313-14
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. LOW PUMP DISCHARGE PRESSURE.
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.
Step 4. Check for a damaged impeller.
Replace a damaged impeller (paragraph 5-4).
5. ENGINE CRANKS BUT FAILS TO START.
Step 1. Check for faulty fuel pump.
Replace a bad fuel pump (paragraph 4-13).
Step 2. Test for a faulty fuel injector (paragraph 5-6).
Replace a bad fuel injector (paragraph 5-6).
6. ENGINE STARTS BUT STALLS OR SURGES.
Step 1. Test for a faulty injector (paragraph 5-6).
Replace a bad fuel injector (paragraph 5-6).
Step 2. Check vent valve for proper operation.
Remove vent valve and check vent valve by shaking for free movement of internal ball.
Do not breathe cleaning solvent P-D-680 vapors for long periods of time or use solvent near open flames
To avoid illness, explosion, or fire, only use solvent in well-ventilated areas away from open flames.
If necessary, clean with cleaning solvent. If unserviceable, replace vent valve (paragraph 5-7).
5-3
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