TM 10-3510-208-12
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2. Check for a cracked, broken or a leaking fuel pump.
Refer to instructions a. and b., fisted under Step 2. of 7. WATER HEATER FUEL PUMP FAILS TO
DELIVER FUEL, and replace the fuel pump.
9. AIR OR WATER HEATER FUEL PUMP NOISY
Step l. Check for loose pump coupling.
Tighten coupling screws.
Step 2. Check for frozen fuel pump shaft (no movement) or worn shaft seal.
Refer to instructions a. and b., listed under step 2. of 7. WATER HEATER FUEL PUMP FAILS TO
DELIVER FUEL, and replace the fuel pump.
10. PULSATING PRESSURE INDICATED BY PRESSURE GAGE
Refer to figure 4-7 and replace the fuel pressure gage.
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