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TM 5-4210-220-34
Table 2-1. DIRECT SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1a FIRE PUMP WILL NOT PRIME
Step 1.
Check fiber wheel for wear
Replace fiber wheel as required, (para. 2-13).
Step 2.
Check priming pump swings up and down.
a. Check and replace spring, If required, (para. 2-13).
b. Repair disengaging plunger assembly, (para. 2-13).
c. Repair priming pump fulcrum assembly, (para. 2-13).
Step 3.
Carry out pressure test on pump (para. 2-13).
Replace any components that are leaking, (para. 2-13).
1b FIRE PUMP NOISY WHEN OPERATING
Step 1.
Disconnect pump input drive shafts and rotate pump by hand.
Check for failed bearings,
indicated by noise or rough turning of shaft.
Repair pump as required, (para. 2-13).
Step 2.
Rotate reducer gearbox input and output.
Check for failed bearings or gears.
Repair gearbox as required, (para. 2-12).
1c PUMP LEAKING WATER WHILE PUMPING
Step 1.
Check for water leak from hole in casing between impeller and drive housing.
Replace the impeller seal, (para. 2-13).
Step 2.
Check If gasket or casing is leaking.
Replace gasket or leaking component, (para. 2-13).
2-3
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