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TM 5-4320-306-24
Table 2-2. Organizational Maintenance Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
CAUTION
During some troubleshooting procedures it may be necessary to run the engine. Since the pump
is directly coupled to the engine, the pump will run when the engine runs. Do not run the pump
without water in the volute. This will destroy the mechanical seal, causing pump failure. When
necessary to run the pump for longer than a few seconds, make sure that suction and discharge
hoses are installed and a source of water to be pumped is available. Start engine, prime and
operate pump to duplicate normal operation and to prevent pump from overheating.
1. ENGINE FAILS TO CRANK OR CRANKS VERY SLOWLY
Step 1. Check fuse for corrosion or damage
Replace fuse (para 2-16).
Step 2. Check for weak batteries or dirty, corroded, or loose battery cable connections
Add distilled water as needed Recharge batteries or replace if defective (para 2-13)
Step 3. Check for dirty, corroded, or loose cable connections on starter and alternator (para 2-15).
Clean and tighten starter and/or alternator connections if necessary
Step 4. Check V-belts for breaks or cracks Check belt tension
Tighten or replace V-belts as necessary (para 2-25)
Step 5. Remove and check starter
Replace defective starter (para 2-34)
Step 6. If engine still will not crank or cranks slowly, the engine may be frozen or bound.
Notify direct support.
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