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 TM 55-1905-221-14-2
Table 5-1. Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
PROPULSION ENGINE (Cont.)
5. Governor unstable (hunting).
Step 1. Check for faulty governor.
Replace if defective.
Step 2. Check linkage to injectors.
Replace defective or damaged parts.
6. Black exhaust smoke (incompletely burned fuel).
Step 1. Check for obstruction in exhaust piping.
Disassemble system and replace or repair parts as required.
Step 2. Check for faulty air silencer.
Remove and clean screen.
7. High engine coolant temperature.
Step 1. Check for defective fresh water pump.
a. Remove and repair as required.
b. Replace pump if damaged beyond repair.
Step 2. Check for obstruction(s) in raw water system.
Disassemble raw water (muffler) cooling system, remove obstruction(s) and
reassemble.
Step 3. Check for defective muffler.
Replace or repair as requed.
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5-8
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