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 TM 55-1905-221-14-2
Table 5-1. Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ALTERNATOR
1. Alternator fails to charge.
Step 1. Check for open isolation diode.
Remove and disassemble alternator, replace diode and reassemble.
Refer to
Step 2. Check for open rotor winding.
Remove and disassemble alternator, and verify rotor winding continuity.
Replace rotor if open. Refer to paragraph 5-12.1.
Step 3. Check for bilge pump leaking sea wa causing voltage regulator to short out.
ter
Replace leaking gland.
2. Unsteady or low charging rate.
Step 1. Check for grounded, open, or shorted turns in stator coils.
Remove and disassemble alternator, and replace stator.
Refer to paragraph 5-
12.1.
Step 2. Check for grounded or shorted turns in rotor winding.
Remove and disassemble alternator, and replace rotor. Refer to paragraph 5-12.1.
5-9
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