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 TM 55-1905-221-14-1
Table 4-1. Troubleshooting (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
9. EXCESSIVE CHARGING RATE.
Check regulator.
Replace defective regulator (para 4-29).
10. NOISY ALTERNATOR.
Step 1. Check for worn bearings.
Replace alternator (para 4-28).
Step 2. Check for defective or worn belt.
Replace belt.
Step 3. Check for loose pulley.
Tighten pulley.
11. STARTER WILL NOT CRANK ENGINE.
Step 1. Check batteries.
Recharge or replace batteries if required.
Step 2. Check for loose connections or defective wiring.
Replace damaged wiring and tighten all connections to starter, magnetic switch, and batteries.
Step 3. Check for defective switch.
Inspect all switches to determine their condition. Connect a Jumper lead around any switch suspected
of being defective. If system functions, replace the by-passed switch.
Step 4. Check commutator to determine in dirty or worn.
Inspect commutator by removing inspection plugs. If commutator is dirty or slightly grooved, polish it
by placing a strip of No. 00 sandpaper around the commutator and under brushes (rough side toward
commutator) and rotate the armature. Blow the dust from the commutator after polishing.
4-10
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