TM 10-3930-641-34-1
ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
21. ALTERNATOR DOES NOT CHARGE (CONT)
Step 3. Inspect brushes. (page 3-183.)
Replace brushes. (See page 3-176.)
Step 4. Inspect rotor for defects.
Replace rotor. (See page 3-176.)
22. ALTERNATOR HAS LOW OR IRREGULAR DISCHARGE
Step 1. Inspect wiring for defects.
a.
Check charging circuit.
b.
Check common return circuit.
c.
Check battery connections.
Repair/replace as necessary. (See TM 10-3930-641-20.)
Step 2. Inspect brushes. (See page 3-183.)
Replace brushes. (See page 3-176.)
Step 3. Inspect alternator regulator.
a.
Adjust regulator to higher charging rate. (See TM 10-3930-641-20.)
b.
Replace alternator regulator. (See page 3-176.)
Step 4. Inspect rotor for defects.
Repair/replace. (See page 3-176.)
Step 5. Test rectifier diodes.
Replace defective diodes. (See page 3-176.)
23. ALTERNATOR DISCHARGE RATE IS TOO HIGH
NOTE
When alternator discharge rate is too high, lights burn out and battery uses more than one ounce of water per week.
Step 1. Inspect all connections for alternator and alternator regulator.
Tighten all connections.
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