TM 55-2210-224-34
Table 3-1. INTERMEDIATE DIRECT SUPPORT AND INTERMEDIATE GENERAL SUPPORT
TROUBLESHOOTING (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
46. MAIN GENERATOR BRUSHES ARE BROKEN. (cont)
Step 4. Check for out-of-round commutator.
Resurface commutator (para 3-37).
Step 5. Check for high bars on commutator.
Repair or replace commutator (para 3-37).
47. THERE IS MAIN GENERATOR FLASHOVER.
Step 1. With generator running, check for eccentric commutator.
Aline main generator (para 3-37).
Step 2. With engine stopped, check for dirt or foreign particles in insulating (mica) spacers between commutator
segments.
Undercut or clean out spacers to 3/64 inch (1.2 mm) (para 3-37).
Step 3. Check for brushes broken or worn beyond condemning limits.
Replace brushes (TM 55-2210-224-12).
Step 4. Check for low brush spring tension or sticking brushes.
Adjust spring tension and clean brush holders and brushes (TM 55-2210-224-12).
Step 5. Check for slagged-over commutator bars.
Undercut mica bars (para 3-37).
Step 6. Check for high bars on commutator.
Repair or replace commutator (para 3-37).
Step 7. Check for broken insulators, insulation, or brush shunt wires.
Remove main generator for repair (para 3-37).
Step 8. Check for sudden surges of power from main generator
. With brakes applied, reduce to idle before
complete stop is made.
Remove main generator for repair (para 3-37).
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