TM 55-2210-224-34
Table 3-1. INTERMEDIATE DIRECT SUPPORT AND INTERMEDIATE GENERAL SUPPORT
TROUBLESHOOTING (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
44. MAIN GENERATOR ARMATURE OR FIELD COILS ARE GROUNDED. (cont)
Step 4. Check for dirty or broken commutator bars.
Remove main generator for repair (para 3-37).
Step 5. Check for broken high-voltage leads.
Remove main generator for repair (para 3-37).
Step 6. Check for broken power contactors.
Replace power contactors (para 3-24).
45. MAIN GENERATOR BEARING FAILS.
Step 1. Check for unbalanced armature.
Replace armature (para 3-37).
Step 2. Check for no lubrication or contaminated grease.
Lubricate in accordance with LO 55-2210-224-12.
Step 3. Check for loose main generator to diesel engine mounting bolts.
Tighten main generator to diesel engine mounting bolts (para 3-37).
Step 4. Check for improper installation of bearing.
Remove main generator for repair (para 3-37).
46. MAIN GENERATOR BRUSHES ARE BROKEN.
Step 1. Check for rough and/or burnt spots, flat spots, or high bars on commutator.
Resurface commutator (para 3-37).
Step 2. Check for low brush spring tension.
Replace springs (para 3-37).
Step 3. Check for vibration caused by defective bearings.
Replace bearings (para 3-37).
3-22
