TM 55-2210-224-34
Table 3-1. INTERMEDIATE DIRECT SUPPORT AND INTERMEDIATE GENERAL SUPPORT
TROUBLESHOOTING (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
54. TRACTION MOTOR BEARING FAILS.
Step 1. Check for unbalanced armature.
Replace armature (para 3-64).
Step 2. Check for contaminated grease or no lubrication,
Remove traction motor for repair (para 3-64).
Step 3. Check for improper traction motor alinement.
Aline traction motor (para 3-64).
Step 4. Check for improper installation of bearing.
Remove traction motor for repair (para 3-64).
55. TRACTION MOTOR BRUSHES ARE BROKEN.
Step 1. Check for rough and/or burned spots, flat spots, or high bars on commutator.
Resurface commutator (para 3-64).
Step 2. Check for low brush spring tension.
Adjust spring tension (TM 55-2210-24-12).
Step 3. Check for weak or broken suspension pads causing motor vibration.
Replace suspension pads (para 3-63).
Step 4. Check for defective bearings causing motor vibration.
Replace bearings (para 3-64).
Step 5. Check for out-of-round commutator.
Resurface commutator (para 3-64).
Step 6. Check for high bar on commutator.
Repair or replace commutator (para 3-64).
Step 7. Check for dirty or sticking brushes.
Clean brush holder and blow out generator (para 3-64).
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