TM 55-2210-224-34
Table 3-1. INTERMEDIATE DIRECT SUPPORT AND INTERMEDIATE GENERAL SUPPORT
TROUBLESHOOTING (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
51. LOCOMOTIVE WILL NOT MOVE WHEN SHIFTED FORWARD OR REVERSE.
Step 1. Check for defective reverser relays.
Repair or replace reverser relay (para 3-28).
Step 2. Check for defective controller mechanism.
Repair or replace controller mechanism (para 3-34).
TRACTION MOTOR
52. TRACTION MOTOR ARMATURE OR FIELD COILS ARE GROUNDED.
Step 1. Check for dirty, oily, or water-soaked insulation.
Remove traction motor for repair (para 3-64).
Step 2. Check for defective field coils.
Remove traction motor for repair (para 3-64).
Step 3. Check for broken insulators.
Replace insulators (para 3-64).
Step 4. Check for dirty or broken commutator bars.
Remove traction motor for repair (para 3-64).
Step 5. Check for broken high-voltage leads.
Remove traction motor for repair (para 3-64).
Step 6. Check for broken power contactors.
Replace power contactors (para 3-24).
Step 7. Check for broken brush shunt wires.
Remove traction motor for repair (para 3-64).
53. THERE IS TRACTION MOTOR FLASHOVER.
Refer to main generator flashover (malfunction 47).
3-25
