TM 5-4310-377-13
Table 3-2. Unit Maintenance Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
FLYWHEEL REVOLVES IN WRONG DIRECTION.
Check motor for proper wiring connections (para 1-14).
Reconnect motor wiring properly (para 1-14).
2.
BEARINGS OVERHEAT.
Check that proper oil level is visible through sight gage (para 3-2).
If oil level is low, add oil to crankcase (para 3-2).
If oil level is normal, notify Forward Intermediate Maintenance.
3.
MOTOR/COMPRESSOR SPEED SLOWS DOWN.
Check line voltage for 115 vac.
If line voltage is abnormal, notify your supervisor.
If line voltage is normal, replace the motor (para 3-22).
4.
SEVERE VIBRATION.
Step 1.
Check for damaged motor pulley and damaged compressor flywheel.
If motor pulley is damaged, replace damaged motor pulley (para 3-15)
If compressor flywheel is damaged, replace damaged compressor flywheel (para 3-17).
If motor pulley and compressor flywheel are undamaged, proceed to step 2.
Step 2.
Observe motor and compressor pulleys while air compressor is running.
If motor pulley is wobbling, replace motor (para 3-22).
If compressor flywheel is wobbling, replace compressor (para 3-16).
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