TM 9-2320-279-10-2
Troubleshooting Malfunctions (Cont)
Table 3-4. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
MATERIAL HANDLING CRANE (M984E1) (CONT)
12.
SWING OPERATION ABNORMAL IN BOTH DIRECTIONS.
Step 1. Check that abnormal operation is not caused by sharp movement
of controls to neutral.
Feather control lever to neutral to maintain smooth
stopping action.
Step 2. Check if vehicle is level.
Level vehicle.
Step 3. Check for dried out or damaged turntable bearing by slowly
rotating boom hack and forth without load. Grating noises and/or
erratic movement indicate dried out or damaged hearings.
Rotate turntable 360 degrees in both directions several
times and lubricate turntable bearing (LO 9-2320-279-12)