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)
3. SWING OPERATION ABNORMAL IN ONE DIRECTION ONLY.
Step 1.
Check if vehicle is level.
Level vehicle.
Step 2. Check for dried out or damaged turntable bearing by slowly
rotating boom back and forth without load. Grating noises and/or
erratic movement indicate dried out or damaged bearings.
Rotate turntable 360 degrees in both directions several
times and lubricate turntable bearing (LO 9-2320-279-12).
Step 3. Notify organizational maintenance if problem remains.