TM-9-2320-279-10-2

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

OPERATOR’S MANUAL VOLUME 2 OF 2

DECEMBER 1998

CHANGE 3

TM-9-2320-279-10-2 - Page 776 of 819

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.

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