TM 9-2320-279-34-1
Troubleshooting Malfunctions (Cont)
Table 2-3. troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
MATERIAL HANDLING CRANE (M977, M985, M984E1) (CONT)
21.
SWING OPERATION ERRATIC OR SLOW IN ONE DIRECT ION ONLY.
Step 1. Check for defective turntable. Operate crane (TM 9-2320-279-10). Operate SWING control
CW or CCW. Watch for any binding and listen for grinding or rumbling noise of turntable
when swinging.
If binding or noisy, remove, clean, inspect, and install turntable and bearing
(para 17-5 for M977 and M985) (para 17-5.1 for M984E1).
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