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)
7.
HOIST OPERATION SLOW OR ABNORMAL WHEN LIFTING OR
LOWERING LOAD.
CAUTION
Be sure to keep tension on cable so that cable does not
get tangled on drum.
Set load down and disconnect load hook. Reel cable in
and out several times to remove air from hoist motor.
Step 1. Check for air in motor.
Step 2. Check outside temperature. If temperature is less than 0F
( - 17C). hydraulic oil may not flow easily.
Operate engine for 20 minutes with PM ENGAGE switch
set to ON to bring oil to operating temperature.
If oil is still not warmed, lower crane to stowed position.
Push MAST control down. Hold MAST control down for
approximately 30 seconds, then return control to neutral
position. Repeat procedure several times until oil is
warmed.
If operation is still slow or abnormal. notify organizational
Step 3.
maintenance.
