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)
2.
BOOM RAISES OR LOWERS SLOWLY.
Step 1. Check outside temperature. If temperature is less than 0 0F
( 17 0C), hydraulic oil may not flow easily.
Operate engine for 20 minutes with PTO ENGAGE switch
set to ON to bring oil to operating temperature.
If oil is still not warmed, lower crane to stowed position.
Operate 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.
Step 2. If problem remains, notify organizational maintenance.