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)
4. BOOM WILL NOT TELESCOPE IN OR OUT (CONT)
Step 2. Refer to MALFUNCTION 1 BOOM OPERATION ABNORMAL
WHEN TELESCOPING IN OR OUT.
Step 3. If problem remains, notify organizational maintenance.
5. CRANE CONTROLS STICKING IN ENGAGED POSITION.
WARNING
Reservoir may become very hot. Be careful when placing
hand near reservoir. Reservoir can become hot enough to
cause serious burns.
Step 1. Check for overheated hydraulic oil by carefully placing hand near
hydraulic reservoir.
If reservoir is very hot, shut off engine, let oil cool, then
continue operation.
Step 2. Check outside temperature. If temperature is less than 0oF
(-17oC), hydraulic oil may not flow easily and controls may move
slowly.
Operate engine with PTO ENGAGE switch set to ON for
20 minutes to bring oil to operating temperature.
If oil is still not warmed, lower crane to stowed position.
Push MAST control lever DOWN. Hold MAST control
down for approximately 30 seconds, then return control
to neutral position. Repeat procedure several times until
oil is warmed.
Step 3. If controls continue sticking, notify organizational maintenance.