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)
9. MAST RAISES OR LOWERS ABNORMALLY.
Step 1. If mast operation is abnormal, there may be air in cylinders.
Fully raise and lower mast several times to remove air
from cylinders.
Step 2. If problem remains, notify organizational maintenance.
10. MAST RAISES OR LOWERS SLOWLY.
Step 1. Check outside temperature. If temperature is less than 00F
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.
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 2. If problem remains, notify organizational maintenance.
