4
1
2
3
TM 9-4940-568-10
3-42
Table 3-1. Troubleshooting - CONT.
Malfunction
Test or Inspection
Corrective Action
CRANE (CONT)
9.
OVERLOAD SHUTDOWN SYSTEM DOES NOT OPERATE PROPERLY (CONT).
Never attempt crane operations or lifting with crane mast not fully erected. Operating the
crane with the crane mast not fully erected even slightly will disrupt the Overload Shutdown
System. Failure to comply may result in injury to personnel and damage to equipment.
Step 3. Is the crane mast (1) in the fully erected position?
If the mast is not fully erected, raise mast. Refer to Para 2-29.
If the mast is fully erected, go to Step 4.
Step 4. Move the MAIN POWER switch (2) to the OFF position. Wait approximately 30 seconds and
move the MAIN POWER switch back to the ON position. This action will reset the Overload
Shutdown System (3). Wait approximately 30 more seconds for the system to complete a
self test and then try to operate the crane (4).
If the crane operates normally, the problem has been corrected.
If the problem remains, go to Step 5.
