3
4
1
2
TM 9-4940-568-10
3-41
Table 3-1. Troubleshooting - CONT.
Malfunction
Test or Inspection
Corrective Action
CRANE (CONT)
9.
OVERLOAD SHUTDOWN SYSTEM DOES NOT OPERATE PROPERLY.
NOTE
The following tests and inspections should be performed in the event of any of the
following:
Boom up and down, telescope out and hoist up functions are disabled.
Intermittent cut-out of the above listed functions (with crane unloaded).
Cut-out of the above listed functions too early or too late (with crane loaded).
Step 1. Ensure that the MAIN POWER switch (1) on the crane junction box (2) is in the ON position.
This switch functions both as a circuit breaker and switch.
If the switch is in the OFF position, reset. If the switch trips again, notify
Unit Maintenance.
If the switch is in the ON position, go to Step 2.
Step 2. If the remote control unit (3) is connected, ensure that the EMERGENCY STOP switch (4) on
the crane remote control unit is in the ON position. This switch disables all crane functions
when in the OFF position.
If the switch is in the OFF position, raise cover and move switch to ON position.
If the switch is in the ON position, go to Step 3.
