MAIN
POWER
TM 9-4940-568-20
2-164
Table 2-21. Crane Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. BOOM DOES NOT TELESCOPE IN WITH REMOTE CONTROL (CONT).
Test 5.
Connect the remote control cable to the remote control unit and remote control
hook-up connector on crane sub-frame. Turn MAIN POWER switch to ON position.
Check for 24 volts from controller harness, white wire, with BOOM controller lever in
UP position to known good ground. Turn MAIN POWER switch to the OFF position.
If 24 volts are not present, replace controller circuit card. Refer to paragraph 5-12
in this manual.
If 24 volts are present, reassemble remote control unit and go to Test 6.
