TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
12. HOOK ARM DOES NOT UNLOAD IN MANUAL MODE (continued).
2.
KNOWN INFO
TEST OPTIONS
Visual inspection.
Error Code, EC 04 and/or
Does the hook arm
EC 17.
unload with only the
REASON FOR QUESTION
Hook arm unloads with
cab controls (remote
either the remote control
inoperative)?
If the hook arm unloads
or cab control.
with the cab controls but
not the remote control,
POSSIBLE PROBLEMS
the problem is located in
the remote control
Function switch faulty.
portion of the circuit.
MODE SELECT switch
faulty.
Cab control box faulty.
MODEL A, hook arm
Remote linking harness
unloads only with
faulty.
remote control; go to
Remote control cable
NO
Step 9.
faulty.
MODEL B, Go to Step
Remote control unit
12.
faulty.
YES
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