TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
12. HOOK ARM DOES NOT UNLOAD IN MANUAL MODE (MODEL A ONLY) (continued).
KNOWN INFO
9.
TEST OPTIONS
Operates only with
Is continuity measured
Continuity Test.
remote control.
on the cab control box
REASON FOR QUESTION
function switch, with
POSSIBLE PROBLEMS
the switch in the
The source of the power
UNLOAD position?
in the hook arm UNLOAD
Function switch faulty.
circuit originates with the
LHS MODE SELECT
function switch in the cab
switch faulty.
control box.
Cab control box faulty.
Repair cab control
NO
box (para 4-71).
YES
4-232
Change 1
