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
10.
TEST OPTIONS
Voltage Test.
Operates only with
Are 2228 volts mea-
remote control.
sured at the selector
REASON FOR QUESTION
Function switch OK.
switch (orange wire)?
The LHS MODE SELECT
POSSIBLE PROBLEMS
switch determines the
mode of operation for the
LHS MODE SELECT
LHS. Faults within the
switch faulty.
LHS MODE SELECT
Cab control box faulty.
switch will prevent hook
arm UNLOAD operation.
Repair cab control
NO
box (para 4-71).
YES
Change 1
4-234
