TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
15. LHS DOES NOT OPERATE PROPERLY IN AUTO MODE (CAB ONLY)
(continued).
KNOWN INFO
16.
TEST OPTIONS
LHS OK using manual
Are 2228 volts mea-
Voltage Test.
controls.
sured on the socket for
Hook arm and main
relay K6, position 30?
REASON FOR QUESTION
frame unload OK.
When loading In the
Main frame fails to load.
AUTO mode, power is
POSSIBLE PROBLEMS
supplied from the function
LHS MODE SELECT
switch through the LHS
MODE SELECT switch on
switch faulty.
to the rest of the main
frame load circuit. If
voltage is present at the
socket for relay K6, the
LHS MODE SELECT
switch is function-ing
properly.
Repair cab
NO
control box (para
Refer to Fault 13,
Main Frame Does
YES
Not Load in
Manual Mode.
4-330
