TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
12. HOOK ARM DOES NOT UNLOAD IN MANUAL MODE (MODEL A ONLY) (continued).
TEST OPTIONS
KNOWN INFO
6.
Continuity Test.
Does not operate with
Is continuity measured
remote control or cab
on the HOOK ARM
REASON FOR QUESTION
controls.
UNLOAD solenoid
Power to activate the
harness?
POSSIBLE PROBLEMS
hook arm UNLOAD
solenoid is transferred
Hook arm UNLOAD
from the main junction
solenoid harness faulty.
box to the solenoid via
Main junction box wiring
this harness. Faults in
faulty.
this harness will prevent
Linking harness faulty.
operation from both the
Directional control valve
cab and remote controls.
faulty.
Replace hook arm
UNLOAD solenoid
NO
harness (para
YES
Change 1
4-226
