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TM 9-2320-364-20-3
2-2386
10. HOOK ARM DOES NOT LOAD IN MANUAL MODE (CONT).
Hoses OK.
Tubes OK.
Wire 1490 faulty.
Wire 1486 faulty.
Hydraulic selector switch faulty.
LHS control assembly faulty.
Wire 1467 faulty.
Wire 1435 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If there are not 22 to 28 vdc
present, component supplying
voltage to hook arm down DC
valve is faulty.
NO
Go to Step 4 of this
Fault.
3.
Are 22 to 28
vdc mea-
sured at
hook arm down
directional control (DC) valve
harness connector, terminal 2
with ENGINE switch ON,
hydraulic selector switch in
MAN HA, and joystick in
LOAD position?
Go to Step 9 of this
Fault.
WARNING
YES
Read WARNING
on Page 2-2387
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