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TM 9-2320-364-20-3
2-2366
9. HOOK ARM DOES NOT UNLOAD IN MANUAL MODE (CONT).
LHS hoses OK.
LHS tubes OK.
Wire 1489 faulty.
Wire 1482 faulty.
Hydraulic selector switch faulty.
LHS control assembly faulty.
Wire 1464 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 DC valve is
faulty.
Go to Step 4 of this
Fault.
3.
Are 22 to 28
vdc meas-
sured at hook
arm up directional
control (DC) valve harness
connector, terminal 2 with
ENGINE switch ON, hydraulic
selector switch in MAN HA,
and joystick in UNLOAD
position?
Go to Step 9 of this
Fault.
WARNING
YES
NO
Read WARNING
on Page 2-2367
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