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TM 9-2320-364-20-3
2-2404
11. MIDDLE FRAME DOES NOT UNLOAD IN MANUAL MODE (CONT).
LHS hoses OK.
Wire 1489 faulty.
Wire 1480 faulty.
Hydraulic selector switch faulty.
LHS control assembly
faulty.
Middle frame lockout relay
faulty.
Wire 1465 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 middle frame DC
valve is faulty.
YES
NO
Go to Step 3 of this
Fault.
2.
Are 22 to
28 vdc
measured
at middle
frame up directional control
(DC) valve harness connector,
terminal 2 with ENGINE
switch ON, hydraulic selector
switch in MAN MF, and
joystick in UNLOAD position?
Go to Step 9 of this
Fault.
WARNING
Read WARNING
on Page 2-2405
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