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 TM 9-2320-364-34-1
2-14. LOAD HANDLING SYSTEM (LHS) TROUBLESHOOTING (CONT).
7. MIDDLE FRAME DOES NOT UNLOAD.
INITIAL SETUP
Tools and Special Tools
Personnel Required
Tool Kit, General Mechanic's
Two
(Item 240, Appendix F)
References
Cap and Plug Set (Item 34, Appendix F)
TM 9-2320-364-10
Pressure Test Kit (Item 165, Appendix F)
Wrench Set, Socket 3/8 in. Drive
Equipment Condition
(Item 273, Appendix F)
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
(Item 276, Appendix F)
Wheels chocked, (TM 9-2320-364-10)
Materials/Parts
Oil, Hydraulic (Item 34, Appendix B)
Tags, Identification (Item 72, Appendix B)
Lockwashers (4) (Item 266, Appendix E)
Parts Kit, Seal (Item 408, Appendix E)
START
1.
KNOWN INFO
TEST OPTIONS
Unit Troubleshooting tasks
Operation test.
Does middle frame unload
completed.
using middle frame up
Middle frame loads.
REASON FOR QUESTION
directional control valve
manual push button?
If directional control valve
POSSIBLE PROBLEMS
solenoid is faulty, directional
control valve will operate middle
Middle frame up directional
frame when manual push button
control valve faulty.
is pushed but not when it is
Load control valve faulty.
electrically activated by cab
Main cylinder manifold
controls.
relief valve faulty.
Load control valve faulty.
LH main cylinder faulty.
RH main cylinder faulty.
Go to Step 2 of this
NO
Fault.
YES
Replace middle frame
up directional control
valve (Para 17-10).
Verify repair, go to
Step 8 of this Fault.
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