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TM 9-2320-364-34-1
2-15. MATERIAL HANDLING CRANE TROUBLESHOOTING (CONT).
20. HOIST DOES NOT RAISE.
INITIAL SETUP
Tools and Special Tools
Materials/Parts- Continued
Tool Kit, General Mechanic's
Lockwasher (4) (Item 282, Appendix E)
(Item 240, Appendix F)
Lockwasher (2) (Item 286, Appendix E)
Cap and Plug Set (Item 26, Appendix F)
Packing, Preformed (2) (Item 337, Appendix E)
Pan, Drain 4 gal (Item 144, Appendix F)
Packing, Preformed (2) (Item 345, Appendix E)
Pressure Test Kit (Item 165, Appendix F)
Packing, Preformed (2) (Item 363, Appendix E)
Wrench, Torque (0-175 lb-ft)
References
(Item 277, Appendix F)
TM 9-2320-364-10
Lifting Device (Minimum Capacity
TM 9-2320-364-20
200 lbs/91 kg)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Materials/Parts
Wheels chocked, (TM 9-2320-364-10)
Oil, Hydraulic (Item 34, Appendix B)
Outriggers down with weight off
Tag, Identification (Item 72, Appendix B)
vehicle suspension, (TM 9-2320-364-10)
Gasket (Item 106, Appendix E)
START
1.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Unit Troubleshooting
Flowmeter test.
tasks completed.
Hoist lowers.
Are at
REASON FOR QUESTION
least 10 gpm
POSSIBLE PROBLEMS
If HOIST valve is faulty, pressure
(38 lpm) measured from
and flow to hoist assembly will
HOIST valve with valve
Four valve bank faulty.
be restricted. If OSS function
isolated from hoist motor and
Hoist brake faulty.
lockout valve or hoist relief valve
in UP position?
Hoist motor valve faulty.
is faulty, fluid flow will return to
reservoir before going to hoist
motor.
Go to Step 5 of this
NO
Fault.
YES

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