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Page Title:
BOOM DOES NOT OPERATE OR OPERATES SLOWLY. |
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 TM 9-2320-364-34-1
2-15. MATERIAL HANDLING CRANE TROUBLESHOOTING (CONT).
16. BOOM DOES NOT OPERATE OR OPERATES SLOWLY.
INITIAL SETUP
Tools and Special Tools
References
Tool Kit, General Mechanic's
TM 9-2320-364-10
(Item 240, Appendix F)
TM 9-2320-364-20
Cap and Plug Set (Item 26, Appendix F)
Equipment Condition
Pan, Drain 4 gal (Item 144, Appendix F)
Engine OFF, (TM 9-2320-364-10)
Pressure Test Kit (Item 165, Appendix F)
Parking brake applied, (TM 9-2320-364-10)
Lifting Device (Minimum Capacity
Wheels chocked, (TM 9-2320-364-10)
2500 lbs/1134 kg)
Outriggers down with weight off
Materials/Parts
vehicle suspension, (TM 9-2320-364-10)
Oil, Hydraulic (Item 34, Appendix B)
Tags, Identification (Item 72, Appendix B)
Lockwasher (4) (Item 282, Appendix E)
Preformed Packing (3) (Item 335, Appendix E)
Preformed Packing (6) (Item 336, Appendix E)
Preformed Packing (8) (Item 389, Appendix E)
Wooden Block (Appendix C)
Wooden Block (Appendix C)
START
1.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Unit Troubleshooting
Flowmeter test.
on Page 2-615
tasks completed.
Hoist operates.
REASON FOR QUESTION
Are 4 gpm (15 lpm) or more
POSSIBLE PROBLEMS
If BOOM valve and orifice on
measured from BOOM valve
four valve bank is faulty, flow to
with valve isolated from boom
Four valve bank faulty.
boom lift cylinders will be
Lift cylinder faulty.
restricted.
lift cylinders?
Go to Step 4 of this
NO
Fault.
YES
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