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Page Title:
BOOM DOES NOT RAISE OR RAISES SLOWLY. |
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 TM 9-2320-364-34-1
2-15. MATERIAL HANDLING CRANE TROUBLESHOOTING (CONT).
14. BOOM DOES NOT RAISE OR RAISES 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)
Wheels chocked, (TM 9-2320-364-10)
Materials/Parts
Outriggers down with weight off
Oil, Hydraulic (Item 34, Appendix B)
vehicle suspension, (TM 9-2320-364-10)
Tags, Identification (Item 72, Appendix B)
Lockwasher (4) (Item 282, Appendix E)
Packing, Preformed (3) (Item 335, Appendix E)
Packing, Preformed (6) (Item 336, Appendix E)
Packing, Preformed (2) (Item 363, Appendix E)
Packing, Preformed (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 2-591
tasks completed.
Boom lowers.
REASON FOR QUESTION
Are 6 gpm (23 lpm) or more
POSSIBLE PROBLEMS
If BOOM valve on four valve
measured from BOOM valve
bank is faulty, flow to boom lift
Four valve bank faulty.
cylinders will be restricted.
with valve isolated from boom
Lift cylinder faulty.
lift cylinders?
Go to Step 4 of this
NO
Fault.
YES
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