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Page Title:
HOIST DOES NOT OPERATE OR OPERATES SLOWLY. |
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 TM 9-2320-364-34-1
2-15. MATERIAL HANDLING CRANE TROUBLESHOOTING (CONT).
18. HOIST DOES NOT OPERATE OR OPERATES SLOWLY.
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)
References
Wrench, Torque (0-175 lb-ft)
TM 9-2320-364-10
(Item 277, Appendix F)
TM 9-2320-364-20
Lifting Device (Minimum Capacity
200 lbs/91 kg)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Materials/Parts
Parking brake applied, (TM 9-2320-364-10)
Oil, Hydraulic (Item 34, Appendix B)
Wheels chocked, (TM 9-2320-364-10)
Tags, Identification (Item 72, Appendix B)
Outriggers down with weight off
Gasket (Item 106, Appendix E)
vehicle suspension, (TM 9-2320-364-10)
START
1.
KNOWN INFO
TEST OPTIONS
Unit Troubleshooting
Does hoist operate with
Operation test.
tasks completed.
BOOM control lever in UP
Boom lift operates.
REASON FOR QUESTION
position?
If load sense check valve in four
POSSIBLE PROBLEMS
valve bank lift/hoist manifold is
Four valve bank faulty.
faulty, pump compensator will
Hoist motor faulty.
not receive load sense pressure
Hoist assembly faulty.
from HOIST valve. If BOOM
control lever is held in the UP
position while attempting to
hoist, pump compensator will
sense load sense pressure from
BOOM valve.
Go to Step 2 of this
NO
Fault.
YES
Repair four valve
bank (Para 16-26).
Verify repair, go to
Step 5 of this Fault.
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