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Page Title:
CRANE DOES NOT SWING OR SWINGS SLOWLY. |
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 TM 9-2320-364-34-1
2-15. MATERIAL HANDLING CRANE TROUBLESHOOTING (CONT).
8. CRANE DOES NOT SWING OR SWINGS SLOWLY.
INITIAL SETUP
Tools and Special Tools
Personnel Required
Tool Kit, General Mechanic's
Two
(Item 240, Appendix F)
References
Cap and Plug Set (Item 26, Appendix F)
TM 9-2320-364-10
Pan, Drain 4 gal (Item 144, Appendix F)
TM 9-2320-364-20
Pressure Test Kit (Item 165, Appendix F)
Equipment Condition
Materials/Parts
Engine OFF, (TM 9-2320-364-10)
Oil, Hydraulic (Item 34, Appendix B)
Parking brake applied, (TM 9-2320-364-10)
Tags, Identification (Item 72, Appendix B)
Wheels chocked, (TM 9-2320-364-10)
Lockwasher (2) (Item 269, Appendix E)
Outriggers down with weight off
Lockwasher (4) (Item 282, Appendix E)
vehicle suspension, (TM 9-2320-364-10)
Packing, Preformed (9) (Item 347, Appendix E)
Packing, Preformed (8) (Item 389, Appendix E)
START
1.
KNOWN INFO
TEST OPTIONS
Unit Troubleshooting
Operation test.
Does swing operate using
tasks completed.
SWING control lever with
Outriggers operate.
REASON FOR QUESTION
TELESCOPE control lever
Telescope operates.
held in the IN position?
If check valve in four valve bank
tele/swing manifold is faulty,
POSSIBLE PROBLEMS
pump compensator will not
receive load sense pressure
Four valve bank faulty.
from SWING valve. If TELE
Swing motor valve faulty.
control lever is held in the IN
Swing motor faulty.
position while attempting to
Swing brake faulty.
swing, pump control will sense
load sense pressure from
TELESCOPE valve.
Go to Step 2 of this
NO
Fault.
YES
Repair four valve
bank (Para 16-26).
Verify repair, go to
Step 8 of this Fault.
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