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TM 9-2320-364-20-3
2-2770
17. LIFT AND HOIST DO NOT OPERATE OR OPERATE SLOWLY.
INITIAL SETUP
1.
Notify DS
Maintenance.
START
YES
NO
Outriggers operate.
Swing and telescope operate.
Four valve bank faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Operation test.
If check valve in four valve bank
center manifold is faulty, pump
compensator control will not
receive load sense pressure
from four valve bank lift/hoist
manifold and will receive load
sense pressure from four valve
bank tele/swing manifold.
2-29. CRANE TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
Equipment Condition
Engine Off, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
Outriggers down with weight off vehicle
suspension, (TM 9-2320-364-10)
Mast fully erected, (TM 9-2320-364-10)
References
TM 9-2320-364-10
Does crane hoist and
boom lift with the TELE
control handle held in the
IN position?
Four valve bank is
faulty. Notify DS
Maintenance.
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