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TM 9-2320-364-20-3
2-2772
18. SWING AND TELESCOPE DO NOT OPERATE OR OPERATE SLOWLY.
INITIAL SETUP
1.
Notify DS
Maintenance.
START
NO
Outriggers operate.
Hoist and boom lift 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 tele/swing
manifold and will receive load
sense pressure from four valve
bank lift/hoist manifold.
2-29. CRANE TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
Personnel Required
Two
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 swing and
boom telescope with the
BOOM control lever held in
the UP position?
Four valve bank
is faulty.
Notify DS
Maintenance.
YES
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