18. SWING AND TELESCOPE DO NOT OPERATE OR OPERATE SLOWLY.
Hoist and boom lift operate.
Four valve bank faulty.
REASON FOR QUESTION
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 Mechanics: Automotive
(Item 74, Appendix G)
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)
Does crane swing and
boom telescope with the
BOOM control lever held in
the UP position?
Four valve bank