TM 9-2320-366-34-1
2-1090
KNOWN INFO
POSSIBLE PROBLEMS
1.
YES
Are flow and pressure
through control valve OK?
NO
START
TEST OPTIONS
REASON FOR QUESTION
Faulty control valve will
cause mast to not erect
or stow.
Repair three way control valve assembly
(para 16-27).
Three Way Control Valve
Assembly Flow Test
WARNING
Read WARNING
on following page.
l4. M1084/1086 MATERIAL HANDLING CRANE (MHC) MAST DOES NOT ERECT OR STOW
INITIAL SETUP
Equipment Conditions
Engine shut down (TM 9-2320-366-10-1).
Personnel Required
(2)
Tools and Special Tools
Tool Kit, Genl Mech (Item 78, Appendix B)
Tester, Hydraulic (Item 73, Appendix B)
Pan, Drain (Item 43, Appendix B)
Goggles, Industrial (Item 28, Appendix B)
Hydraulic oil level OK.
Hydraulic hoses, tubes,
and fittings OK.
Faulty control valve.
Faulty holding valve.
Faulty thermal relief valve.
Faulty erection cylinder.
Materials/Parts
Rag, Wiping (Item 60, Appendix C)
Hose (2) (Item 40, Appendix C)
Fitting (2) (Item 31, Appendix C)
Fitting (Item 32, Appendix C)
Adapter, Swivel (Item 3, Appendix C)
Reducer, Tube (Item 61, Appendix C)
Adapter, Pipe (Item 1, Appendix C)
Adapter, Pipe (Item 2, Appendix C)
