TM 9-2320-366-34-1
KNOWN INFO
TEST OPTIONS
1.
START
NO
YES
Hydraulic oil level OK.
PTO OK.
Hydraulic hoses, tubes
and fittings OK.
Hydraulic pump OK.
Monoblock valve OK.
Boom up lockout OK.
Boom down lockout OK.
Overload shutdown
system OK.
POSSIBLE PROBLEMS
Faulty control valve.
Faulty holding relief valve.
Faulty boom lift cylinder.
Is flow and pressure
through boom lift
control valve OK?
Control Valve Flow Test
REASON FOR QUESTION
Faulty boom control
valve will cause boom
to not lift up or down.
WARNING
Read WARNING
on following page.
Replace eight bank valve
assembly (para 16-59).
j6. M1089 MATERIAL HANDLING CRANE (MHC) BOOM DOES NOT LIFT UP OR DOWN
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)
Materials/Parts
Rag, Wiping (Item 60, Appendix C)
Hose (2) (Item 40, Appendix C)
Fitting (2) (Item 31, Appendix C)
Reducer, Tube (Item 61, Appendix C)
Adapter, Swivel (Item 3, Appendix C)
Adapter, Pipe (Item 2, Appendix C)
Fitting (Item 32, Appendix C)
Adapter, Pipe (Item 1, Appendix C)
2-1050
