TM 9-2320-366-34-1
2-1098
KNOWN INFO
POSSIBLE PROBLEMS
1.
YES
NO
START
REASON FOR QUESTION
Replace cross relief valve (para 16-24) and/or
hydraulic orbit motor (para 16-25).
TEST OPTIONS
Four Way Control Valve
Assembly Flow Test
Repair four way control valve assembly
(para 16-28).
WARNING
Read WARNING
on following page.
l6. M1084/M1086 MATERIAL HANDLING CRANE (MHC) BOOM SWING ASSEMBLY DOES NOT WORK
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 four way control
valve.
Faulty orbit motor.
Faulty cross relief valve.
Faulty four way control
valve will cause boom
to not swing.
Is flow low and
pressure high through
four way control valve?
Materials/Parts
Rag, Wiping (Item 60, Appendix C)
Hose (2) (Item 40, Appendix C)
Fitting (2) (Item 31, Appendix C)
Adapter, Swivel (Item 3, Appendix C)
Adapter, Pipe (Item 2, Appendix C)
Adapter, Pipe (Item 1, Appendix C)
Reducer, Tube (Item 61, Appendix C)
