TM 9-2320-366-34-1 2-1094 KNOWN INFO POSSIBLE PROBLEMS 1. YES NO START TEST OPTIONS REASON FOR QUESTION Repair four way control valve assembly (para 16-28). Four Way Control Valve Assembly Flow Test WARNING Read WARNING on following page. l5.  M1084/M1086 MATERIAL HANDLING CRANE (MHC) HOIST 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)     STE/ICE-R (Item 70, Appendix B)     Goggles, Industrial (Item 28, Appendix B) Hydraulic oil level OK. Hydraulic hoses, tubes and fittings OK. Faulty four way control valve. Faulty hoist-up lockout valve. Faulty RV1 relief valve. Faulty holding valve. Faulty hoist. Faulty check valve. Is flow through four way control valve OK? Faulty four way control valve will cause hoist to not work. 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)   Reducer, Tube (Item 61, Appendix C)   Fitting (Item 32, Appendix C)   Adapter, Pipe (Item 2, Appendix C)   Adapter, Pipe (Item 1, Appendix C)