TM5-4220-231-14&P 4-10   Console   Pressure    Gage  Isolation  Valve  (DACC). This task covers:    Replace INITIAL   SETUP Tools Equipment Conditions General Mechanics Tool    Kit Remove front   cover    from   DACC    case     (Para. 3-15    1-2) O-ring    Installation and    Removal Tool Remove rear    DACC    panel    (Para. 3-15 3) Materials/Parts References Valve,    Ball   13229E4597-6 Para. 4-2,    General O-ring, M83248/2-904 (1) O-ring, M83248/2-010 (2) Silicone Compound (Item   9,  Appendix D) Nonionic Detergent Solution (NID)   GP (Item    17,   Appendix D) a. Remove (1) Determine location of  the   console pressure gage isolation valve. Console Pressure Gage Isolation Valve (2) Remove tube (5)   from valve by positioning a   wrench on   union nut 5 (6).   Turn union nut   counterclock- wise. Remove, cut, and discard 6,7 O-ring    (7). 4 @  C n sole s roe   sure 4-30 Change 1