TM 5-4220-231-14&P (6) Lubricate     O-ring    (20),    M83248/2-111, with     silicone compound (Item 9, Appendix D),    and     install    on    elbow (17). Position    and    tighten    tube    (18) 18 to  elbow (17)    by  tightening union    nut (19)   clockwise. 17 20 (7) Perform step b    of Para. 4-3 and 19 replace HP filter on regulator housing. (8) Install   teflon bushing (5)  on    housing, and    install    neoprene sleeves (6)   on regulator from   front   of  panel. (9) Install handle (4)    on    regulator with hex-head screws (3) in   center of handle. Install   center spacer (2)   on handle with   hex-head screw (1). 6 3 4 (10)  Apply    pressure to   DACC. Leak-test 5 with  nonionic detergent solution (NID) 2 GP   (Item    17,   Appendix D). Correct 1 leaks    as    necessary. (11)    Reinstall and   secure the   DACC    panel in   the DACC case with    all   securing screws. Replace and secure case front    cover over DACC    panel. (12) Complete Reentry Control Report X L@@' 3 @4 2 5 and    Log. 4-10