TM 5-4220-227-14 Section III.  DIRECT SUPPORT MAINTENANCE PROCEDURES 5-6.  General.  This section contains direct support maintenance procedures as authorized by the maintenance allocation chart in Appendix B of this manual. Paragraph Page 5-7 Medical Lock (M/L) Outer Door Assembly ............................................................ 5-6 5-8 Medical Lock (M/L) Inner Door Assembly............................................................. 5-10 5-9 Pressure Relief Valve .......................................................................................... 5-14 5-10 Ball Valve 3/4 Inch (Pressure Relief Valve Assembly) ......................................... 5-16 5-11 Skid Assembly, Chamber..................................................................................... 5-20 5-12 Chamber Instrument Panel and Hood Assembly .................................................. 5-22 5-13 Heater/Chiller Unit (CCU-03) ............................................................................... 5-26 5-14 Heater/Chiller Unit, Motor .................................................................................... 5-30 5-15 Scrubber Assembly Motor.................................................................................... 5-32 5-16 Portable Oxygen Analyzer Battery ....................................................................... 5-34 5-17 Portable Oxygen Analyzer Probe Assembly......................................................... 5-36 5-18 Flow Meter........................................................................................................... 5-40 5-19 Double Light Power Supply (Inner Lock) .............................................................. 5-44 5-20 Light Source ........................................................................................................ 5-50 5-21 Single Light Power Supply (Outer Lock)............................................................... 5-54 5-22 Fluorescent Light ................................................................................................. 5-60 5-23 Wiring Harness .................................................................................................... 5-63 5-24 Front Panel Chassis Assembly ............................................................................ 5-70 5-25 Circuit Card ......................................................................................................... 5-80 5-26 Battery Sense Card Assembly ............................................................................. 5-82 5-27 Battery Card and Case ........................................................................................ 5-84 5-28 O₂ "K" Bottles/Manifold ........................................................................................ 5-92 5-29 Gage (O₂ "K" Bottles/Manifold) ............................................................................ 5-96 5-30 Oxygen Pressure Gages...................................................................................... 5-98 5-31 Pressure Regulator .............................................................................................. 5-102 5-32 Back Pressure Regulators.................................................................................... 5-106 5-33 Shutoff Valves (Oxygen)...................................................................................... 5-110 5-34 Isolator Valves..................................................................................................... 5-114 5-35 Dump Valves ....................................................................................................... 5-118 5-36 Oxygen BIBS Manifold ........................................................................................ 5-122 5-37 Inhalator Mask Assembly ..................................................................................... 5-124 5-38 Inhalator Mask Demand/Exhaust Regulators ....................................................... 5-126 5-39 Dual Hose Assembly ........................................................................................... 5-128 5-40 O₂ and Air Piping ................................................................................................. 5-132 5-41 Air Supply Manifold ............................................................................................. 5-140 5-42 Ball Valves 3/4 Inch (Air Supply Manifold) ........................................................... 5-144 5-43 Ball Valves 1 Inch (Air Supply Manifold) .............................................................. 5-150 5-44 Air Exhaust Manifold............................................................................................ 5-154 5-45 Ball Valves 1 1/4 Inch (Air Exhaust Manifold) ...................................................... 5-156 5-46 Depth Gages ....................................................................................................... 5-160 5-47 Caisson Gages .................................................................................................... 5-164 5-5