c. Repair  or  Replacement      Refer  to  paragraph  6- 3.c. for general repair or replacement procedures. (1) Replace     damage     or     defective     nipples, couplings and gauges. (2) Replace   all   threaded   parts   having   worn, stripped or damaged threads. (3) Replace   damaged   or   defective   tubing   or flex hoses. (4) Replace damaged or defective fittings. (5) Replace  identification  plates  If  damaged  or if markings are illegible. (6) Straighten    bent    or    dented    panel    (sheet metal). (7) Replace all parts that are worn or damaged to   an   extent   that   will   Impair   their   normal function. d. Cleaning (1) All parts or components of parts that make up   the   Type   II   Oxygen   System   shall   be oxygen leaned prior to their assembly. (2) Parts   shall   be   cleaned   and   handled   in   a contaminant free environment. e. Assembly.    To  assemble  the  Type  11,  Oxygen Section  of  the  control  panel,  proceed  as   follows   (see Figure 7-5). All components and parts of the oxygen system shall be oxygen clean, and shall be   assembled   in   a   clean   contamment free environment using approved oxygen clean assembly procedures. (1) Install manifold pressure gauge (24, Figure 7-5, Sheet 1 of 2) and secure to panel using gauge mounting screws and nuts. (2) Install the oxygen regulator pressure gauge (23)    and    secure    to    panel    using    gauge mounting screws and nuts. (3) Using     screws     (21)     attach     the     oxygen pressure regulator (22) to the panel,  place regulator handle  on  stem  and  secure  with  the  stem nut, install pop-off cap in the handle. NOTE Install   all   tubing   before   fully   tightening valves and manifolds. (4) Insert  the  rear  section  of  the  valves  (20) with  washers  (25)  through  the  back  of  the panel, insert the stem of the front section of the valve into the valve from the front of the panel  and  secure   valve   by   tightening   the retaining nut. (5) Install connectors (19, 22 and 27) in supply and  scuba  manifolds  (24,  28,  Figure  7-5, Sheet  2  of  2)  Install  the  connectors  as  per Figure   7-5   Sheet   2   of   2).      Install   safety valves   (21)   on   connectors   (22)   Position manifold mounts (20) on manifolds (24, 28). Using washers (19,  Figure  705,  Sheet  1  of 2) and screws (18) Install the manifolds on the control panel. (6) Install adapter (16, Figure 7-5, Sheet 1 of 2) to  the  oxygen  recharge  panel  mount  (23, Figure  7-5,  Sheet  2  of  2).    Using  screws (17,  Figure  7-5,  Sheet  1  of  2)  install  panel mount   to   the   panel.      Screw   cap   (15)   on adapter (16). (7) Install  cam  lever  valves  (14)  with  washers (18)   through   the   rear   of   the   panel   and secure  to  panel  using  the  valve  holddown nut (8) Using   gauge   mounting   screws   and   nuts, install oxygen cylinder pressure gauge (13). (9) Position   and   connect   scuba   manifold   to scuba manifold pressure gauge tube assembly   (11,   Figure   7-5,   Sheet   2   of   2) Position   and   connect   scuba   manifold   to charging valve tube assemblies (10). (10)   Position   and   connect   scuba   manifold   to bleed valve tube assembly (9). (11)   Position    and    connect    shut-off    valve    to scuba manifold tube assembly (8). (12)   Position  and  connect  pressure  regulator  to scuba manifold shut-off valve tube assembly (6). 6-12