(3) Install   this   assembled   group   of   parts   in cylinder   cap   (7)   and   Install   retaining   ring (6).  Attach cover (3) to cap (7) with screw gaskets (5) and screws (4). (4) Install   cartridge   (15)   in   cylinder   (19)   and screw   tile   tipper   head   assembly   securely onto cylinder (19) hand tight. (5) The upper  and  lower  mounting  brackets  (2 and    1)    are    supplied    with    a    dehydrator assembly.  Attach the brackets (2 and 1) to cylinder   (19)   until   ready   for   next   higher assembly. 6-8. Priority  Valve  Assembly  (See Figure 8-5).  The following    paragraphs    contain    disassembly,    cleaning, inspection.          repair     or     replacement     and     assembly instructions for the priority valve. a. Disassembly.      Disassemble   the   priority   valve only   to   the   extent   necessary   to   repair   or   replace   a defective part or parts. (1) Unscrew  and  remove  jam  nut  (I)  and  set screw (2) from valve housing (3}. (2) Carefully  unscrew  and  remove  housing  (3) from valve body (12). (3) Remove  two  spring  buttons  (4),  spring  (5) and value plunger (6). (4) Remove backup ring (7) and o-ring (8) from plunger 16). (5) Remove   tubing   elbow   (9),   valve   washer (10) and valve seat ( I 1 ) from body (12). b. Cleaning.  Refer to paragraph 6-3.a.  for general cleaning requirements. (1) Clean    all    unpainted    metal    parts    using cleaning  solvent  that  is  in  accordance  with Federal  Specification  P-D-680,  Type  II   or equivalent. (2) Wipe    ion-metallic  parts  with  a  clean  lint- free    cloth    moistened    in    detergent    and water, and air dry. c. Inspection.        Refer    to    paragraph    6-3.b.        for general inspection requirements.  Visually inspect for: (1) Valve plunger for nicks and burrs that would cause sticking. (2) Back-up ring and o-rings for cuts, excessive wear, or deformation. d. Repair or Replacement.  Minor nicks, scoring, or scratches on non-critical surfaces may be smoothed with crocus cloth per Federal Specification P-C458.  Clean up minor thread damage to threaded parts. (1) Replace   all   threaded   parts   having   worn, stripped, or damaged threads. (2) Replace damaged or defective elbow. (3) Place new spring, plunger, backup ring.  o- ring,  washer,  and  seat  from  repair  kit,  in valve body. e. Assembly.        To    assemble    the    priority    valve assembly, proceed as follows: NOTE A  repair  kit  consisting  of  spring  (5),  plunger  (6), ring (7), o-ring (8), washer (10), and seat (I11) is available.    At  overhaul  of  the  priority  valve,  this kit shall be used. (1) Assemble valve seat (I 1) in valve body (12) and  tap  into  position  to  full  depth  of  bore. Install washer (10) in body (12). (2) Install   backup   ring   (7)   and   o-ring   (8)   in plunger  (6)  groove.    Assemble  plunger  (6) in     body     (12)     with     a     twisting     motion, assemble spring buttons (4) and spring (5). (3) Screw   housing   (3)   onto   body   (12)    until housing bottoms.  Install set screw (2)  and jam   nut   (1).   See   Figure   6-4   and   install elbow (9) and plug (13) in body (12). (4) Set   valve   to   open   at   2,200   psig   (15,158 kPa) by adjusting set screw(2); refer to AIR PURIFICATION/DEHYDRATOR GROUP, INSPECTION,  paragraph  6-5.c  and  Figure 6-3,   then   tighten   ,nut   (1)   to   secure   set screw at this setting. 6-9. Ten-Micron  Filter  Assembly.    (See  Figure  8-6.) The following paragraphs contain disassembly, cleaning, inspection, repair or replacement and assembly instructions for the ten-micron filter assembly. a. Disassembly.    Disassemble  the  ten-micron  filter assembly   only   to   the   extent   necessary   to   repair   or replace a defective part or parts. 6-8