SECTION VI. REPAIR SECTION 6-1. REPAIR.        The    following    paragraphs    contain maintenance instructions for the Type I (Air) and Type II (Air/Oxygen)    Servicing    Units    These    Instructions    will enable    maintenance    personnel    to    repair    or    replace defective  parts,  allowing  the  servicing  unit  to  meet  new equipment     standards     of     operation     Instructions     are included for the disassembly, cleaning, inspection, repair or replacement, assembly of detailed parts into subassemblies,    subassemblies    into    assemblies,    and final    assembly    of    assemblies    to    form    a    complete servicing unit NOTE After   performing   any   repair   upon   the   air compressor  unit,  refer  to  TEST  (Section  V) and    test    service    units    to    ensure    proper operation 6-2. PRELIMINARY  PROCEDURES    In  general  it  is not  necessary  to  completely  disassemble  the  servicing units  as  illustrated  In  Figure  7-1.    Operational  checkout and  troubleshooting  will  indicate  the  required  degree  of disassembly   necessary   and   assemblies   which   require repair or replacement.  Prior to complete disassembly of the  servicing  unit,  the  following  step-by-step  procedures shall be completed as follows. a. On   work   station,   set   servicing   unit   hand brakes and position, set and pin stabilizing jack. Never  attempt   to   disassemble   any   part   of the service units without first having relieved all air or oxygen pressure from the system. b. Open gas cylinder valves, cam-lever valves, shut-off valves and bleed valve. 6-3. SERVICING  UNIT,  TYPE  I  (AIR)  AND  TYPE  II (AIR/OXYGEN).        The    following    paragraphs    contain disassembly, cleaning, inspection, repair or replacement, and  assembly  instructions  for  the  air   compressor   unit General  shop  practice  standards  for  maintenance  and overhaul   shall   be   followed   on   all   assemblies   General cleaning,   inspection,   and   repair   or   replacement   is   as follow : Provide    adequate    ventilation    when    using cleaning  solvent  (Federal  Specification  P-D- 680,  Type  II)  Avoid  prolonged  breathing  of vapors and minimize skin contact. Solvents conforming to Federal Specification P-D-680,  Type  II  shall  not  be  used  to  clean any  parts  of  the  trap  mounting  group  other than  those  specified  herein  These  solvents may     cause     damage     to     paint     coatings, plastics,   and   rubber   Disposal   of   solvents conforming    to    Federal    Specification    P-D- 680,    Type    II    shall    be    accomplished    in accordance  with  local  state  water  pollution control  laws  Consult  local  bioenvironmental engineer for guidance In no instance should these   solvents   be   allowed   to   contaminate streams  or  lakes  They  may  be  disposed  of by evaporation or burning under supervision NOTE Do   not   allow   parts   to   remain   in   cleaning solvent  for  extended  periods  of  time  or  rust spots    may    form    If    parts    are    not    to    be inspected    immediately    after    cleaning,    dip them  in  engine  oil  per  Military  Specification MIL-L- 2104C or equivalent Do not immerse electrical parts in cleaning solvent. a. Cleaning (1) Clean    all    unpainted    metal    parts    using cleaning  solvent  that  is  in  accordance  with Federal Specification P-D-680, Type  II1,  or equivalent   Wipe   nonmetallic   parts   with   a clean, lint-free cloth moistened in detergent and water and air dry. (2) Clean all painted surfaces by spraying  with hot     water     and     detergent     solution     per Federal  Specification  P-D-220.    Parts  that will    be    repainted    may    be    cleaned    with steam     After     cleaning,     refinish     affected painted areas where required 6-1