Do   not   use   steam   or   water   to   clean   any electrical   components   or   assemblies   such as electrical gauges, switches and solenoids (3) Clean  electrical  components  with  trichloro- ethane,  per  Federal  Specification  O-T-620 or equivalent. Proper   precautions   must   be   exercised   to protect  personnel.    Stand  clear  of  all  tubing openings.    After  cleaning,  drain  tubes,  and dry  with  low  pressure  compressed  air   (30 psig maximum [206 kPa]). (4) Clean  outside  and  inside  surfaces  of  the steel    tubing    and    hose    assemblies    with compressed air,  pressurized  hot  water  and detergent or steam b. Inspection.  In general, inspect as follows (1) Inspect for visible wear, damage, distortion, cracks, breaks, and corrosion.  Replace all o-rings, gaskets and seals. (2) Inspect  threaded  parts  and  hardware  for stripped   threads,   cross-threading   and   for nicks and burrs. (3) Inspect  flex  hoses  and  tubing  for  evidence of leaks, cracks, pinching, chaffing conditions,  damaged  connecting  nuts,  and similar defects (4) Inspect painted surfaces for chipping, peeling or discolored paint. c. Repair   or   Replacement.      For   the   most   part, repair of this equipment will be made by replacement of worn or damaged parts. Detailed repair and replacement  procedures  for  specific  parts  are  found  in the following subassembly paragraphs. (1) Minor  nicks,  scoring  or  scratches  on  non- critical   surfaces   may   be   smoothed   with crocus  cloth  per  Federal  Specification  PC- 458 (2) Repair   or   replace   damaged   or   defective steel tubing.  To repair or replace steel tube assemblies  attachment  fittings,  proceed  as follows: NOTE Before  attempting  to  repair  tube  fittings,  make  certain stainless  steel  tubing  is  of  sufficient  length  to  fit  after cutting  off  end  containing  damaged  fittings  If  not  long enough, replace while tube assembly. (a) Cut  off  tubing  just  beyond  damaged fitting (b) Slide  tubing  nut  and  then  the  sleeve onto the tubing, refer to Figure 6-1.  Make certain end of tubing is free of any burrs and is reasonably square. (c) Insert the end of the tubing into mating fitting,  see  Figure  6-2.    Make  certain  that  tubing  end  is bottomed   on   fitting   shoulder   Apply   a   good   grade   of lubricant on end of tubing. (d) Turn   tubing   nut   slowly   with   wrench while  turning  tubing  with  other  hand.    When  the  sleeve grips the tubing, that Is when the tubing can no longer be turned  by  hand,  stop  turning  nut  and  note  position  of wrench.  This is termed the nng grip point (e) Then, tighten the nut an additional one turn past the ring gnp point. (f) Unscrew  nut  and  remove  the  tubing from   the   mating   fitting,   or   presetting   tool   Inspect   the preset as described in Figure 6-1. (g) When installing a preset tubing assembly,  lubricate  the  threads  and  seat  of  the  fitting and  the  shoulder  of  the  sleeve  with  a  small  amount  of good grade lubricant such as clean compressor oil. At  installation  of  tubing  assembles,  do  not overtighten tubing nuts. (h) Insert  tubing  assembly  into  fitting  and tighten  nut  until  a  sharp  use  in  torque  is  felt  Starting  at position    of    sharp    torque    rise,    tighten    the    nut    1/4 additional turn to complete the assembly. 6-2