TM 10-3930-653-14&P 8.  While performing PMCS, observe WARNINGS and CAUTIONS preceding those operations which could endanger your safety or result in damage to the equipment. WARNING Dry  cleaning  solvent,  P-D-680,  is  toxic  and  flammable.    Wear  protective  goggles  and  gloves  and use only in a well-ventilated area.  Avoid allowing solvent to contact skin, eyes, and clothes, and do not breathe vapors.  Do not use near open flame or excessive heat.  If you become dizzy while using cleaning solvent, get fresh air and medical aid immediately.  If solvent comes in contact with skin  or  clothing,  wash  with  water.    If  solvent  gets  in  your  eyes,  flush  eyes  with  water  and  get medical aid immediately.  Flash point of solvent is 138°F (59°C). a. Keep it clean.  Dirt, grease, oil and debris only get in the way and may cover up a serious problem.  Clean as you work and as needed.  Use dry cleaning solvent (P-D-680) to clean metal surfaces.  Use soap and water when you clean rubber or plastic material. b. Bolts, nuts and screws.  Check that they are not loose, missing, bent or broken.  You can’t try them all with a tool, but look for chipped paint, bare metal or rust around bolt heads.  Tighten any bolt, nut, or screw that you find loose. c. Welds.  Look for loose  or  chipped  paint,  rust  or  gaps  where  parts  are  welded  together.    If  you  find  a  bad  weld, report it to organizational maintenance. d. Electric wires and connectors.  Look for cracked or broken insulation, bare wires and loose or broken connectors. Report damaged or loose wiring to organizational maintenance. e. Hoses  and  fluid  lines.    Look  for  wear,  damage  and  leaks.    Make  sure  clamps  and  fittings  are  tight.    Wet  spots show  leaks  but  a  stain  around  a  fitting  or  connector  can  also  mean  a  leak.    If  leakage  comes  from  a  loose  fitting  or connector, tighten the fitting or connector.  If something is broken or worn out, report it to organizational maintenance. f. Vehicle must be on level ground in order to get correct fluid level measurement. 9.  It is necessary for you to know how fluid leaks affect the status of your equipment.  The following are definitions of the types/classes of leakage you need to know to be able to determine the status of your equipment.  Learn and be familiar with them and REMEMBER when in doubt, notify your supervisor. B-32