TM 10-3930-664-10 I. When  you  do  your  PMCS,  you  will  always  need  a  rag  or  two.    Following  are  checks  that  are  common  to  the entire 4KRTFL: WARNING · Dry cleaning solvent P-D-680 is toxic and flammable.  Wear protective goggles and gloves and use only in well ventilated area.  Avoid contact with skin, eyes and clothes and don’t breathe vapors.  Do not use near open flame or excessive heat.  The flash point is 1000 F - 138° F (38° C - ^50° C).  If you become dizzy while using cleaning solvent, get fresh air immediately and get medical aid.  If contact with eyes is made, wash your eyes with water and get medical aid immediately.  Cleaning solvents evaporate quickly and  can  irritate  exposed  skin  if  solvents  contact  skin.    In  cold  weather,  contact  of  exposed  skin  with cleaning solvents can cause frostbite. · DO NOT use diesel fuel, gasoline, or benzene (benzol) for cleaning. CAUTION · Keep  cleaning  solvents,  gasoline,  and  lubricants  away  from  rubber  or  soft  plastic  parts.    They  will deteriorate material. · When  cleaning  the  4KRTFL  with  high  pressure  water,  do  not  use  direct  pressure  washing  for  the backup alarm.  Immersing the backup alarm in high pressure water can cause the alarm to fail. (1)   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) on all metal surfaces.  Use soap and water when you clean rubber or plastic material.  Upholstery can be cleaned with soap and water and a clean, damp cloth. (2)   Rust and Corrosion.  Check 4RTFL body and mast for rust and corrosion.  If any bare metal or  corrosion exists, clean, and apply a thin coat of oil.  Report it to your supervisor. (3)   Bolts, Nuts, and Screws.  Check them all for obvious looseness, missing, bent, or broken condition.   Look for chipped paint, bare metal, or rust around bolt heads.  If you find a loose bolt, nut, or screw, report it to your supervisor. (4) Welds.  Look for loose or chipped paint, rust, or gaps where  parts  are  welded  together.    If  you  find  a  bad weld, report it to your supervisor. (5)   Electric  Wires  and  Connectors.    Look  for  cracked,  frayed,  or  broken  insulation,  bare  wires,  and  loose  or broken connectors.  Report any damaged wires to your supervisor. (6)   Hoses and Fluid Lines.  Look for wear, damage, leaks, and 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 a leak comes from a loose fitting or connector, or if something is broken or worn out, report it to your supervisor. j. When you check for "operating condition," you look at the component to see if it’s serviceable. 2-7. LEAKAGE DEFINITIONS FOR OPERATOR PMCS It is necessary for you to know how fluid leakage affects the status of the 4KRTFL.  Following are types/classes of leakage an  operator  needs  to  know  to  be  able  to  determine  the  status  of  the  4KRTFL.    Learn  these  leakage  definitions  and remember - when in doubt, notify your supervisor. 2-16