TM 10-3930-671-24 b.    Whenever  possible,  replace  all  gaskets,  packings,  and  seals  removed  during  repair  work.    Similarly,  all lockwire, lockwashers, cotter pins, and like items should be replaced during assembly. c.  To avoid scratching the sealing surfaces, do not use a metal tool when removing gaskets, packings, or seals. Use a pointed wooden dowel to remove packing from grooves.  Use wooden or plastic scrapers on gasket surfaces. d.  Before disassembly of any component, study the exploded-view illustration found in either the vendor manuals, parts catalog, or this repair manual.  Pay particular attention to the relationship of internal parts.  Being familiar with the construction will speed up disassembly and help avoid improper assembly. e.    To  prevent  moisture  and  foreign  matter  from  entering   open   housings,   lines,   and   other   openings,   apply protective covers after disassembly.  Wrap all parts in clean paper or dip parts in preservation oil. f.    Remove  only  the  parts  requiring  repair  or  replacement.    Do  not  disassemble  a  component  any  further  than necessary. 5-4. GENERAL CLEANING INSTRUCTIONS. WARNING • Dry  cleaning  solvent  (P-D-680)  is  TOXIC  and  flammable.    Wear  protective  goggles  and gloves; use only in a well-ventilated area; avoid contact with skin, eyes, and clothes, and do not breathe vapors.  Keep away from heat or flame.  Never smoke when using solvent; the flash point for type I dry cleaning solvent is 100°F (380C) and for type II is 140°F (60°C). Failure to do so may result in injury or death to personnel. • If  personnel  become  dizzy  while  using  cleaning  solvent,  immediately  get  fresh  air  and medical help.  If solvent contacts skin or clothes, flush with cold water.  If solvent contacts eyes, immediately flush eyes with water and get immediate medical attention. • Never dip or soak electrical components, packings, rubber, plastic, or Teflon parts in dry cleaning   solvent.      Solvent   can   react   with   material   and   result   in   severe   damage   or destruction of parts. a.  Clean all metal parts with dry cleaning solvent.  Do not use gasoline for cleaning parts. b.  After soaking parts in solvent, wash away deposits by slushing or spraying, and where necessary, by brushing with a soft-bristle, nonmetallic brush moistened in solvent. WARNING Compressed air used for cleaning purposes must not exceed regulated 30 psi (207 kPa).  Use only with effective chip guarding and personal protective equipment (goggles/shield, gloves, etc.). c.  Use clean, lint-free cloth or filtered, compressed air to dry all metal parts except bearings.  Bearings must be allowed to air dry. 5-2