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. 3-4. 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 (600C). 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, or 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.)  to prevent injury to personnel. c. Use  clean,  lint-free  cloth  or  filtered,  compressed  air  to  dry  all  metal  parts  except  bearings.    Bearings  must  be allowed to air dry. 3-2