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TM  9-2815-202-34 Section  Il. GENERAL   MAINTENANCE   PRACTICES 3-2.  CLEANING  AND  GENERAL  REPAIR  INSTRUCTIONS a.   Cleaning (1) General. Procedures for cleaning will be the same for a great percentage of parts and components. To avoid repetition of instructions, the general procedures for cleaning are detailed in paragraphs  2 through 5 below. See TM  9-247 for  additional  information pertaining  to  cleaning. (a)  Clean  all  parts  before  inspection,  after  repair,  and  before  assembly. (b) Hands should be kept free of grease which can collect dust and dirt. (c) After cleaning, all parts should be covered or wrapped in plastic to protect them from dust and dirt. (2)   Castings. (a) (b) Clean inner and outer surfaces of casting and all areas subject to oil and grease with cleaning  solvent. Remove sludge and gum deposits from castings with a stiff brush. WARNING Compressed  air  used  for  cleaning  purposes  will  not  exceed  30  PSI.  Use only  with  effective  chip  guarding  and  personal  protective  equipment (goggles/shield,  gloves,  etc.). (c) Use filtered compressed air to blow out and dry all tapped holes in castings. (3)  Oil  Passages. (a) Clean passages with wire or suitable probe to break up any sludge or gum deposits. 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  contact with  skin,  eyes,  and  clothes  and  don’t  breathe  vapors.  Do  not  use  near open  flames  or  excessive  heat.  The  flash  point  Is  100°F-138oF (38°C-50oC).  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. 3-2


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