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2-3 WARNING TM  9-2815-237-34 Section  IV.  GENERAL  MAINTENANCE  INSTRUCTIONS 2-8.  GENERAL  MAINTENANCE  INSTRUCTIONS  TASK  SUMMARY TASK PARA, PROCEDURES PAGE NO. 2-9. Cleaning 2-3 2-10. Inspection 2-4 2-11. Repair 2-5 2-12. Assembly 2-6 2-9.   CLEANING a. General Instructions. Cleaning procedures will be the same for the majority of parts and compo- nents which make up engine subassemblies. General cleaning procedures are detailed in “b” through “i”. b. The Importance of Cleaning. Great care and effort are required in all cleaning operations. The presence of dirt and foreign material is a constant threat to satisfactory engine operation and maintenance. The following will apply to all cleaning operations: (1) Hands must be kept free of any accumulation of grease which can collect dust and grit. (2) Clean all parts before inspection, after repair, and before assembly. (3) After cleaning, all parts must be covered or wrapped in plastic or paper to protect them from dust and/or  dirt. WARNING Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only with effective chip guarding and personal protective   equipment   (goggles/shield,   gloves,   etc.). c.  External  Engine  Cleaning.  All electrical equipment and other parts that could be damaged by steam cleaning  or  moisture  must  be  removed,  and  all  openings  covered  before  cleaning.  Dry  with  compressed  air. d. Disassembled Parts Cleaning. Place all disassembled parts in wire baskets for cleaning. (1) Dry and cover all cleaned parts. (2) Place on or in “racks” and hold for inspection or repair. (3) All parts subject to rusting must be lightly oiled and wrapped. (4) Keep all related parts and components together. Do not mix parts. Improper cleaning methods and use of unauthorized cleaning solutions will injure personnel and damage equipment. See TM  9-247  for  correct  information. e.  Castings. (1) Clean inner and outer surfaces of castings and all areas subject to grease and oil with cleaning solvents.  Refer  to  TM  9-247. (2) Use  a  stiff  brush  to  remove  sludge  and  gum  deposits. (3) Use  compressed  air  to  blow  out  all  tapped  capscrew  holes  and  dry  castings  after  cleaning.


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