TM 9-2815-225-34&P 3-6. CLEANING (Contd) d. Disassembled Parts Cleaning.  Place all disassembled parts in suitable wire baskets for cleaning. (1) Dry and cover all cleaned parts. (2) Place cleaned parts in containers or holding racks for inspection or repair. (3) All parts subject to oxidation and rust must be lightly oiled and wrapped. (4) Keep all related parts and components together.  Do not mix parts. WARNING Improper  cleaning  methods  and  use  of  unauthorized  cleaning  solvents  will  not  be  used. Refer to TM 9-247 for proper cleaning methods and solvents.  Failure to comply may result in damage to equipment or injury to personnel. 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. WARNING Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa).  Use only with effective  chip  guarding  and  protective  equipment  such  as  goggles  or  shield,  gloves,  etc. Failure to comply may result in injury to personnel. (3) Use compressed air to blow out all tapped screw holes and to dry castings after cleaning. f. Oil Passages.  Particular attention must be given to all oil passages in castings and machined parts.  All oil passages must be clean and free of any obstructions. (1) Clean oil passages with wire brush probes to break up any sludge or gum deposits. (2) Wash passages by flushing with solvent.  See TM 9-247. (3) Dry passages with compressed air. CAUTION Do  not  allow  cleaning  solvents  to  come  in  contact  with  seals,  cables,  or  flexible  hoses. Solvents can cause leather, rubber, and some synthetic materials to dry out, rot, and lose pliability, making them unserviceable. g. Oil Seals, Electrical Cables, and Flexible Hoses.  Clean with soap and water. h. Ball-Roller Bearings. (1) Bearings require special cleaning.  After removing surface oil and gum deposits, place bearing in hot oil, 140°F (60°C), to loosen congealed oil and grease.  Wipe bearings dry (do not use compressed air).  After cleaning, coat bearings with oil, wrap in paper, and hold for inspection. (2) See TM 9-214 for information about care of bearings. 3-7. INSPECTION a. General Instructions.  Inspection procedures will be the same for many of the engine parts and components that make up the engine subassemblies.  Follow the general procedures for inspection detailed in steps b. through h.  Dimensional standards for various parts  have  been  fixed  at  extremely  close  tolerances:    use  the  repair  standards  specification  tables  in  Appendix  F.    Use  specified inspection equipment for inspection where cracks or other damage cannot be otherwise found.  Exercise extreme care in all phases of inspection. 3-4