TM10-3930-660-20 WARNING Eye shields must be worn when cleaning with a wire brush. Flying rust and metal particles may cause injury  to  personnel. WARNING Particles  blown  by  compressed  air  are  hazardous.  Make certain the air stream is directed away from user and other personnel in the area. To prevent injury, user must wear protective goggles or face shield when using compressed  air. b. External Engine Cleaning. (1) (2) (3) (4) Protect all electrical equipment that could be damaged by the steam or moisture before steam cleaning. Cover all openings before steam cleaning. After cleaning, dry and apply a light coat of oil to all parts subject to rust. Blow out all tapped (threaded) holes with compressed air to remove dirt and cleaning fluids. c. Disassembled  Parts  Cleaning. (1) Place all disassembled parts in wire baskets for cleaning. (2) Dry and cover all cleaned parts. (3) Place parts on or in “racks”   and hold for inspection or repair. (4) All parts subject to rusting must be lightly oiled and wrapped. (5) Keep all related parts and components together. Do not mix parts. d. Castings. (1) Clean inner and outer surfaces of castings and all areas subject to grease and oil with cleaning solvents. Refer  to  TM9-247. (2) Use a stiff brush to remove sludge and gum deposits. (3) Blow out all tapped (threaded) holes with compressed air to remove dirt and cleaning fluids. e. Oil Passages. particular attention must be given to all oil passages in castings and machined parts. Oil passages must be clean and free of any obstructions. 3-3