TM 5-4310-379-145-31. Compressor Pistons, Connecting Rods, and BearingsThis task covers: a.Replaceb.RepairINITIAL SETUP:ToolsMaterials/Parts (Cont)General Mechanic's Tool Kit (NSN 5180-00-177-7033)Detergent, Nonionic (Item 10, Appendix D)Caliper Set, Micrometer (NSN 5210-00-554-7134)Connecting Rod, Low PressureCir-Clip Pliers (NSN 5120-00-789-0492)Connecting Rod, High PressureRing Compressor (NSN 5120-00-223-8848)Gasket, CylinderTorque Wrench (NSN 5120-00-554-7292)Tape (Item 24, Appendix D)TSP Ultrasonic Cleaner W/Heater (Item 35,Bands, Rubber (Item 5, Appendix D)Appendix B)Bags, Plastic (Item 4, Appendix D)Water, Distilled (Item 11, Appendix D)Materials/PartsEquipment ConditionPiston, Low PressurePiston, High PressureCylinder head removed (para.5-29).a.Removal. (figure 5-45)WARNINGCleanliness is imperative in maintaining and handling diving air system components. All toolsand parts must be kept free of oil, grease, rust, or other contamination in accordance withaccepted army diving cleaning procedures. Foreign substances within an assembly could resultin equipment failure and possible injury or death to personnel.Ensure that all air lines and components removed or openings into the air system that providesbreathing air are covered with a plastic bag and secured with a rubber band or taped shut. Smallcomponents should be stored in a plastic bag and sealed. Failure to do so will cause air system tobecome contaminated and could result in injury or death to the diver.NOTEThere are two pistons and connecting rods in each cylinder. Removal of each is the same.(1)Remove drain plug (1) and drain oil into suitable container.(2)Remove ten screws (2) securing handhole plate (3) on side, opposite the cylinder head being removed.(3)Remove and discard handhole plate gasket (4).(4)Turn pulley (5) as necessary to allow removal of connecting rod nuts (6), washers (7), and bolts (8).5-140
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