TM 5-4310-386-146-10. 4th Stage Cylinder and Piston (Cont).(5) Using circlip pliers, remove two circlips (8) and push guide piston pin (7) out of guide piston (9) andconnecting rod (10).(6)Remove guide piston (9).(7)Remove four studs (11).(8)Install four studs (11).(9)Install guide piston (9) on connecting rod (10).(10)Install guide piston pin (7) through guide piston (9) and connecting rod (10).(11)Using circlip pliers, install two circlips (8).(12)Position preformed packing (6) on upper crankcase (4).(13)Install piston and sleeve assembly (5) into cylinder (3).(14)Install piston and sleeve assembly (5) onto to guide piston (9).(15)Position cylinder (3) down until it seats on preformed packing (6) and crankcase (4).(16)Install four washers (2) and nuts (1).b. Repair. (figure 6-8)(1) Remove 4th stage cylinder and piston (para. a. above).WARNINGCleanliness is imperative in maintaining and handling diving system components. All tools andparts must be kept free of oil, grease, rust, or other contamination in accordance with Chapter 4,Section VII of this manual. Foreign substances within an assembly could result in equipmentfailure 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 systemto become contaminated and could result in injury or death to the diver.(2) Remove piston (1) from sleeve (2).(3) Clean cylinder (3) and piston (1) and sleeve (2) in accordance with Chapter 4, Section VII.(4) Inspect cylinder (3) walls for cracks, scoring or damage. Replace if cracked, scoredor damaged.6-24
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