TM 5-4310-386-14
6-8. 2nd Stage Cylinder and Piston (Cont).
(5)
Using circlip pliers, remove two snap rings (8).
(6)
Remove piston pin (9) from piston (7) and connecting rod (10).
(7)
Remove piston (7).
(8)
Position piston (7) over connecting rod (10) and install piston pin (9).
(9)
Using circlip pliers, install two snap rings (8).
(10) Install four studs (6) on crankcase (4).
(11) Install gasket (5) on crankcase (4).
(12) Apply lubricating oil to cylinder walls.
(13) Position cylinder (3) on piston (7) using piston ring clamp.
(14) Slide cylinder (3) down until it seats on gasket (5) on upper crankcase (4).
(15) Install four washers (2) and nuts (1).
b. Repair. (figure 6-4)
(1)
Remove 2nd stage cylinder and piston (para. a. above).
WARNING
Cleanliness is imperative in maintaining and handling diving system components. All tools and
parts 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 equipment
failure and possible injury or death to personnel.
Ensure that all air lines and components removed or openings into the air system that provides
breathing air are covered with a plastic bag and secured with a rubber band or taped shut. Small
components should be stored in a plastic bag and sealed. Failure to do so will cause air system
to become contaminated and could result in injury or death to the diver.
(2)
Remove four rings (1) from piston (2) using piston ring removal tool.
(3)
Clean cylinder (3) and piston (2) in accordance with Chapter 4, Section VII.
(4)
Inspect cylinder walls for cracks, scoring or damage. Replace if cracked, scored or damaged.
(5)
Inspect piston rings (1) for cracks, or excessive wear. Replace if cracked or worn excessively.
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