TM 5-4310-386-14
6-9. 3rd Stage Cylinder and Piston (Cont).
(3)
Remove piston (6) from cylinder (3).
(4)
Turn crankshaft until piston pin (7) can be seen.
(5)
Using circlip pliers, remove two circlips (8) and push piston pin (7) out of guide piston (9) and connecting
rod
(10).
(6)
Remove four studs (11) from crankcase (4).
(7)
Install four studs (11) on crankcase (4).
(8)
Position guide piston (9) over connecting rod (10) and insert piston pin (7).
(9)
Using circlip pliers, install two circlips (8).
(10) Position preformed packing (5) on crankcase (4).
(11) Lubricate cylinder wall with oil.
(12) Insert cylinder (3) down over floating piston (6) using piston ring clamp.
(13) Insert cylinder (3) and floating piston (6) onto guide piston (9).
(14) Position cylinder (3) down until it seats on preformed packing (5) on upper crankcase (4).
(15) Install four washers (2) and nuts (1).
b. Repair. (figure 6-6)
(1)
Remove 3rd 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)
Using piston ring removal tool, remove four rings (1) from piston (2).
(3)
Clean cylinder (3) and piston (2) in accordance with Chapter 4, Section VII.
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