TM 5-4310-386-14
6-7. 1st Stage Cylinder and Piston (Cont).
(1)
Lift cylinder (1) and gasket (2) off upper crankcase (3) and piston (4).
(2)
Remove four studs (5) from crankcase (3).
(3)
Turn crankshaft until piston (4) can be seen.
(4)
Using circlip pliers, remove two snap rings (6) securing piston pin (7).
(5)
Remove piston pin (7) from piston (4) and connecting rod (8).
(6)
Remove piston (4).
(7)
Position piston (4) over connecting rod (8) and install piston pin (7).
(8)
Using circlip pliers, install two snap rings (6).
(9)
Install four studs (5) on crankcase (3).
(10)
Install gasket (2) on crankcase (3).
(11)
Apply lubricating oil to cylinder walls.
(12)
Position cylinder (1) on piston (4) using ring clamps.
(13)
Slide cylinder down until it seats on gasket (2) on crankcase (3).
b. Repair. (figure 6-2)
(1)
Remove 1st 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 three rings (1) from piston.
(3)
Clean cylinder (3) and piston (2) in accordance with Chapter 4, Section VII.
6-8
