TM 5-4310-386-14
6-10. 4th Stage Cylinder and Piston.
This task covers:
a.
Replace
b.
Repair
INITIAL SETUP
Tools
Materials/Parts (Cont)
General Mechanic's Tool Kit
Detergent, Nonionic (Item 8, Appendix E)
(NSN 5180-00-177-7033)
Water, Distilled (Item 9, Appendix E)
Caliper Set, Micrometer (NSN 5210-00-554-7134)
Lubricating Oil (Item 15, Appendix E)
Circlip Pliers (NSN 5120-00-789-0492)
Piston Ring Removal Tool (PN N4453)
Equipment Condition
Materials/Parts
Compressor unit shutdown (para. 2-13).
4th stage compressor valve head assembly
Cylinder, Compressor
removed (para. 5-23).
Piston, 4th Stage
Gasket, Crankcase
References
Tape (Item 25, Appendix E)
Bands, Rubber (Item 4, Appendix E)
Refer to Appendix F for torque values.
Bags, Plastic (Item 3, Appendix E)
Cleaning Procedures, Chapter 4, Section VII.
a. Replace. (figure 6-7)
WARNING
Cleanliness is imperative in maintaining and handling diving air 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.
(1)
Remove four nuts (1) and washers (2) securing cylinder (3) to upper crankcase (4).
(2)
Lift cylinder (3), piston and sleeve assembly (5) and preformed packing (6) from upper crankcase (4).
(3)
Remove piston and sleeve assembly (5) from cylinder (3).
(4)
Turn crankshaft until guide piston pin (7) can be seen.
6-22
