TM 5-4310-387-14
6-12. Third Stage Cylinder
This task covers:
Replace
INITIAL SETUP
Tools
General Mechanic's Tool Kit (NSN 5180-00-177-7033)
Materials/Parts
Gasket
Preformed Packing
Bands, Rubber (Item 4, Appendix E)
Bags, Plastic (Item 3, Appendix E)
Tape, Pressure Sensitive (Item 22, Appendix E)
Rags, Wiping (Item 19, Appendix E)
Lubricating Oil (Item 17, Appendix E)
Equipment Condition
Third stage valve head removed (para. 5-25)
Oil pressure regulator removed (para. 5-20)
References
Cleaning Procedures, Chapter 4, Section VI.
Appendix F Torque Values.
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 VI 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) and remove third stage cylinder (3), plunger (4), and preformed
packing (5). Discard preformed packing (5).
(2)
Remove third stage crosshead guide (6) and gasket (7). Discard gasket (7).
(3)
Ensure all gasket surfaces are clean and old gasket material removed.
(4)
Install new gasket (7) and crosshead guide (6).
(5)
Ensure all preformed packing seating surfaces are clean and free of all dirt and debris.
(6)
Install new preformed packing (5) in third stage cylinder (3).
(7)
Install third stage cylinder (3) and plunger (4) and secure with four nuts (1) and washers (2).
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