TM 5-4310-387-14
5-23. Second Stage Valve Head Assembly.
This task covers:
a.
Replace
b.
Repair
INITIAL SETUP
Tools
General Mechanic's Tools Kit (NSN 5180-00-177-7033)
Torque Wrench (NSN 5120-00-247-2540)
TSP Ultrasonic Cleaner (NSN 4940-00-164-8997)
Materials/Parts
Preformed Packing
Second Stage Valve Head Assembly
Cloth, Lint Free (Item 7, Appendix E)
Bands, Rubber (Item 4, Appendix E)
Tape, Teflon (Item 23, Appendix E)
Bags, Plastic (Item 3, Appendix E)
Tape, Pressure Sensitive (Item 22, Appendix E)
Equipment Condition
Compressor unit shutdown and depressurized
(para. 2-12).
References
Cleaning Procedures, Chapter 4, Section VI.
Appendix F Torque Values.
a. Replace. (figure 5-31)
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)
Loosen connector nut (1).
(2)
Loosen connector nut (2).
(3)
Remove safety valve (3) and preformed packing (4). Discard preformed packing (4).
(4)
Remove six bolts (5), washers (6), second stage valve assembly (7), and preformed packing (8). Discard
preformed packing (8).
(5)
Remove two elbows (9).
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