TM 5-4220-225-14
4-21.
Air Supply Valve.
This task covers:
Replace
INITIAL SETUP
Tools
Materials/Parts
1-inch Box and Open End Wrench (Item 11,
Air Supply Valve
Appendix B)
Halocarbon Grease (Item 10, Appendix E)
1 1/4-inch Box and Open End Wrench (Item 13,
(Appendix B)
Equipment Condition
3/32-inch Hex Wrench (Item 19, Appendix B)
7/8-inch Box and Open End Wrench (Item 10,
Air supply tubing removed (para. 4-20).
Appendix B)
Reference
Para. 4-11 General
Replace. (figure 4-14)
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 accepted Army diving cleaning
procedures. 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 two setscrews (1) and remove handle (2).
(2)
Remove gland nut (3).
(3)
Remove nut (4) and remove air supply valve (5), preformed packing (6) and diffuser assembly (7). Install nut (4)
on gland nut (3) back on air supply valve (5).
(4)
Remove diffuser assembly (7) and preformed packing (8).
(5)
Remove relief valve (9).
(6)
Remove connector (10) and preformed packing (11).
4-40
