TM 5-4220-227-14
5-43. Ball Valves 1 Inch (Air Supply Manifold).
This task covers: Replace
b. Repair
INITIAL SETUP
Tools
Materials/Parts (Cont)
General Mechanic's Tool Kit
Bands, Rubber (Item 4, Appendix E)
(NSN 5180-00-177-7033)
Bags, Plastic (Item 3, Appendix E)
Tape, Teflon (Item 21, Appendix E)
Materials/Parts
Cloth, Lint Free (Item 6, Appendix E)
Detergent, Nonionic (Item 8, Appendix E)
Ball Valve 1 inch
Distilled Water (Item 9, Appendix E)
Ball Seats (2)
a. Replace. (figure 5-66)
WARNING
To prevent the spread of disease, serious injury and/or death, oxygen breathing systems must be
maintained hygienically clean and free from dust, dirt, and all hydrocarbon contamination. Refer
to oxygen system prework procedures para. 4-10 to avoid violating this warning.
CAUTION
Use two wrenches to remove and install all piping components to avoid damage .
NOTE
This procedure is typical for both 1 inch valves on the air supply manifold. Remove only the suspected
faulty valve. It is not necessary to remove the entire air supply manifold to replace a valve.
(1)
Remove two fittings (1), tee (2), and fitting (3).
(2)
Remove two valves (4).
WARNING
Leave 1 1/2 threads exposed on fitting when applying teflon tape. This will ensure that no teflon tape will hang
down inside the air system. Teflon tape should be wrapped in such a manner that when the fitting is tightened
the tape will not loosen. Failure to wrap teflon tape correctly may result in contamination or blockage of the air
system and subsequent possible injury or death to the diver.
(3)
Apply teflon tape to all pipe threads.
5-150
