TM 5-4220-227-14
5-42. Ball Valves 3/4 Inch (Air Supply Manifold) (Cont).
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.
(9)
Apply teflon tape to all pipe threads.
(10)
Install valve (11) and pipe (12) on manifold (13).
(11)
Install valve (8) and pipe (9) on manifold (13).
(12)
Install valve (5) and pipe (6) on manifold (13).
(13)
Install valve (2) and pipe (3) on manifold (13).
(14)
Pressurize system and check for leaks.
b. Repair. (figure 5-65)
NOTE
There are four ball valves. The repair of each valve is the same.
(1)
Remove ball valves (para. a. above).
(2)
Remove four nuts (1), bolts (2), connectors (3) and (4), and indicator tag (5) from valve body (6).
(3)
Remove and discard two teflon seats (7).
(4)
Remove ball (8) from valve body (6).
(5)
Remove lever nut (9) and handle (10) from valve body (6).
(6)
Remove gland nut (11) from stem (12).
(7)
Remove and discard two teflon packings (13) and remove stem (12).
(8)
Clean all components using nonionic detergent cleaner and rinse with clean distilled water.
5-146
