TM 5-4220-227-14
4-24. Depressurization Valve and Gage (Medical Lock).
This task covers:
Replace
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
Equipment Condition
Valve
Pressure Gage
Chamber shut down (para. 2-15).
Replace. (figure 4-6)
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.
(1)
Remove silencer (1) from fitting (2).
(2)
Remove fitting (2) from valve (3).
(3)
Remove valve (3) from tee fitting (4).
(4)
Remove gage (5) from tee fitting (4).
(5)
Remove tee fitting (4) from chamber.
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.
(6)
Apply teflon tape to all pipe threads.
(7)
Install tee fitting (4) on chamber.
4-22
