Depressurization Valve and Gage (Medical Lock).

Section V. UNIT MAINTENANCE PROCEDURES - TM-5-4220-227-14_120

Figure 4-6. Depressurization Valve and Gage, Replace

TM-5-4220-227-14 MK12 Surface Supported Diving System (SSDS) (NSN 4220-01-097-5674) Manual
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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

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