TM 5-4220-227-14
5-33. Shutoff Valves (Oxygen).
This task covers:
Replace
INITIAL SETUP:
Tools
Equipment Condition
General Mechanic's Tool Kit
Chamber shut down (para. 2-15).
(NSN 5180-00-177-7033)
Materials/Parts
Shutoff Valve
Bands, Rubber (Item 4, Appendix E)
Bags, Plastic (Item 3, Appendix E)
Tape, Teflon (Item 21, Appendix E)
Replace. (figure 5-52)
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
Ensure system is depressurized prior to beginning this task.
Gain access to OXL-021 the I/L low pressure O2 supply valve, and OXL-020 the O/L O2
supply valve by reaching up from bottom and behind the instrument panel. Replacement of
the OXL-021 and OXL-020 is the same.
(1) Unlatch two latches (1), open enclosure door (2) and install two supports (3) and pins (4).
(2) Remove nut cap (5) and lockwasher (6) that secures the valve handle (7) to valve (8) and remove handle.
5-110
