TM 5-4220-227-14
4-29. Pressure Relief Valve Assembly
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)
Grease, Halocarbon (Item 13, Appendix E)
Materials/Parts
Equipment Condition
Pressure Relief Valve Assembly
Preformed Packing
Chamber shut down (para. 2-15).
Leak Test Compound (Item 7, Appendix E)
Replace. (figure 4-11)
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 four nuts (1), lockwashers (2), and bolts (3).
(2)
Remove pressure relief valve assembly (4) and preformed packing (5).
(3)
Lubricate preformed packing (5) and place in groove in flange (6).
(4)
Install pressure relief valve assembly (4) on flange (6) and secure with four bolts (3), lockwashers (2), and nuts
(1).
(5)
Pressurize system, and using test compound, check for leaks.
4-32
