TM 5-4220-225-14
4-20.
Air Supply Tube .
This task covers:
Replace
INITIAL SETUP
Tools
Materials/Parts
3/4-inch Box and Open End Wrench (Item 40,
Halocarbon Grease 25-53 (Item 10, Appendix E)
Appendix B)
Air Supply Tube
13/16 -inch Box and Open End Wrench (Item 8,
Tie Wraps
Appendix B)
MK12 Test Set (Item 44, Appendix B)
Reference
Para. 4-11 General
Replace. (figure 4-13)
WARNING
Cleanliness is imperative in maintaining and handling diving system components. All tools and parts must
be kept free of oil, grease, rust, or other contamination in accordance with accepted Army diving cleaning
procedures. Foreign substances within an assembly could result in equipment failure and possible injury
or death to personnel.
Ensure that all air lines and components removed or openings into the air system that provides breathing
air are covered with a plastic bag and secured with a rubber band or taped shut. Small components
should be stored in a plastic bag and sealed. Failure to do so will cause air system to become
contaminated and could result in injury or death to the diver.
CAUTION
Shield the front viewport inner surface with cardboard or other material to avoid marring or scratching.
(1)
Remove helmet liner (1).
(2)
Remove plastic tie wraps binding air supply tubing (2) and microphone wiring lead (3).
(3)
Remove microphone (4) from air supply tubing (2).
NOTE
If tubing will not clear the adapter and supply valve, loosen supply valve nut until the valve is movable.
(4)
Loosen two connector nuts (5) and remove air supply tubing (2) and two preformed packings (6).
4-36
