TM 5-4310-387-14
5-22. First Stage Valve Head and Valve Assembly.
This task covers:
a.
Replace
b.
Repair
INITIAL SETUP
Tools
General Mechanic's Tools Kit (NSN 5180-00-177-7033)
Torque Wrench (NSN 5120-00-247-2540)
TSP Ultrasonic Cleaner (NSN 4940-00-164-8997)
Materials/Parts
Preformed Packing
Valve Assembly
Valve, Head
Cloth, Lint Free (Item 8, Appendix E)
Equipment Condition
Compressor unit shutdown and depressurized
(para. 2-12).
Inlet filter and adapter assembly removed
(para. 4-17).
Storage tray removed (para. 4-15).
References
Cleaning Procedures, Chapter 4, Section VI.
Appendix F Torque Values.
a.
Replace. (figure 5-29)
WARNING
Cleanliness is imperative in maintaining and handling diving air system components. All tools
and parts must be kept free of oil, grease, rust, or other contamination in accordance with
Chapter 4, Section VI of this manual. 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.
(1)
Loosen connector nut (1) and disconnect line (2).
(2)
Loosen connector nut (3) and disconnect line (4).
(3)
Remove four bolts (5) and lockwashers (6), and remove valve head (7) and two preformed packings (8).
(4)
Remove valve assembly (9) and preformed packing (10). Discard preformed packing.
(5)
Install valve assembly (9) and new preformed packing (10).
(6)
Install valve head (7), two preformed packings (8), and secure with four bolts (5) and lockwashers (6).
Refer to Appendix F for torque values.
(7)
Install line (4) and tighten two connector nuts (3).
5-62
