TM 5-4310-387-14
6-9. First Stage Piston and Connecting Rod Assembly.
This task covers:
a.
Replace
b.
Repair
INITIAL SETUP
Tools
Materials/Parts (Cont)
General Mechanic's Tool Kit (NSN 5180-00-177-7033)
Tape, Pressure Sensitive (Item 22, Appendix E)
Caliper Set (NSN 5210-00-554-7134)
Bands, Rubber (Item 4, Appendix E)
TSP Ultrasonic Cleaner (NSN 4940-00-164-8997)
Pliers, Retaining Ring (NSN 5120-00-789-0492)
Equipment Condition
Materials/Parts
Fanwheel removed (para 5-36).
First stage cylinder removed (para 6-8).
Preformed Packing
Second stage cylinder removed (para 6-10).
Piston
Third stage cylinder removed (para 6-12).
Piston Rings
Connecting Rod
References
Gasket
Retaining Rings
Cleaning Procedures, Chapter 4, Section VI.
Bags, Plastic (Item 3, Appendix E)
Appendix F Torque Values.
a. Replace. (figure 6-2)
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)
Remove four screws (1), washers (2), plate (3), and gasket (4). Discard gasket (4).
(2)
Remove two screws (5), plate (6), and oil pump cam (7).
(3)
Remove two retaining rings (8), wrist pin (9), and piston (10). Discard retaining rings (8).
(4)
Remove second stage piston assembly (para 6-11).
(5)
Remove third stage crosshead assembly (para 6-13).
6-12
