TM 5-4220-225-14
4-18.
Lower Breech Ring Assembly.
This task covers:
Replace
INITIAL SETUP
Tools
Materials/Parts
3/32-inch Hex Wrench (Item 19, Appendix B)
RTV Sealant (Item 1, Appendix E)
Wrench, Torque (Item 14, Appendix B)
Halocarbon Grease (Item 10, Appendix E)
Adapter, Socket Wrench (Item 41, Appendix B)
Lower Breech Ring
Insert, Hex (Item 55, Appendix B)
Replace. (figure 4-11)
(1)
Remove two hex screws (1) and remove lug (2)
(2)
Remove two hex screws (3) and remove lug (4).
(3)
Remove six hex screws (5) and remove jocking harness brackets (6). Note location of brackets for reassembly.
(4)
Remove 14 hex screws (7) and remove lower breech ring (8) and lower breech ring retainer (9) from neckdam
(10) (or drysuit).
(5)
Install lower breech ring retainer (9) on neckdam (10) (or drysuit). Ensure neckdam seam is at rear center.
(6)
Install new lower breech ring (8) on neckdam (10) (or drysuit) and secure with 14 hex screws (7) finger tight.
Apply light film of adhesive sealant.
(7)
Install jocking harness brackets (6) and secure with six hex screws (5).
(8)
Install lower lug (4) and secure with two hex screws (3).
(9)
Install lower lug (2) and secure with two hex screws (1).
(10)
Torque all screws to 18-20 in.-lb (1.7-2.3 Nm) using a staggered sequence.
4-30
