TM   5-4220-231-14&P 5-13.   Check Valve Cartridge (CRS). See Figure 5-12. This    task    covers: Repair INITIAL   SETUP Tools Equipment Conditions General Mechanics Tool    Kit Remove Check Cartridge Valve    (Para 4-30) O-ring Installation and Removal Tool Materials/Parts Reference Bags, Plastic (Item    6,  Appendix D) Para. 3-13, Maintenance and Reentry Control Procedures Valve, Check Cartridge 13229E4580 Rags, clean, lint-free (Item 15,   Appendix D) Silicone Compound (Item    9,  Appendix D) Soft    Goods Kit,   CPV 13230E4946 Nonionic Detergent Solution (NID)   GP, (Item    17,   Appendix D) WARNING Inspect all  seating and sliding metal surfaces for   damage that might cause leaks or   faulty    operation. Replace any    defective items. NOTE Perform in  a  clean environment. NOTE Clean metal parts with   nonionic detergent solution (NID)   (Item 17, Appendix D).  Wipe with  clean rags (Item    15,   Appendix D)  to   got desired level of  cleanliness. NOTE Lubricate sliding contact surfaces before reassembly with   halocarbon grease (Item 13,   Appendix D). NOTE O-ring (8)   is   installed between manifold and check valve cartridge (1)   and is  to   be   removed, cut,   and    discarded when check valve cartridge (1)   is  removed (left-hand threads) from    manifold. Change 5 5-51