TM  5-4220-231-14&P 5-7.    Check    Valve   (VTA).    See    Figure   5-6. This   task    covers: Repair INITIAL  SETUP Tools Equipment Conditions General Mechanics Tool   Kit Remove Check    Valve    (Para.     4-18) 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     13229E4646 Grease, Halocarbon (Item.  13,  Appendix D) lsopropyl     Alcohol   (Item   1 or  2,  Appendix D) Rags,    clean,    lint-free    (Item   15,  Appendix D) Repair Kit, 13229E4661 Silicone Compound (Item   9,   Appendix D) Water, Distilled (Item   10,  Appendix D) 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 item. 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. Change 5 5-27