TM  10-3930-643-34 HYDRAULIC  SYSTEM  TROUBLESHOOTING  AND  MAINTENANCE. 12-4. Inlet Valve Assembly. (Sheet 5 of 6) ASSEMBLY NOTE Lubricate  all  preformed  packings, and  housing  before  installing. 15. Using a 1-1/2” open end wrench, install new preformed packing (21) and plug (20) in housing (22). 16. Install new preformed packing (18) and ring (17) on poppet (19). 17. Install items 19 thru 17 as an assembly, piston (15) and spring (14) on poppet (16). 18. Install items 19 thru 14 as an assembly in body (13). 19. Install ring (11), new preformed packing (10), poppet (9) and spring (8) in plug (12). 20. Install new preformed packing (7) on plug (12). Go to sheet 6 12-31