TM  10-3930-643-34 GENERAL  SUPPORT  BRAKE  MAINTENANCE.  (cont) 17-2. Pressure Converter (S/N 2001 to 2903). (Sheet 6 of 7) ASSEMBLY 23. 24. 25. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. Install spring (31) in groove of piston (27). Install new cup (30) over spring (31) and new felt (29) on piston. Install  new  preformed  packing  (28)  in center hole of plate (26). Install items 31 thru 27 as an assembly and items 28 and 26 as an assembly  together. Install retainer (24) and seal (23) on piston (20). Lubricate  rod  (25)  with  clean  brake fluid  and  install  piston  assembly (20). Lubricate  regulating  valve  (22)  and install in valve (21) Install valve (21) on rod (25). Using  snap  ring  pliers,  install  new ring (19) in piston assembly (20). Lubricate and install two new seals (18) and new preformed packing (17) on bushing (16). Install assembly Install Install assembly, rod  (25). items 19 thru 16 as an on rod (25). spring (15). items 31 thru 26 as an washer (14) and nut (1 Tighten  nut  13  to  30 3) on lb-ft. Go to sheet 7 17-14