TM  10-3930-643-34 BRAKE  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 8-15. Governor Assembly. (Sheet 4 of 5) ASSEMBLY NOTE 12. 13. 14. 15. 16. 17. 18. 19. Apply thread sealant before installation. Using a socket head screw key, install plugs (26 thru 23). Using  long  round  nose  pliers,  install filters (22 and 21) in body (27). NOTE Before  further  assembly,  lubricate lower bore of body, top of piston, piston  grooves,  preformed  pack- ings,  guide,  grommet and screw with grease. Using internal snap ring pliers, install new grommet (19) in piston (20). Using  internal install  washer ring  (17). Using  internal snap ring pliers, (18) and retaining snap ring pliers, install valve (16), spring (15) and retaining ring (14). Small end of spring must be toward valve (16). Install  new  preformed  packings (13 and  12). Install spring (11) and exhaust stem (10) in piston (20). Install items 12 thru 20 as an assembly in body (27). Go to sheet 5 8-78