TM 10-3930-669-20 17-6.  TILT CYLINDER REPLACEMENT (CONT). (2) Remove two grease fittings (5) from pins (6). (3) Remove  two  screws  (7),  lock  washers  (8),  pins (6),  and  tilt  cylinder  (9)  from  rail  (10)  and  mast (11).  Discard lock washers. NOTE Mark direction of elbows before removal. (4) Remove  two  elbows  (3  and  4)  and  preformed packings   (12)   from   tilt   cylinder   (9).      Discard preformed packings. b.  Installation. (1) Install two preformed  packings  (12)  and  elbows (3 and 4) in tilt cylinder (9). (2) Install tilt cylinder (9) on rail (10) and mast (11) with  two  pins  (6),  lock  washers  (8),  and  screws (7).  Tighten screws to 40 lb-ft (54.2 N•m). (3) Install two grease fittings (5) in pins (6). 17-24