TM 10-3930-669-20 (3) Loosen  fitting  (6)  and  remove  hose  (7)  from elbow (8). (4) Remove elbow (8) from elbow (9). (5) Remove  elbow  (9)  and  preformed  packing  (10) from   pivot   cylinder   (5).      Discard   preformed packing. (6) Remove grease fitting (11) from pin (12). (7) Remove screw (13), lock washer (14), pin (12), two  washers  (15),  and  pivot  cylinder  (5)  from mast (16).  Discard lock washer. (8) Remove screw (17), lock washer (18), pin (19), and   pivot   cylinder   (5)   from   pivot   and   shift assembly (20).  Discard lock washer. b.  Installation. (1) Install   pivot   cylinder   (5)   on   pivot   and   shift assembly  (20)  with  pin  (19),  lock  washer  (18), and screw (17). (2) Install  pivot  cylinder  (5)  on  mast  (16)  with  two washers  (15),  pin  (12),  lock  washer  (14),  and screw (13). (3) Install grease fitting (11) in pin (12). (4) Install  elbow  (9)  and  preformed  packing  (10)  in pivot cylinder (5). (5) Install elbow (8) on elbow (9). (6) Install  hose  (7)  on  elbow  (8)  and  tighten  fitting (6). 17-29