TM 10-3930-669-34 15-5. TILT CYLINDER REPAIR (CONT). NOTE Backup  ring  and  preformed  packing may come off during this step. (6) Push   head   (7)   into   cylinder   (3)   until shear ring (8) is seen. CAUTION Keep  rod  straight  and  concentric  in cylinder.        Do    not    allow    piston    to become wedged in cylinder or damage   to   cylinder   or   piston   may occur. (7) Remove   backup   ring   (9),   preformed packing  (10),  and  shear  ring  (8)  from inside of cylinder (3).  Discard backup ring and preformed packing. (8) Remove  rod  (4),  head  (7),  and  piston (11) from cylinder (3). (9) Remove cylinder (3) from chain vise. (10)  Remove   nut   (12),   spacer   (13),   and screw (14) from clevis (15). (11)  Remove  clevis  (15),  retaining  ring  (5), and spacer (6) from rod (4). 15-32