TM 10-3930-669-34 15-8.  MAST SECONDARY CYLINDER REPAIR (CONT). CAUTION Keep  rod  straight  and  concentric  in cylinder.  Do not allow rod to become wedged    in    cylinder    or    damage    to cylinder or rod may occur. (5) Remove rod (5) from cylinder (1). (6) Remove   wear   ring   (6)   from   rod   (5).      Discard wear ring. (7) Remove   wiper   (7)   from   cylinder   (1).      Discard wiper. (8) Remove  two  wear  rings  (8)  and  seal  (9)  from cylinder (1).  Discard wear rings and seal. (9) Remove  screw  (10)  and  seal  (11)  from  cylinder (1).  Discard seal. (10) Remove cylinder (1) from chain vise. 15-52