TM 10-3930-664-24 20. Ensure  that  spool  and  sleeve  assembly  is  flush with   15   hole   end   of   housing.      Clean   upper surface of housing by  wiping  with  palm  of  clean hand. 21. Install   balls   (14),   retainer   plugs   (13),   and   two springs (12).  Ensure springs are properly seated in holes. 22. Install  new  seal  (11).    Install  spacer  plate  (10) onto  housing  (4),  ensuring  proper  alignment  of bolt holes. 23. Rotate spool and  sleeve  assembly  (21)  until  pin (23) is parallel with port face of housing (4). 24. Install    drive    (9),    ensuring    drive    fork    is    fully engaged  with   pin   (23).      Mark   top   of   drive   as shown in "B" on following page. 3-154