making   any   correction,   check   and   record   centrality of   all   four   rollers.   c)   If   roller   centrality   is   beyond specified   tolerance,   rollers   anti/or   shoes   can   be interchanged. Recheck   centrality   after   each   change. Be   sure   to   recheck   roller-to-roller   dimension   as   in step  k  above. m.  Place  the  cam  ring  atop  the  hydraulic  head with   the   directional   arrow   pointing   clockwise.   Re- member   that   pump   rotation   is   always   expressed   as viewed  from  the  drive  end. The  pump  will  not  de- liver   fuel   with   incorrect   assembly   of   the   cam   ring. n.  Place   the   governor   weight   retainer   (123)   in position   over   the   drive   on   the   distributor   rotor. Make   sure   the   assembly   marks   on   the   weight   retain- er   and   the   distributor   rotor   line   up   with   each   other. AssembIe  the  snap  ring  to  its  groove  with  the  snap ring   pliers. o.   WhiIe   holding   this   assembly   carefully   together so  file  rotor  will  not  fall  out,  invert  the  entire  unit so   that   the   governor   weight   retainer   engages   the   bar on  the  holding  fixture. p.   Install   delivery   valve   (141)   making   sure   that   it operates   freely   in   its   bore.   Install   delivery   valve spring  (140)  and  a  new  delivery  valve  stop  (139).  The stop  screw  (138)  internal  hex  has  one  end  which  is slightly   relieved   to   clear   the   deIivery   valve   stop.   Be sure   it   faces   down.   Start   the   stop   screw   using   the hex  head  end  of  the  delivery  valve  extractor  and  finish tightening  with  a  torque  wrench  to  85-90  inch-pounds. q.   Insert   the   two   rotor   retainers   (120)   by   lifting the  head  up  slightly  so  that  the  inside  face  of  the  head is   flush   with   the   rotor   end.   Position   the   retainers and  install  the  retaining  ring  (119). r.   Insert   the   transfer   pump   liner   (72)   so   that   the large   slot   is   in   line   with   the   head-locating   screw   hole, and   the   letter   “C”,   which   signifies   pump   rotation, faces   up. This   wiIl   correctly   position   the   liner   locat- ing  slot  to  accept  the  locating  pin  in  the  end  plate. s.   Carefully   p   lace   the   transfer   pump   blades   (67- 70)–in   their   slots   in   the   transfer   pump   rotor.   With one   finger,   rotate   the   liner   several   times   to   test   for bind.   Return   the   liner   to   correct   position. t.   Insert   the   transfer   pump   seal   (71)   and   mount the–end  plate  (59)  so  that  the  inlet  fitting  is  in  line with   the   metering   valve   bore,   The   locating   pin   will now  line  up  with  the  locating  slot  in  the  liner.  If these   are   180   out   of   alignment,   check   the   end   plate for  correct  location  of  the  pin  as  to  pump  rotation (C  is  on  the  outside  of  the  end  plate).  Fasten  loosely with  four  screws  (60)  and  washers  (61,  62);  do  not tighten   screws. u.  Slip   the   head   and   rotor   assembly   (145),   drive end–up,  into  open  end  of  holding  fixture.  Place  the slx  governor  weights  (116)   in  their  sockets  with  the slots   facing   the   bore   of   the   assembly.   Place   the   gov- ernor   sleeve   thrust   washer   (118)   against   the   governor thrust   sleeve   (117)   so   that   the   chamfered   edge   faces the   sleeve.   Insert   the   forefinger   into   the   bore   of   the sleeve   and   washer,   holding   them   together,   and   in- sert  them  into  the  slots  of  the  governor  weights  by tilting   the   weights   slightly   back.   The   tab   on   the thrust   sleeve   flange   should  face  upward.  Sight across   the   tops   of   the   assembled   weights   to   ascer- tain   correct   positioning.   One   weight   higher   than others  indicates  incorrect  assembly  of  the  thrust washer. v.  Place  the  governor  arm  (86)  in  position  with the–fork  for  the  governor  linkage  hook  facing  the  end plate.   Insert   the   pivot   shaft   (85)   (knife   edge   facing end  plate)  and  assemble  the  two  seals  (83,  84)  and  cap nuts  (81,  82). Tighten   the  cap  nuts   simultaneously   to a  torque  of  35  to  40  inch-pounds. w.  The  hydrauIic  head  arid  rotor  assembly  (145), including   the   transfer   pump,   cam   ring   (122),   governor weight   retainer   (123),   weights   (116),   governor   thrust sleeve  (117),  and  washer  (118),  should  now  be  assem- bled  into  the  housing. x.  Cover  shaft  knurls  with  tape  and  instaII  a  new seal   (143)   on   the   hydraulic   head.   Rotate   the   cam ring  so  that  the  threaded  hole  is  in  line  with  the metering   valve   bore. This   will   insure   proper   posi- tion  of  the  cam. Apply  a  light  film  of  clean  grease around  the  inside  edge  of  the  housing  to  aid  in assembly. y.  Grasp  the  hydraulic  head  firmly  in  both  hands and  insert  it  into  the  housing  bore  with  a  slight  ro- tary  motion.  Do  not  force. z.   If   the   assembly   should   cock   during   insertion, withdraw   and   start   over. This   is   particularly   impor- tant,  as  cocking  can  cause  particles  of  metal  to  be shaved  off  the  housing  and  left  in  the  pump,  causing serious   damage   in   operation. aa.   When   inserting,   make   sure   the   assembly   is wrong  into  position  past  the  hydraulic  head  seal  (143). Failure   to   do   this   might   cause   damage   to   the   seal, resulting    in    leakage. When  the  head  and  rotor  are finally   assembled   in   their   approximate   location,   ro- tate  them  until  the  head  locking  screw  holes  line  up with   their   corresponding   holes   in   the   housing.   In- sert   the   head   lotting   screws   (146,   147)   finger   tight. ab.  Invert  the  pump  and  holding  fixture  in  the  vise so  the  bottom  faces  upward. ac.   Insert   and   tighten   the   head   locating   screw   (103). — ad.  InstalI  seals  on  piston  plugs  (96,  111). — ae.   Install   piston   ring   seal   (106)   and   piston   ring. — af.   Assemble   advance   adjusting   screw   (112) (trimmer),   advance   spring   (108)   and   spring   washer (109). ag.   Place   trimming   screw   (112)   and   spring   as- sembly  (108)  in  piston  cavity  (power  side)  and  secure with  retaining  ring  (110). 14-49