scribe,   disengage   and   remove   the   rotor   retainer snap  ring  (119). This   releases   the   rotor   retainers (120)  which  should  now  be  moved  outward  as  far  as possible   to   clear   the   rotor.   Gently   lift   the   hydraulic head   (144)   off   the   distributor   rotor   (142).   Invert   the head  and  shake  out  the  rotor  retainers  (120). (19)  Lift  off  cam  ring  (122).  Check  and  record roller-to-roller   dimension   as   instructed   in   assembly procedure.   This   dimension   should   be   1.977   ± 0.0005.   Remove   rollers   (129,   130),   shoes   (131,   132) and   plungers   (133,   134),   only   if   damaged.   Otherwise secure   these   parts   by   using   the   transfer   pump   seal (71). NOTE Reassembly   may   be   more   easily   accom- plished  if  the  leaf  springs  (127,  128)  are not   removed   and   shoes   with   rollers   re- main   installed   in   their   original   positions. Leaf  springs,  if  removed,  should  first be  marked  with  a  dye  for  original  position reassembly. Do  not  remove  locating  pin from  spline  end  of  rotor. (20)  Remove  the  governor  weight  retainer  snap ring  (121)  using  snap  ring  pliers. (21  )  Using  suitable  tool  and  supporting  the  head on   a   flat   surface,   press   the   rotor   (142   from   the weight  retainer  (123  ). (22)  The  flexible  retaining  ring  should  be  repIac- ed   whenever   the   pump   is   disassembled.   Insert   the snap   ring   pliers   in   the   closed   position,   under   the flexible  retaining  ring  between  any  two  of  the  rivets. Expand  the  pliers  while  applying  pressure  in  an  up- ward   direction.   A   slight   twisting   motion   wiIl   snap the  ring  off  the  rivet. Repeat   this   process   until   the retaining   ring   is   free   from   all   rivets.   Discard   the flexible    retaining    ring. 14-44.  Fuel  Injection  Pump,  Inspection  and  Repair. a. Inspection. — (1)  Transfer  pump  blades.  Inspect  carefully. Check  for  chipping  on  any  of  the  edges,  pitting,  im- bedded   foreign   particles   or   wear   on   the   rounded   ends. Inspect   flat   surfaces   visually   for   scores. (2)   Plungers. While  holding  the  rotor  under clean   oil,   insert   the   plungers   into   their   bore.   With thumb   and   forefinger   over   the   guide   slots,   tilt   from side   to   side   several   times   to   insure   complete   freedom of  movement.  Interchanging  or  reversing  their  indi- vidual   position   may   be   necessary,   as   these   are matched   parts. Repeat   with   short   set   without   remov- ing   first   set.   Replace   defective   parts.   If   the   plungers stick,   but   are   not   visibly   damaged,   clean   both   plungers and   bore   with   a   soft   brush   and   lacquer-removing   sol- vent   such   as   lacquer   thinner   or   acetone.   (Do   not   force plungers  into  their  bore  and  do  not  handle  rotor shank). (3)   Distributor   head   and   rotor.   Examine   the radii   contacted  by   the   springs,   and   the   weight retainer   drive   spline   for   wear.   Check   all   slots, charging   and   discharge   ports   for   chipping   or   ero- sion   of   edges   and   the   rotor   shank   for   scratches.   If damage   or   excessive   wear   is   apparent,   the   head   and rotor   must   be   replaced   as   a   mated   unit.   Examine the   rotor   timing   pin   for   damage.   Check   alignment of  tang  (at  side  of  rotor  locating  pin)  with  center  of shoe   slot   and   rotor   discharge   port. (4)  Hydraulic  head  vent  wires.  Check  the  vent wire  in  the  hydraulic  head  air  bleed   passage   for   free- dom   of   movement.   If   the   wire   is   free,   flush   the head  and  blow  out  all  passages  with  clean,  dry  air. If   vent   wire   is   stuck,   replace   it   after   thorough   clean- ing  of  the  passage. (5)   Cam   rollers   and   shoes.   Check   each   roller in  its  shoe  for  freedom  of  rotation,  and  the  top  edge of   each   shoe,   where   retained   by   the   leaf   spring,   for chipping   or   excessive   wear.   Improved   roller   sur- faces   will   result   from   long,   normal   operation   in clean   fuel (6)  Leaf  springs. Check   for   cracks,   nicks,   or chipping,  or  distortion  of  leaf  spring  and  wear  at points  where  the  radii  on  the  rotor  and  along  the steps  that  retain  the  roller  shoes. (7)   Governor   weights   and   retainer.   Examine the   retainer   sockets   where   weights   pivot,   and   pivot points  of  all  weights  for  wear  and  replace  the  flexible retaining   ring   (119).   If   the   retainer   can   be   assem- bled   to   the   distributor   rotor   by   hand,   the   retainer hub   must   be   replaced. This   assembly   must   be   a press   fit.   No   free   play   should   be   evident   when   the retainer   is   assembled   to   the   rotor. (8)   Governor   linkage. Inspect  the  pivot  points of  the  governor  arm   (86)   and   pivot   shaft   (85).   Ex- amine   the   governor   arm   toes   where   they   contact   the thrust   sleeve.   If   they   are   worn   flat   on   either   toe, discard   and   replace. The  linkage  gap  should  not exceed  0.025  inch  Examine  the  metering  valve  pin hole   in   the   linkage   hook,   throttle   lever   (40),   shut-off cam  (25),  and  especially  the  throttle  and  shut-  off assemblies   where   joined,   for   looseness   or   burrs. (9)   Metering   valve   and   arm   assembly.   Check the  metering  valve  body  (K3)  for  wear.  Be  sure  the metering   valve   arm   (91)   is   well   seated   and   that   there is  no  radial  movement  of  the  arm  on  the  valve. Check  the  metering  valve  arm  pin  for  wear  or  loose- ness. (10)  Cam.  Since  only  the  working  portions  of the  lobes  on  the    bore  are  ground,  the  tool  marks  be- tween   lobes   should   not   be   considered   damaged.   The cam   finish   is   mottled   from   heat   treatment   rather than  operation. Carefully   inspect   the   bore   and   edges of   all   flat   surfaces.   If   there   is   evidence   of   spalling or   flaking   out,   replace   with   new   cam.   Improved cam   lobe   finish   wilI   result   from   long,   normal   opera- tion  in  clean  fuel  oil. 14-39