TM5-6115-585-34 NAVFAC  P-8-262-12 TO-35C2-3-455-2 TM-05684C-34 Table  7-1.  Button  Code  Letter  and  Size Code No. Or Letter 16 15 14 13 12 1 2 3 4 5 s R P N M A B c D E Part  No. 147A186 147A187 147A188 147A189 147A190 147A147 147A148 147A149 147A150 147A151 Size 0.134 0.131 0.128 0.125 0.122 0.119 0.116 0.113 0.110 0.107 (b)  Remove  delivery  valve  cap  nut  and  delivery valve  holder  (figure  7-43).  A  12  point  socket  or  box wrench  must  be  used  on  delivery  valve  holder  to  keep from  damaging  this  part.  Lift  out  delivery  valve  spring only,  and  leave  it  out,  replacing  delivery  valve  holder, and  delivery  valve  cap  nut  and  gasket. (c)  Turn  blower  wheel  clockwise  until  Number 1  cylinder  (closest  to  blower  wheel)  is  on  compression stroke,  which  follows  closing  of  intake  valve. (d)  Set  throttle  lever  on  injection  pump  to  wide open   or   up   position   (compress   stop   solenoid   plunger spring   or   remove   stop   solenoid   assembly).   Connect Number  1  cylinder  fuel  line  to  Number  1  pump  outlet so   that   fuel   line   projects   from   the   engine,   hanging down.  Position  receptacle  for  fuel  under  the  line.  Con- nect  lines  from  fuel  supply  to  transfer  pumps,  trans  - fer   pumps   to   filter,   and   filter   to   injection   pump, operate   fuel   transfer   pumps   to   obtain   fuel   pressure at   injection   pump.   This   can   be   done   on   the   unit   by turning   master   switch   to   PRIME   &   RUN,   or   just   by applying  24  volts  dc  across  the  transfer  pump.  Ro- tate  blower  wheel  about  one  inch  counterclockwise  so that  P.C.  mark  is  below  timing  pointer  hole. (e)  Rotate  blower  wheel  clockwise  until  fuel flows   from   Number   1   cylinder   fuel   line.   Continue rotating  slowly  clockwise  until  fuel  stops  flowing.  The point  at  which  fuel  stops  flowing  from  Number  1  cyl- inder   fuel   delivery   line   is   the   injection   pump   port closing   point.   Stop   rotation   of   engine   at   exactly   the port  closing  point  (l-2  drops  in  5-10  seconds). (f)  Check  timing  pointer  in  the  timing  port  on the   side   of   the   generator   adapter   (figure   7-44).   If 7-40 Figure   7-44.   Timing   Port   and   Port   Closing   Mark timing   pointer   coincides   with   the   P.C.   mark   stamped on  flywheel,  the  injection  pump  button  thickness  is correct.  If  the  P.C.  mark  on  flywheel  is  below  the pointer,   injection   pump   is   closing   early,   and   will   re- quire   a   thinner   button.   If   the   P.C.   mark   on   flywheel is  above  the  pointer,  injection  pump  is  closing  late and  will  require  a  thicker  button.  Each  mark  on  fly- wheel   indicates   a   difference   of   0.006   inch   button thickness  or  2  steps  in  button  code  number.  (Example: The   P.C.   mark   on   flywheel   is   above   pointer.   The pointer   indicates   1-1/   2   marks   difference.   A   button 0.009   inch   thicker   or   3   steps   difference   in   button number   code   is   indicated.   Since   a   Number   12   or   M button  is  installed,  a  letter  R  button  is  needed.  ) (g)   Remove   injection   pump   and   insert   proper timing   button,   taking   the   same   precautions   not   to   lift the   assembly   containing   face   gear,   when   removing timing  button. (h)   Repeat   injection   pump   installation. (i)  Check  injection  port  closing  point  by  re- peating   steps   three   through   six.   The   timing   pointer should  indicate  the  P.C.  mark  on  flywheel.  In  no  case should  pointer  be  more  than  1/2  mark  away  from  the P.C.   mark. (j)   Install   delivery   valve   components.   Be   sure ll   parts   are   clean,   and   assembled   carefully   and