TM 10-3930-671-24 d)   Operate   pump   at   1000   ERPM   wide   open   throttle (WOT)  for  10  minutes.    Dry  pump  off  completely  with compressed   air.      Observe   for   leaks   and   correct   as necessary.    Back  out  the  high  idle,  low  idle,  and  torque screw (if equipped). NOTE Refer to pump specification for correct sequence of test stand adjustments.    Pressurize  the  transfer pump   inlet   to   the   amount   indicated on specification or to a maximum of 5 p.s.i., if not otherwise indicated. e)  Vacuum  Check:    Close  valve  in  fuel  supply  line.    At 400   ERPM,   the   transfer   pump   must   be   capable   of creating a vacuum of at least 18" of mercury.  n it does not,  check  for  air  leaks  between  pump  inlet  and  shutoff valve or deficiency in transfer pump components. f) Fill graduates to bleed air from test stand and to wet graduates. g) Check  the  return  oil  quantity  by  directing  the  return oil  flow  into  an  appropriately  calibrated  graduate  for  a given  time.    See  individual  specifications  for  allowable quantity and ERPM at which to make the check. h) Operate   at   the   specified   speeds   with   wide   open throttle   and   observe   transfer   pump   pressure.      Adjust pressure regulating spring plug to raise or lower transfer pump pressure. CAUTION Under  no  circumstances  should  130 p.s.i.        transfer    pump    pressure    be exceeded.        Damage    to    equipment would result. i) To  adjust  pressure,  remove  the  line  to  the  transfer pump  inlet  connector  and  use  a  socket  head  wrench  to adjust    the    plug.        Clockwise     adjustment     increases pressure.  Do not over-adjust. NOTE Transfer  pump  pressure  gauge  must be isolated by the shutoff valve at the injection   pump   when   checking   fuel delivery and advance movement j) Check for minimum delivery at cranking speed. k) Operate at high speed and adjust high idle screw to obtain  the  specified  delivery.    Recheck  transfer  pump pressure upon completion of this adjustment. m)   Adjust   the   low   idle   screw   to   the   correct   low   idle delivery. n) Automatic   Advance:      Check   the   cam   position   at specified   points   in   the   speed   range.      Adjust   trimmer screw,  as  required,  to  obtain  proper  advance  operation. Each line on advance gauge equals two pump degrees. After  setting  the  advance,  check  to  see  that  the  cam returns to its initial position at 0 RPM.  Recheck transfer pump   pressure   after   setting   advance   and   correct   if necessary. p) Record  fuel  delivery  at  check  points  shown  on  the pump specification.  ROLLER SETTINGS SHOULD NOT BE READJUSTED ON THE TEST BENCH.  Experience has  proven  that  micrometer  and  dial  indicator  settings provide more consistent, accurate results in performance. Variations in test bench drives, instrumentation, nozzles lines and fuels in different areas sometimes result in nonconforming flow readings. q) While   operating   at   full-load   governed   speed,   set torque     screw     (if employed) to specified delivery. Recheck    the    transfer    pump    pressure    and    advance movement upon completion of this adjustment. r) Recheck delivery at lowest speed checkpoint. s) Check governor cutoff at specified speed. t) Check    electric    shutoff    (if    equipped)    at    speeds indicated on specification. u) Remove the pump from the test stand and assemble all  sealing  wires.    Pump  is  now  ready  for  installation  to engine. F-250