TM 10-3930-671-24 Installing & Timing A New Fuel Injection Pump WARNING Bodily    Injury    may    result    during    the    timing operation of the fuel injection pump n the engine is  running.    Do  not  attempt  to  adjust  the  timing without     the     pump     mounting     bolts     securely torqued. NOTE To  obtain  access  to  the  Internal  timing  marks, the  original  manufacturer’s  sell  will  have  to  be broken.        These    sea    is    should    therefore    be removed only by authorized personnel who must reseal    when    the    adapter    plate    or    cover    is replaced.    Otherwise,  the  warranty  may  become void. 1. Repeat preceding Steps 1 thru 11 of Reinstalling & Timing the Original Fuel Injection Pump. 2. Rotate crankshaft until #1 piston is on compression   stroke   and   timing   mark   13°-150 BTDC lines up with the pointer in bell housing or crankshaft pulley. NOTE Be sure that #1 piston is on compression stroke by  turning  both  push  rods  by  hand,  Indicating both valves are closed. 3. Remove  inspection  plate  on  the  injection  pump housing.    Turn  pump  until  Line  "A"  on  the  drive  shaft lines up with the flat end of the circlip. 4. Tighten pump mounting bolts. 5. Rotate crankshaft approximately 500 counterclock-wise.          Then     rotate     clockwise, stopping at 13°- 150 BTDC.  Recheck that Line 'A"  is  still  in  line  with  flat  end  of  circlip.    If  not, reset. 6. Replace inspection plate on the injection pump. 7. Repeat preceding Steps 14 thru 17. 8. Restamp   the   pump   to   adapter   scribe   marks. Fuel Recommendations Diesel  fuel  selection,  handling,  and  filtration  Is  of  great importance.  The fuel not only supplies the energy for all the work done by the engine, it also lubricates the parts of the fuel injection system which operate with very close tolerances.      Fuel   that   contains   water,   abrasives,   or sulphur  in  excess  of  the  recommended  specifications can cause extensive damage to the injection pump and engine. Diesel Fuel Specifications TMD27    diesel    engines    have    been    designed    and developed to use No.  1-D (light fuel) and preferably No. 2 (heavy fuel), which can be a cracked residual, a blend of preferably a straight-run distillate having characteristics including the following selected items: Cetane Number ......................... 50 desired, 45 minimum Water and Sediment  ............. 0.05% maximum by weight Total Sulphur ........................................... 0.5% maximum F-208