Tractor Repair: MF 135 Rough idle stall low RPMs, mf 135, timing gears

Question
I have a MF 135 AD3.152 Diesel it just started to idle rough when sitting still or slowing down. then it will stall if I don't increase the RPMs. Injector & engin have been completly rebuilt.

Answer
  Hello,

  Check the simple things first.  Recheck to make sure the injection timing is correct.  After having an engine rebuilt, the valve clearances usually have to be re-adjusted after running the engine for awhile.  Make sure all fittings are tight so no air is being drawn into the fuel system, and adjust the idle speed.  If this problem just started after having the engine rebuilt, possibly the timing gears are not timed correctly.