i think i maby find the reason, Wrong dipstick!!!
and also wrong info in the service manual, my manual says 2.27 Liters without oil filter, and then it is to the mark "full" on dipstick,
but when i go to John deere home site it says max oil without oil filter 1.9 liter, so i have about 0,4 liter to much oil in the engine!!!!, i took the air intake off today and i could not believe my eyes, about 2-3 dl oil drained out and the intakes was totally covered with oil, the smoke and burning oil comes from crankcase vent, and ofcourse with 0.4l to much oil in the engine it will overflow, have not had the chance to test if this is the issue, but im pretty sure i solved the problem.
what do you guys think?, 0.4l to mutch oil can force oil out the crankcase vent?