In good corn, 180-200 bu., You will be pushing the capacity of that JD 6620. Really pushing if you have any slopes and or high moisture. The JD 6620 was a perfect 4 x 38 machine but 6 x 30 will make you run out of chaffer capacity on slopes and straw walker area in heavy fodder corn. In really good corn 2-2.5 mph may be all you will get out of this machine but that is still going to give you good bushels per hour.
The JD 216 bean head will be no trouble. Many run JD 220 head without issues in soybeans.
Now don't think I am running down a JD 6620. They are a great smaller farmer combine. Good cabs and simple to work on. Parts are readily available, many after market too. So the costs are held down some what. So enjoy your harvest.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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