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What class size combine do u need for a 16 row head?
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biggrntractor
Posted 11/24/2012 22:05 (#2715103 - in reply to #2714345)
Subject: RE: What class size combine do u need for a 16 row head?


Northern Illinois

 A 16 row head weighs a little shy of 12000 lbs. If you are thinking of a Deere combine, the difference is more or some times less than the machine class alone. As mentioned in this post there is little difference in a 9660 and a 9860, a class 6 and a class 8 machine beside engine and feeder house options. The separators are the same. I always felt the Deere could not efficiently handle a 12 row. In many conditions it was to easy to lose corn out the back as the cleaning shoe didn't seem large enough. We even added the ICC option to our 9770 with little help. I would be concerned on the 60 if the variable speed/reverser would handle a 16 row and even with the optional 70mm lift cyl. would handle the head and the 9660 would need ballast. It seems the 650 tires, the extra weight of 4wd for ballast and 90mm lift cyl seem a good match. As far as production aside from the monitor you need to do the math.
40' x 5280' =  211200 sq.
211200 / 43560= 4.85 ac/hr per mph
4.85 x 5 mph = 24.25 ac/hr
24.25 ac/hr x 150 bu/ac = 3657.5 bu/hr    
With the longer sieve and chaffer and the re thresh in the 680 and 690 we were able to run 4.3 to 4.5 in good corn (not enough of it this year though) with little rotor loss and little sieve loss. Don't mean to start something but this Class system is not very clear and based on manufactures representations 





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