deeretech
Guest
I don't know alot about the cat combine, but i think the 9860sts is kind of a bandaid class 8 combine. The seperator and cleaning system are the same size as 9660sts, but with more horsepower and bigger drive sheaves and belts to handle the power. But over the history of jd combines a change of model number in the last 2 digits usually is just a rifinement of the previous model, and in 2 years a whole new model will be out, usually. On the other hand i have talked to a guy with a 9860sts and a 635F and he can't keep it full in 40 to 50 bushel soybeans anyway.