SAlESMAN
Guest
Combine class size has two determining factors. 1) Engine horsepower. 2) Hopper capacity. That is all that makes anything a "class whatever". I'm not sure on class 5 or 6, but all you need to be a class 7 is 300+ engine HP. and 300+ grain tank capacity. So I guess a 2388 or 9610 with hopper extensions and the fuel turned up would be class 7 machines. I wish there were more factors, such as throughput capacity, screen area, or seperating area to make a determination, that way we could make a more informed purchase based on thrash capacity and not just HP. and hopper capacity. Hope this helps.