In Reply to: TX66 posted by TIM on April 04, 2002 at 11:40:04:

Try wedging the concave for almost zero clearance at the back and run as slow a cylinder speed as possible,and I always run both plates up as I've removed a lot of the wires in that area.Sometimes the wheat is shrunk down tight in the head due to conditions.It seems you always have to have a certain amount going through the returns and probably more important is to keep the combine full.If you still think you are cracking to much go look at your neighbour's John Deere and you'll probably change your mind.