Combines 9500 and corn

Do you have corn inserts in concaveIJ Is concave level and not wore to much.Did you try increasing concave clearance and increasing cylinder speedIJ Try to keep cobs in 1 piece.

I have set up several 9500 and 9400 combines in the following manner for corn and soybeans and everyone has been quite pleased. Make sure of course your cylinder bars and concave are in shape and level. If I need to replace bars I use chrome and I never seem to have a grain cracking problem. Also if the concave needs replaced I update to the so called 10 series. I then modify the concave by pulling every other concave wire and I start in the center of the concave and work my way out which gives me the best balanced pattern. This is simple to do even with the concave in the machine by just removing the front concave plate and pulling wires. I also leave all the concave inserts in the concave with this set up which probably helps with keeping cobs whole. In general you should be able to keep your concave settings a little wider and then run your cylinder a little faster. This setup seems to lessons horsepower requirements and I am able to run just fine with a 9500 and 8 row wide corn head.

I have set up several 9500 and 9400 combines in the following manner for corn and soybeans and everyone has been quite pleased. Make sure of course your cylinder bars and concave are in shape and level. If I need to replace bars I use chrome and I never seem to have a grain cracking problem. Also if the concave needs replaced I update to the so called 10 series. I then modify the concave by pulling every other concave wire and I start in the center of the concave and work my way out which gives me the best balanced pattern. This is simple to do even with the concave in the machine by just removing the front concave plate and pulling wires. I also leave all the concave inserts in the concave with this set up which probably helps with keeping cobs whole. In general you should be able to keep your concave settings a little wider and then run your cylinder a little faster. This setup seems to lessons horsepower requirements and I am able to run just fine with a 9500 and 8 row wide corn head. One other thought if you have a cob and grain cracking problem is to look into your cylinder and check for broken cylinder spider wheels with the center welds cracked or broken. Probably a third to a half of the machines I see have this problem and it allows the cylinder to actually flex while running causing broken cobs and grain damage as you have discribed. Deere does not seem to want to address this problem though.