Combines Shoe loss on wheat

have you checked for wear on accelerator rollsIJ If they are wore out grain will fall through them and blow out in the upper air stream.

I was having trouble with beans last year so I had new rolls installed this winter.

are you talking grain coming out of the chaff spreader board - which would be the accelerator 'air blast', or being blown off the chaffer top. IF you turn the air down to 1 there will be no air on the chaffer and everything will come off in big wads and clumps as you harvest any volume at all. IF you turn it to 1 and you still have a large air blast, you have either splitter problems, the choke is stuck open and rotating on the rod or someone has reversed the lever on the choke and when you open it you are actually closing it. You have an air conrol problem, does it do this on both sides or just oneIJ

I'd check linkage to make sure choke is working properly. Also make sure that the airflow is not being restricted by the chaffer or sieve being closed too tight. When I set the shoe for wheat last week on a R55 I only closed the sieve one notch from corn and left the chaffer the same. I've always had the air set on 7 in corn, wheat, and beans. Shoe loss is very low and better than most other colors the neighbors run. If all this advice fails I'd call Agco service. There is a template available that will change the position of the splitter to change the ratio of air to rolls and shoe. The template is only about $10 and it takes about an hour to drill the holes and make the change. This affected some R52's and 62's in the late 90's. Good luck

You could pull oval covers under fan to check clearance of splitter to fan blade all the way across. I'd say you should find between 1 to 1 1_4" all the way across. Then also check cutoff at top of fan just behind choke. I think an even 5_8" clearance to blade would be close enough. let me know what you have and I'll check my numbers if still having problems. Have you made sure you don't have any major leaks underneath from feeder or under concave area where wheat could be getting sucked into fan. Are you driving fast enough to load engine close to rated loadIJ You should double check timing of accelerator rolls. Any chance this machine got small or light seeds kit at one timeIJ This would be perforated panels that could be closed across upper or lower air duct. Handles to adjust this would be ahead and below main drive clutch pulley. Good luck

I was able to get acceptable loss by putting a piece of plywood on top of the screen ahead of the fan. I know am running the wind board on 3. I am still getting some loss but not nearly as much as before. The CDF rotor is working perfectly almost zero loss off rotor. I was having problems last year on some light weight soybeans. That is why I had the rolls replaced. JUst seems like to much air off the rolls.