Combines R50 corn loss any suggestionsIJ

Agri,

I run 3_4 in. cyl. and 350 cyl speed most of the time if I go below 320 rpm it uses more power. It may pay to try running witout the seive (we do it when running in snow). Run a standard chaffer or try it with your airfoil. I know of a 7720 runinng with a airfoil and no seive all of the time. I learned this trick on a F Gleaner it incereaced capicity by about 25% on that machine.

We are also experiencing excessive rotor loss and I am not sure what to do about it either. We are combining 180 bu corn. I have tried everyhing I can think of on our R72. It is fully hyperized. I have installed the new style high wire seperater grate. Have the half hieght bars, reverse bar mounted in the seperator grate. I am contemplating putting in some reverse bars on the rotor to see if that will help. I have tried the rotor speed from 250 to 350 and that doesn't seem to make any difference. Concave from 8 to 12 on the scale. I get the best results at 350 and the concave set at 10, but it still isn't as good as it should be.

Shocks on rear feed have always been the most important in my view unless you are locking the drum up for your corn. Be sure the feed chains are tightened up to specs. so they are not boeing upward halfway between the tention drum and drive sprockets. If chain is bulging up to high it will lose control of crop and then slug feed the cylinder. It becomes important that all sections of chain are pulled up tight. If the left chain has streched out more than the others it could be loseing control of the crop. Are you sure you should be removing every other wire or more from the high wide wire concavesIJ You may not have enough wire to support crop thus breaking cob more and allowing to much to go down to shoe. Do you have wide spaced every other hi-low bar in the third row from gearbox and or any bars extended into dischargeIJ If you try reverse bars why don't you install just one in position two from gearbox and one more in position three. It seems like more than two or more reverse bars in any one position will hold up crop enough to grind things up and take power. I too believe you will need a corn chaffer to handle all that corn with the 8 row head. We have also run without sieve installed for corn.

I have 4 wide high tooth bars in the third row and 4 narrow low tooth bars. I don't have any bars extended into the discharge, but I have a couple of the helicals extended into the discharge. I'll try putting my wheat chaffer in tomorrow and see if it makes a difference. Thanks for the help.

Thanks for the advice. I'm going to try my wheat chaffer tomorrow and see what difference it makes. With corn prices where they are and my limited acreage, I'm trying to hold all my expenses down. What is the difference and reason for needing a corn chaffer vs. std. chafferIJ

Fellow Harvest'er,