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Have a 2188 with AFX rotor, all OEM rasp bars. Heard there was a new recommendation involving the front of the rotor somehow when using the AFX rotor in a 21xx series combine, anyone heard of that? Also curious if anyone uses small wire concave in the front and two large wire in the rear for wheat or what works for you? We use a 1020 30' head and loose wheat out the back worse than 9510 and 9610 we combine with. I must be set up wrong. ANy help is appreciated.
 

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On our old 2188 we used 2 small wire concaves and one skip wire for wheat. It had the key stock grates in the back. It was a specialty rotor with no straight bars. We had the regular corn sieves in it. We also ran a 30ft 1020. here is the settings I used to use......

Rotor..........................1050-1100
Concaves....................3-3.5
Fan..............................1050-1100
Front Top sieve...........closed
Middle Top sieve.........2 1/2
Back Top sieve............3
Bottom sieve...............no less than 3

These were the numbers on the adj handles. Don't cut your bottom sieve down or you will cut off your air. You want to do your separation with your top sieve not your bottom one. As the wheat gets dry I would open the concaves and slow the rotor down. I hope this helps.
 

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We have an AFX in a 2188 and our settings are a little different. Our wheat and durum are hard to thresh so we run the concave tighter - any where from .5 to no more than 1.5. Rotor is usually wide open. Top sieve I can't recall right now, but I believe it is what the manual recommends. Bottom sieve is open only enough to let the clean grain through and the white caps go up the returns. Usually end up plugging the return a few times and open up the bottom sieve a little till that goes away.

I've tried a hundred times to run the book settings, but the only thing I can figure out is that all wheats are different. Book settings = ugly sample.

Oh and we run 3 small wire factory concaves. Lots of people tell us we should run aftermarket like a Howard. They say that white caps go away.
 

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Could you be thinking of the rotor flight extention kit? It is a weld on extention setup that basically removes a couple rasp bars and small extentions of the impleller flights are welded into place. This helps reduce the pinching and stalling effect where the flights end and the concaves begin. That is a small spot where too much has to happen at once. Not sure if thats what you heard about, but.........
 

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determine if wheat loss out the back is rotor loss or if it is loss from the sieves
if it is from the rotor you might have to put in a set of straight bars or a set of spike rasp bars over the first grate to allow for better seperation, maybe even slow the vanes down over the grates to allow a longer seperation time
3 small wire concaves work the best for wheat
 
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