Combines 8780 wheat threshing incomplete

tj

Guest
When you have the least amount of rotor loss, are you also finding badly broken up short straws on the shoe and are some straws hairpinning beside the wires in the separator gratesIJ
 

jerry

Guest
Yes. There seems to be some straw between the rotor and the concave.
 

tj

Guest
As you mentioned, your concaves are likely worn badly enough that they won't retard the flow of material properly. If you're finding straw lying between the concave crossbars, the rotor bar teeth are probably losing their leading edge and teeth are rounding over so they won't carry MOG. To try to help you through, I'd suggest that you rezero your concaves. likely, they're presently set tightest on the bottom and widen out as the rotor turns toward the R_H side (from the seat looking forward). Try to rezero your concaves to where the tightest point is about 1_8" away from the rotor(or maybe a little tighter) at about the seven o'clock position looking back from the front, and set the bottom at about 1_4" away from the rotor. What this does is to provide a more constant wedging action against the crop even when you open the concaves wider for feeding, and extends the area in which the crop is retarded. Only drawback you might see, but not likely, is a little more loading on the R_H side of the shoe. Also, operate the rotor as slowly as possible for your particular ground speed in order to load the threshing area (crop on MOG thresh). Hope this is all understandable.
 

jerry

Guest
Thanks. We are done the wheat for this year although it was not a great crop. We plan on new rasp bars and putting a bead of weld on the rounded concaves. Always good to get suggestions for the future.
 

tj

Guest
If you weld a bead on the concaves -- make sure that you can grind to a square corner and that the buildup is as smooth as you can get it.
 
 
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