Combines Buildup around the rotor cage

What model combineIJ If this buildup is occuring on the backside of the rotor cage, you need to correct the problem or risk a fire because of the rotating drive shaft in that area. Material will pack around the shaft. There are some things you can do depending on what model machine you have.

I know we are in different areas and crops and conditions, but my 1680 would constantly plug the cage above the grates too in grass. I tryed faster and slower rotor, tighter and looser concaves, faster and slower vanes, etc., etc. Nothing worked. I finally figured out after doing a quick kill once that I was'nt pushing enough material in. So, I went faster. I pulled the rotor down another 20 rpm from what i was doing, and it stopped plugging.

1680 standard rotor

Disrupters will cause the buildup to increase more than normal.

no disruptors, maize bars on the rear of the rotor

The rubber paddle flap on the lH bed auger should be positioned 90 degrees to the auger shaft and at least 4-5" away from the end of the auger flighting. The flap throws a small amount of grain up between the side of the combine and rotor cage to eliminate any material build up.

I will check that. Thanks

I'm sure of the cause or a solution, but I thought I'd take this opportunity to point out that a rotating cage _ concave like we had on the XBR2 Bi-Rotor combine would not have this problem of material building up on the top side. It was constantly turning at low speeds 50 to 100 RPM and there always cleaned off. Hope we get to see this technology on the market someday. I think it is Rostelmasch in E Germany that has introduced the counter rotating concave on the market, similar to the early bi-rotor test units. That patent was eventually abandoned in favor of the more effective co-rotation in the same direction as the internal rotor.