Feeder house chain slip clutch slips. Seems there is soybean plugging due to refeeding. New A&I concave and rasp bars 150 acres ago. Soybean stalks are dry. Stone trap is packed full everytime a plug occurs which can be every 500 to 1000 feet. All fingers in the 215 flexhead auger and poly lined bottom. Feeder chain is tightened to spec, bottom drum set to lowest position and free to float. Feeder house bottom is smooth to the top. Beans are clean in the tank and no unthreshed pods and no cracked ones. Cylinder speed 500-550 rpm. Beater turning and has a new belt. Only thing I noticed tonight was the concave setting was in the corn range. Since changing the concave and freeing things up, the concave seems to open a bit by itself. Could this cause refeeding?......Ron