Beans, Is the center belt slipping or is the hydraulic roller stallingIJ If your belt is slipping, I know that lagging is available for the rollers. Also, if you have a roller bearing going bad it can make the belt harder to pull and it can stall under load. Our header is the older 960 "Rice Special" model, so the center belt is mechanically run by a driveshaft. We've never had problems with it slipping. We did have the left hand (longer) draper slip a couple of times. Once because a wad of grass got inside the belt and jammed the outside roller, and once because a small chuck of wood caught up underneath the header and wedged the draper. I have heard that the hydraulically driven center belt doesn't have as much power as the pto driven belt we have, but I'm not sure. What happens with ours is the ant bed will normally fall off of the side drapers into the center cavity in front of the center belt. Some of it will get fed into the combine and some will get flipped out by the cleats on the belt. Hope you get it figured out.