This elevator sprocket drives the chain that moves crop material through the feeder house and into the threshing mechanism. It mounts on the left side of the feeder-house shaft and engages with the elevator chain, which carries material from the header to the processor. A worn sprocket causes chain skip, uneven feeding, and increased vibration in the feeder assembly. The manufacturer machines this sprocket to match the original tooth profile and pitch diameter, so the chain seats correctly without accelerated wear. On installation, verify that the chain tension is set to the specification for the assembly and that the sprocket is aligned with the chain path.