This chain assembly drives the slatted conveyor that carries material from the threshing mechanism to the subsequent processing stages in the combine. It engages with the drive sprockets on the conveyor shaft and the idler sprockets at the opposite end of the housing. Wear in the chain pins and rollers causes elongation, which leads to slat misalignment and reduced conveying efficiency. The manufacturer machines the pins and rollers to match the original pitch and clearance, so the chain seats correctly on the sprockets without skipping. On installation, verify the chain tension is within the specified range and that all slats are oriented correctly for the direction of travel.