This chain drives the inclined conveyor that moves crop material from the header into the threshing mechanism. It transmits torque from the drive sprocket to the upper drum, maintaining the required speed ratio for consistent material flow. A worn or stretched chain causes slip and uneven feeding, which reduces throughput and increases the risk of plugging. The chain is constructed with roller links and side plates that match the original pitch and tensile rating, so it seats correctly on the sprockets without requiring additional tensioner adjustment. On installation, verify the chain is aligned with both sprockets and adjust the tensioner to the specified slack.