This drive chain transmits power from the gearbox output to the cross-auger in the grain tank of the parent combine. It engages with the sprockets on the auger shaft and the gearbox output, converting rotational motion into the auger’s sweeping action that moves grain toward the unloading system. A worn or stretched chain slips on the sprockets, causing erratic auger speed and incomplete tank emptying. The manufacturer machines the chain to the same pitch and roller geometry as the original assembly, so it seats correctly on the existing sprockets without requiring shimming or sprocket replacement. On installation, check the tension and align the sprockets to prevent premature wear.