This gear drives the metering mechanism that controls grain flow from the tank to the elevator. It is mounted at the discharge point of the grain tank and meshes with the mating gear on the metering roller. A worn or broken gear causes irregular grain delivery, leading to uneven filling of the elevator paddles and potential blockages in the downstream auger. The manufacturer machines the teeth to the original profile so the gear engages without backlash or binding. On replacement, verify the keyway alignment and that the retaining hardware is torqued to specification.