The gear drive (large) is a replacement part that was made by Hayward. The same high-quality materials were used to manufacture the original factory part making this a genuine OEM product.
This gear was made to connect to the steering bracket roller and apply the rotating power that comes from the small gear drive and turbine, to the wheels. Giving the cleaner the power to maneuver along the surface of the pool. It sits on the right side of the lower body and then connects to a shaft bearing allowing the steering bracket to rotate with ease.
This part is white and very similar to the small drive gears, yet it is a tad bit larger than the two. Also, we recommend checking these gears periodically as the teeth will wear over the extended length of time and use of the cleaner.