For maintenance purposes, if you happen to notice that your Aquabot cleaner is not moving, check the drive belts for wear and tear on the drive system. If you notice any worn out parts on the drive belts, you may purchase a replacement part such as this particular product, the Aqua 3302 Aquabot Turbo Swimming Pool Cleaner Drive Belts 2-Pack, which is replacement part for the drive belt and this comes in a pair of two.