Unscrew the single screw from the belt cover over the brush and remove the belt cover.

Remove the brush by lifting straight up on both sides and the belt can be removed at the same time.

Remove the belt from the motor shaft by sliding the belt off of the shaft and slipping it between the end of the shaft and the adjacent plastic post.

The cavity under the belt can apparently collect hair, dirt and debris so while we are in here, we can remove the nasty stuff and clean things up. I also remove hair from the brush as this is a common cause of brush problems.