Using these vacuum cleaner motor carbon brushes is easy. First, make sure your vacuum is unplugged. Then, carefully remove the old brushes from the motor. Place the new brushes in the brushholder, making sure they fit snugly. Re - attach the brushholder to the motor. When using the vacuum, keep an eye on the performance. If you notice any strange noises or reduced suction, check the brushes. As for maintenance, it's a good idea to clean the brush area periodically to remove dust and debris. Don't use any harsh chemicals on the brushes. If the brushes seem worn out after a long time of use, it's time to replace them with a new pair.