Using these Qualtex vacuum cleaner motor carbon brushes is easy. First, make sure your vacuum cleaner is turned off and unplugged. Then, find the old brushes and carefully remove them. Place the new brushes in the same position, ensuring they fit well. When installing, check the spade terminal connection. As for maintenance, it's a good idea to inspect the brushes regularly for wear. If they look worn out, replace them promptly. Also, keep the area around the brushes clean to ensure good performance. Remember, while these brushes are suitable for many Qualtex motors and some generic ones, always double - check the compatibility before installation.