This is high quality replacement carbon brush for Lamb Electric Vacuum Motor Replaces Part Numbers: 2311480, 333261, 33326-1 Replacing brushes can fix an intermittent motor. brushes can restore a motor's electric . The carbon brush is retractable. Carbon motor brushes are one of the most components for power tool. Please remember when you are installing them to make sure the carbon brushes go in completely and stay straight. It is normal to need to hold them in until the connector is re-secured.