Central Vacuums Power Unit Parts EurekaVacuum Store has the parts you need for your older Eureka Central Vacuum Systems. All Central Vacuum Unit schematics are numbered according to the manufactures current part numbers. In order to ensure your unit remains in good working condition, you must use eureka genuine replacement parts only. eureka genuine replacement parts are specially designed for each unit and are manufactured to comply with all the applicable certification standards and maintain a high standard of safety. Installing the components is equally important. Most PC Boards and Central Vacuum Motors do come with wiring diagrams as well as a limited instructions for installing the components. Be careful not to disconnect any wires before having the replacement part ready to install. Call Vacuum Store for any questions.