Using your CleanTech Backpack Vacuum Motor Fan Unit is easy. First, make sure your vacuum is unplugged before installing the motor. If you're using it with a Pullman AS3, you might need to adjust the rear rubber mounting block. Once installed, plug in your vacuum and switch it on. It's that simple! When using the vacuum, avoid overloading it. Also, keep it away from water and other liquids. For maintenance, regularly check the motor for any signs of wear or damage. You can clean the fan blades gently with a soft brush to keep the motor running smoothly. If you have any issues, don't hesitate to contact our customer service team.