Using this Fisher & Paykel DD90S Series DishDrawer Dishwasher Motor Rotor is straightforward. First, make sure your dishwasher is turned off and unplugged. Then, carefully remove the old motor rotor and replace it with this new one. It's designed to fit easily, so you shouldn't have any trouble. As for precautions, always keep food and glass particles out of the dishwasher as much as possible. These can damage the impellor on the motor rotor. For maintenance, occasionally check the impellor for any signs of wear or damage. If you notice any issues, contact us right away. With proper use and care, this motor rotor will keep your dishwasher running smoothly for a long time.