Using this Simpson gearbox assembly is easy. First, make sure your washing machine is unplugged from the power source. Then, carefully remove the old gearbox and replace it with this new one, following the instructions in your washing machine's manual. When it comes to things to watch out for, always double - check that the model and PNC number of your machine match the compatibility list. If you're not certain, it's best to reach out to us. For maintenance, keep the gearbox clean and free from dirt and debris. Regularly check the brake band for signs of wear and tear. If you notice any problems, like strange noises or reduced performance, stop using the washing machine and contact us for further assistance.