Using this roller and shaft kit is easy. First, make sure your fridge is unplugged for safety. Then, remove the old roller and shaft from the rear of the fridge. Take the new roller and shaft from the kit and carefully fit them in place. Make sure they are firmly attached. As for maintenance, it's a good idea to check the roller and shaft every few months to ensure they are in good condition. If you notice any signs of wear or damage, you may need to replace them. When transporting your fridge, be extra careful to avoid any impacts that could damage the roller and shaft. And remember, if you're not sure whether this kit is right for your fridge, don't hesitate to contact us with your model number.