You should start with removing the disc
Brake Caliper, hanging it down to provide space. Now, remove any clips bonding the brake disc to the wheel mounting studs and lift the rotation straight off the hub as well. For the rear brake disc, proceed as before by removing the caliper from the hub and suspending it, removing any clips and simply pulling the disc straight off. First, put the front brake disc over the wheel mounting studs attached to the hub. After that, fit back the disc brake caliper and the brake shoes. Go over the brakes by pressing the pedal several times and adjust the brake fluid level each time it is needed. Position the rear brake disc on the hub over the studs, reinstall the caliper and shoes, adjust the back brake shoes as you see fit, pump the brake pedal a few times to make sure it's firm and top up the brake fluid if needed.