Chapter 3: inspection, adjustment, and lubrication
Removing a wheel with a disc brake does not require opening the brake. Follow the instructions for wheel removal and installation of a quick-release wheel and simply slide the disc out of the brake.
When installing the wheel, carefully guide the disc between the brake pads. If the edge of the disc is pressed against the pads with force, the pads could be chipped or damaged, which then requires replacement of the brake pads.