Start by loosening the wheel lug nuts and raising the vehicle to remove, if necessary, inspect your brake discs and put them back. Stabilize the disc on top of hub flange using lug nuts after removing the wheel. If working on rear disc, release parking brakes. Take off a
Brake Caliper without disconnecting a hose pipe for that braking system and use wire to suspend it safely. Visually check the surface of the brake rotors for scored marks or damage-deep scoring will require the rotor to be removed and refinished by a machine shop. In addition, examine both sides of a rotor and assess its runout using dial indicator. If the runout exceeds specified limits one may need machining. Even when indicator reading is within limits it is still recommended to surface discs again in order to get smooth finishing. If there's no resurfacing involved, then with circular movement rub emery cloth or sandpaper against glazed surfaces until it's gone or try remachining them. Use a micrometer to measure thickness of rotor making sure that it remains above minimum thickness usually cast or stamped into it (rotor). To have this detached, remove relevant bolts unscrewing caliper support bracket after which slide out disk from hub applying bolts where necessary.There are two types: solid one-piece (non-vented) and vented (two-piece). Inspect parking brakes shoes for rear disks.Most important step here is thoroughly cleaning all parts plus installation of disk, calipers support brackets, brake pads themselves as well as tightening required bolts.Finally install your wheels back, lower your vehicle down and tighten lug nuts.Press down pedal so that pads can touch rotor then test braking system before driving away, however if you disconnected your brakeline bleeding is desired.Notes coould be made only in case hose has been disconnected because of necessity to bleed it.