1981 Other Chevrolet Models Front whell breaks and Bearings

My chevy is a Class C Moter home. I have seen it referred to as a Light Truck under carriage, and sometimes referred to as a Sports Van.
My problem is the front wheels lockup. I removed the right front wheel and the rotors show wear (groves).
I am not sure how to release the pads or remove the rotor to replace it. I would also like to inspect the bearings and repack them. Can anyone direct me to some online sources for information.
Thanks
Joe