Wanted to check my rear brake pads, so I decided to pull the caliper off, but they won;t budge. Moved the retainer away from the caliper, but its still hanging up on something. Must be a trick that I'm not aware of. Any ideas? Rotor gets very hot, and excess dust on lower side of rotor. Maybe froze piston, although, brakes seem to function ok.

 

Take a large C-clamp,etc. and see if you can push the piston in so the caliper will come off. Then get a hardware kit and replace everything so that it slides back and forth easily. Hope this helps.

 

take some fluid out to relieve pressure and rock caliper back and forth on the rotor. piston is probably seized