Should be an easy answer:
I am having difficulity pressing the piston into the rear caliper of the Mazda in order to install the new pads. I have done this 100's of times on other cars but never had a car with the hand brake connected to the rear caliper. Is there some trick? I cannot press the piston into the caliper more than 1/4 in using the C clamp.
One recommendation was to open the bleeder valve to release the pressure but I have never done this on other cars.
Any recommendations?