does anyone know how to get the rear brake piston to push back to replace the brake pads

 

You have to loosen the outer lock nut and back the adjuster screw out to be able to collapse the piston to be able to replace the pads. When new pads are installed,then you hold the brake pedal down and turn the outer bolt in until the brake pedal raises up to about 1/2" off the floor board when firm. You may have to do this a time or two as it's breaking in the pads. OPT