make sure hand brake off,undo( piston part of caliper )securing bolts lift caliper,use special tool to push piston back as it twists piston at same time or you can use a large screwdriver and push and twist piston clockwise.Fit pads and refit caliper.pump up brake pedal (shallow pushes so as not to damage master cylinder), then check handbrake travel.
marcus the mechanic
January 2008