jack up car place on a axle stands remove wheel take off 2 rubber caps and unscrew retaining set screws with a 7mm allen key.
undo retaining springs tap off calliper and support
to allow room for new pads wind back piston using a pair of angled long nosed pliers
first of all unwind piston anti clockwise [must do this first] then wind piston fully in a clockwise direction
re fit calliper and pads in reverse
J E Curwen, January 2006