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