Remove the securing spring and locating pins

Fig 1: Identifying Securing Spring And Locating Pins Removal

Courtesy of VOLVO CARS OF NORTH AMERICA.

Slacken off the brake hose (4) from the brake caliper half a turn.

Remove: 

• the securing spring (3) carefully so that it does not deform
• the protective caps (1) from the two locating pins (2)
• the locating pins, use a hex socket 7 mm.