WB Callipers

[damienengland]

Hi all. Looking for some help with rear calipers. I have the 'Girlock alloy (WB Collette)' rear disc brakes and tried to replaced pads yesterday. Couldn't get the piston to retract so gave up and put them back together. After Googling around, it looks like the pistons rotate to retract not push? Can anyone advise on this? Any tooling or technique required?

[george]

you can buy a special tool to rotate and retract the brake cylinders or like some do long nose pliers and a screw driver for leverage.