Hello, I hope the following assists you.
The nearside piston will retract by turning anticlockwise, the offside retracts by turning it clockwise. The only exception to this is the 460 series where both pistons retract anticlockwise.
Let me know if I can assist further.
Your advice seems to be working, thanks for helping us out.
I am now having problems bleeding the brakes, is there a special way of doing it? I have pumped them and held the pedal down, which has always worked in the past, but not this time - any further help is appreciated.
if the vehicle has stability assist then the recommended way to bleed the brakes is using Ford IDS which uses the ABS pump to push air out of the system. This said I've always bled the system as normal starting at the caliper furthest away from the master cylinder and finishing at the left front caliper.
If you have an assistant then try locking the bleed screw off every time after the brake pedal is pushed down this way no air can get back past the bleed screw threads.
I hope this helps.