BC108

You can use a G clamp to squeeze the piston back in, but you have to turn it as well. There is a screw section that acts as the self adjuster and it needs winding back in. I used a large G clamp and pipe grips to turn the pad pressure plate. Tighten clamp, about 1/4 turn on grips then retighten clamp, turn again etc. I assume it is the same as my Galaxy. It is best to attach brake bleed kit to the caliper and let the excess fluid drain out. It stops small particles making their way to the ABS and causing problems. This should be done when changing front pads as well.