The rear brake slave cylinder on my Suzuki GS 850 has seized on one side, the two sections are apart and one piston is out but the other one is seized solid. I have soaked it in WD40 overnight and held the end of the piston in the vice and tried to move the caliper but to no avail. Can anyone help with suggestions?? Thanks guys
You need a tool, check eBay for the pliers or expanding piston removal tool, sometime compressed air works, a little heat helps too as it softens the seals, I rebuild them all the time and have both tools, the tool makes it easy! This is an example, many types around... Brake Caliper Piston Removal Tool | eBay
If it's really siezed solid then a good way to get it out is with hydraulic pressure, clean & rebuild the one you have removed then re assemble the caliper & bleed it, when that's done push the good piston in and lock it there with a G clamp or similar then pump the pedal and the piston will move. It's a bit time consuming but does work. For future reference never remove/strip a caliper without 1st getting the pistons as far out as possible using the brake lever.
But before you try all that put the piston back in your vice & heat the caliper body before you try turning it.
Thank for the advice guys Ill work through the easiest option first, a bit of heat. Those tools look like a good investment if I can't get it out without. I couldn't use its own hydraulics before because the bike came out of a barn after 6 years everything was seized
Buy the tool, its easy then, I have my own home made ver.. I do prob 25+ calipers a year.. I've done FAR worse than this
