but i have tried pumping the piston out, it doesnt work.. ive jammed the other piston and then i press the pedal it just makes clicking noises from the brake pedal... its not pushing the piston out.

You need to shock the piston first by rotating it, if its stuck it isnt going to budge, hence why i said shock/rotate it re bleed and watch it come out.

yeah i will shock it and try to rotate it and see if it will make any difference

Sorry guy's but I can't see how you are going to rotate it if brake pressure won't move it.

Personally, I'd reassemble with the old seals after cleaning the seal recess, then bleed & try again with hydraulic pressure.

Pip

like i said.. it doesnt work, ive tried it plenty of times, the brake pedal makes clicking noises and it doesnt "push" anymore. i dont know how to explain it any clearer... it just doesnt work

xivlia wrote:like i said.. it doesnt work, ive tried it plenty of times, the brake pedal makes clicking noises and it doesnt "push" anymore. i dont know how to explain it any clearer... it just doesnt work

It should work unless your m/c is fukced or the system has air in it. It is THE most effective way of removing the pistons. Funny that as thats how the brakes work!

Why not try pushing the piston in further to break the "seal"?

If the seals have glued themselves to the piston, pushing the piston in is a good as rotating or pushing it out. You can use a G clamp or a vice and a sleeve.

Then, bleed the brake and use the pedal to pump it out.

Damn he beat me to it, but try pressing it back in with a g-clamp or something, but if it thats siezed i'd prob be looking at getting another decent one, maybe asking the really nice guys on here?
Cheers
Ian

okay, i will try the g clamp method right now and see how it goes.