Removing brake pistons?
 

Hi,

Is there anyway I can remove the pistons without using the bikes hydraulic system or compressed air, as I have neither here with me?

cheers

Re: Caliper pistons
 

If there is a bit of the piston protruding you can pull it out but the most important thing is not to damage the piston surface in any way. So padding or cloth around the teeth of pliers is one technique which has been used (emphasis on taking it very slowly so as not to damage piston). Otherwise put the piston back on the bike (or any connected brake line that takes the banjo). Might be longer and more frustrating but you're unlikely to damage the pistons.

Edit: never tried it myself but don't see any reason why you couldn't attach caliper to the rear brake as the banjo should be the same size. This is assuming the calipers are for the front and that you can't use the hydraulic system because you've released the fluid from the system.

Re: Removing brake pistons?
 

Suggestion- two pieces of wood on the floor,place the split caliper with the piston in the space clear of the floor, and tap it with a rubber mallet so that the piston can vibrate free.
Simple but can be effective in many cases.

Re: Removing brake pistons?
 

Ok, went and got some brake fluid, used the hydraulics on the bike and only 1 piston came out? What nhow :(

Re: Removing brake pistons?
 

I have this exact same problem, just stripped the front brake, and all 4 pistons are stuck, can't use the hydraulics and I have no access to a compressor.
Any more advice? :L

Re: Removing brake pistons?
 

I've managed to get one out, but the other wont budge....I'm fooked

Re: Removing brake pistons?
 

If only one is moving put a g clamp on the one that's moving then the other piston should receive all the pressure and start to come out when you pump the brake lever

Re: Removing brake pistons?
 

No, you're not. Put the good piston back in and secure it in some way so that it wont move. This should provide more pressure for the one that is stuck. It only needs to move little by little. If you can see any residue or debris around the piston then clean it. i don't know if soaking it in brake fluid or WD40 or similar might help but it may be worth a shot. Then do the above and it should get it moving. Remember, if you don't get a strong lever then there's probably air in the system, so try and blled all the air out to get a stronger pressure. Your pistons would have to be ancient to be stuck beyond removal using the normal method.

Re: Removing brake pistons?
 

Tried that, cant gain pressure again :(

Re: Removing brake pistons?
 

I can't seem to get the air out :(