I Ride My Bicicleta To Schoooool

[GTBrandon]

Plz help

Bought four brand new pistons, cleaned the calipers/seals, and put back together. After pumping the brakes, I still am only getting one piston to move. The pistons seemed like a really tight fit, so I’m thinking maybe they need to be sanded down a little bit?

Now I’ve gotta get these pistons out again to figure out what’s going on. No access to compressed air, what’s the best way to get them out if they’re snug in there?

did you clean out all the crud behind the seal?  

you will also want to lube the seals with some rubber-friendly grease, this will help the assembly.

I cleaned behind the seals as best as possible but there was still more that could be cleaned with a pick, so I’ll try and do that.

I lubed the seals with brake fluid, should I be using something else on top of that?