sticking brake piston

[perelaar]

I followed the excellent workshop downloads here to install new brake discs (old ones down to 19mm!) + pads.

So far so good, no real problems removing everything or reinstalling. But now one of the pistons is sticking, causing the brakes to bind.
Slider pins were relatively clean, but for good measure I cleaned them with fine sandpaper and reinstalled with copper slip. All sliders happily sliding now.

Any tips on how to free up that sticking piston? There is still some movement in there, as I had to push the pistons back in to install the new pads.

 

[solarman216]

yes just push them back with a cramp and pump the pedal to push them out again a few times should sort it, if only one of the pair is stiff then keep a cramp on the fee one to stop it moving out too far, Rick

 

[kitchenman]

same here

I look forward to a fix I have a similar problem

Oops Rick got there first