Stuck piston removal

[acealfa]

Hi all,

I started stripping down a pair of old calipers but I’m faced with a stuck piston that won’t budge no matter what I try. Usually they come out with a couple of pry bars under the lips but this one is jammed solid & they just slip eventually. Does anyone have at tips or tools to remove it? I’ll be forever grateful 😅

[acealfa]

I was looking at this but doesn’t show instructions but looks similar principle

https://www.24mx.co.uk/motocross-accessories/tools...

[acealfa]

A bit awkward with them being 4 pots but I guess I could just take the half & put the other piston back in then clamp it in the vice.

Thanks for the ideas

[acealfa]

Air pressure didn’t move it so next step grease gun but cartridge is empty so need to order one. These are spare calipers so unfortunately don’t have the car to use.

[acealfa]

That is a very clever idea. I will try it

[acealfa]

All good suggestions and handy for the future. I’ve managed to get it out finally. Had to clamp the other piston then use a grease gun. Here are a couple of pictures. I wonder how long it’s been seized.