How to remove and refit pistons from shimano saint m820 calipers with out separating

In this video I show you how to remove and refit shimano caliper pistons with out separating the caliper body.
caliper shown is M820 saint!
What you’ll need
1. Cheap syringe ( filled with water )
2. Tube for syringe to bleed nipple
3. Cut bleed block
3 something thin & flat to refit Piston
Note: don’t forget to fully flush caliper with brake fluid to clear water. Failure to do so could cause some serious problems

[@7LaEDt7]

and how you bleeding it that you got again perfect Breaking power? My piston Fell out and now After the bleeding process the break is spongy and not good

[@atiboa]

Great video. I'm searching a solution to take out the piston from my old LX hydraulic caliper. But since it's a 2 pot system, the "cut-out spacer" won't work for me. Anyways, it was helpful, maybe i'll need this knowledge for maintaining my other bikes. Cheers!

[@mihaichiriac480]

On my old deore 2 pot i connected the intake of the caliper to a floor pump with tat baloon adapterand pushed air until the pistons started moving. After that I imobilised one piston with a tire lever and started pumping air again

[@dandyer8351]

Very helpfull vid made it look easy.

[@chrisrae1254]

Great vid you can use zip ties also to tie around the pistons to remove one. This works better but. I’ve got a new caliper leak so will be doing this again this week 😢

[@slugzkea]

Did you fix your caliper leak?

[@nickyates4108]

Cheers pal. Saved me about £90 buying a new one. All it was, was a bit of grit behind one of the pistons.
Good as new now.

[@mickp10]

Thanks for the great tutorial.