How to dissasemble rear master cylinder??

[250r rider 88]

Im trying to dis. my rear master cylinde to powder coat. we removed the snap ring and the main rod came loose but there is still like a little cup or a seal in front of the springs and piston in there that the rod pushes up? how do i get the rest of it out?

thanks

[86 Quad R]

you could either try a lil bit of penetrating oil to try en free it up by repeatedly pushing on the piston till it pops out or allow to set and then shoot LOW air pressure to it.

[250r rider 88]

thanks that worker appreciate the help