yowser wrote:Not being handy I think it will be quite a job to pull the upper piece of the sleeve out of the group head. Any creative suggestion welcome.
Sorry, never did that myself and I'm not coming up with a brilliant idea. Anything that might jam tight inside the cylinder with a handle sticking out that you can get a wrench on, then unscrew counter-clockwise. You may be able to carefully nip some notches in what's left of the bottom to give you something you can drive against with a punch. If it's brittle enough you may be able to nip and chisel it to pieces from the bottom, but if you do that be really careful not to damage the brass that it threads into.
yowser wrote:There was a mention of sort of an adapter to smooth out the penetration of the piston into the sleeve, I never managed to find it from any of the stores, does anyone know where I can find this gadget?
Something like this? DIY-Olympia Cremina piston rod seal "tool" and Fix
I have never found it necessary on the Pavoni, especially not on the millennium where the bottom of the cylinder is a soft plastic edge. Just take your time and use your fingers or a wood chopstick to tuck the lip of the lower
upper gasket inside the cylinder as you gently push on the bottom of the piston.