truemagellen wrote:LSM group was built for quick piston seals replacement without shutting down the machine. That way service can take place during the cafe work day without major downtime and even in a busy cafe on multi group machines.

Perhaps the updated ACS version is easier from the top?

And for those who wonder how this is possible there is a valve at back of group controlling the water inflow and not the piston seals acting as a valve.

DaveC wrote:The Evo group can be done from the bottom as well...

Lets see if this will upload...it's something I did for the Evo, but it shows the two types of groups and how they work. I made a .gif animation but they don't play on HB, so I converted it to a video.

video