Equipment doesn't work? Troubleshooting? If you're handy, members can help.
My cremina is a 1983 and also develops vacuum when lifting the handle with my hand covering the group head.Note(!) This model year ('77) does not have the magical four holes that later years have. I wonder whether this means my pucks are in more danger than with the "holy" models. One thing that concerns me in this regard -- with the lever down, with my hand covering the group-head opening, when I pull the lever up I can feel a vacuum on my hand. I can't imagine that's good for a puck. Could any of you folks with holes in your pistons tell me whether this experiment yields a vacuum.