caffeineus_impervious
A year after Caffeineus_Impervious had this issue, my Vesuvius is behaving similarly. Quoting CafImp:
The problem is as follows:
No water is coming out of the shower screen.
The pump works and is building pressure.
When the machine is cold (and powered on) no water is coming out of the shower screen.
The only way to get water out of the head is to open the top nut and relieve some of the pressure in the group head (risky, but I’m a gangster). This will allow me to pull one shot, then the problem returns.
A few things are different in terms of machine condition: built in 01/2015 ser # C00019, the top cam pin looks rather worn, AND WHEN it does dispense properly the cam lever will move outward toward water spigot about 2mm mid-shot pull. This cam lever movement usually means the flow will stop for the next shot so I have to loosen the top nut/bolt to get the flow to release.
Since CaffImp posted then ghosted this thread, it seems there was not a solution that worked other than the temporary adjusting of the cam extension on the top valve pin. When the machine cools down I will try this. It’s a bummer to not see the fix after DavecUK and many others tried to help… but CaffImp’s machine was new and mine is old, so I will fix it hopefully with guidance from y’all and Paolo.
My group guts were scaley so I disassembled, cleaned and reassembled thinking a clog of scale at a jet or somewhere was the culprit. No joy. Still have to release pressure at top nut/bolt to get flow at dispersion screen.
Will try Kanen Espresso in Berkeley for this top valve pin available pronto. I emailed Paolo and await response.
Want pics?
The square edge that touches the cam is not square but chamfered, is this worn out?
Sorry my iphone camera is dodgy and doesn’t want to focus.
Also, isn’t there supposed to be a small spring at bottom of group vent? Where’d that go?
