Given my history with this Brewtus, you might be right. This would be my fourth OPV in four years. Last time, I bought two, just so I'd have a backup the next time the OPV went loopy.
I left out a couple of potentially significant facts in my first post. One is that I changed grinders three days ago. My Baratza Vario had been slipping on the coarse setting during grinds by one notch (in spite of having the shim kit installed), so I finally swapped it out for my backup grinder, an Ascaso i-Mini, which I've been gradually getting dialed in. The first couple pulls were way too coarse, then one yesterday was way too fine and choked the machine. Maybe the OPV had a stroke. The other fact is that two nights ago I backflushed the Brewtus for the first time in almost a year. I just backflushed again about an hour ago, and the pump does the same thing as when pulling a shot---preinfuses, then goes to 9 bars and chokes, with that same decrease in pump noise. The only difference is that the pressure doesn't fall from 9 to 2-3, since there's nowhere for the pressure to go with a blind basket. I don't let it run that way for more than a second before closing the pull lever. So, I'm thinking what's going on might be different than I assumed. Perhaps the pump is OK, in which case, as you say, the OPV might have bought it when I backflushed four times times two nights ago. I'll keep troubleshooting for a day or two before I swap out the pump-OPV assembly. Thanks for responding. -- You received this message because you are subscribed to the Google Groups "Brewtus" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/brewtus?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
