any time i've had that happen i put in a new pump and it fixed it. mine has done that twice since 2005.
On Mon, Nov 11, 2013 at 2:58 PM, AndreyPhl <[email protected]> wrote: > I am on my first pump and OPV, 4-5 year old Brewtus II and have a similar > problem. In my case I can pull the first shot of the day just fine, > 30-35secs full 10-11 PSI depending on the tamp just fine. However, 2nd shot > and the pressure falls to 6psi within the first 10 seconds and the pump > gets abnormally quiet. The shot continues though at this lower pressure. I > have no problem backflushing though - with the blind basket I get full > 10-11psi pressure and don't see it drop although I don't typically stress > the pump and hold it quite as long. Any recommendations? Pump? OPV? Thanks. > > > On Wednesday, June 19, 2013 9:34:22 AM UTC-4, whatwud zombeesdu wrote: >> >> Did you ever get this resolved? >> >> You are not the first person to experience this problem. I have had the >> same problem with my Brewtus 1. >> >> On Friday, March 29, 2013 7:51:44 PM UTC-4, billherbst wrote: >> >>> 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. > For more options, visit https://groups.google.com/groups/opt_out. > -- 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. For more options, visit https://groups.google.com/groups/opt_out.
