Water currently diverts to the drip tray when pressure setting is overwhelmed. I had a bad pump once, no water went anywhere until it slowly dripped through the puck.
I can check the pump but its not fun to get at. I believe pump is woking great. Why would pump cause pressure release early? Eric On Wednesday, April 11, 2018 at 8:29:10 AM UTC-7, bmacpiper wrote: > Hey Eric, > Any chance your pump is failing instead? Before I converted to rotary, I > had similar symptoms each time a vibe pump failed, if memory serves. You > could search (really) old threads from me when this was happening. But if I > recall correctly, the pump would sometimes develop pressure, sometimes not, > and it was maddening until I sorted it out. Similar to what you describe in > the OPV, the sides of the piston in the vibe pump looked totally fine, but > they were worn and binding up, etc. I do think the OPV should be relatively > smooth, but doubt it’s the issue, especially with a new one in there. Scale > could indeed cause any moving part to bind, but a new OPV has no scale on > it of course. You could also have chunks of scale that have broken off and > are fouling the pump intermittently. It’s pretty easy to disassemble the > pump to check for this. > > As to why it would develop highest pressure at the midpoint; just taking a > SWAG, but I wonder if that setting is giving just the right amount of back > pressure to a failing pump and letting it work most effectively? > > I’d try a known good pump, if possible. You may end up down the rabbit > hole, though, because you might see scale in the end of water tubing, and > get a case of the “while I’m here”s... > > Best and let us know, > bmc > > On Apr 11, 2018, at 08:19, Eric Christoffersen <[email protected] > <javascript:>> wrote: > > Hey Guys, > > I got about 9 days of bliss from this new unit, now it won't maintain > pressure, and problem is getting worse. > > I managed to open up the old unit and it works exactly how I expected, the > screw presses the top of a strong spring which presses a hexagonal plunger > with a rubber pad on its end. When pressure in main line is exceeded then > pad lifts to release water. The metal at the end of the plunger feels > gritty, is not smooth. Not scaly though, looked pretty clean. The metal > inside is rough so makes it sticky and together with tolerances the unit is > a little difficult to reassemble. Could it be there's too much friction? > Maybe I sand it smooth? > > Some things to note: > > - No water into drip tray until pressure reaches an indicated 4 bar. The > thing does hold some pressure. > - The screw control does sort of control the brew pressure, if I back it > way off the brew pressure doesn't exceed (indicated) 4 bar or so, if I > tighten it all the way down I get 6-7 bar. If I leave it 3/4 screwed in I > get 7-8 bar. Yes I get most brew pressure with spring not fully in. I get > the same brew pressures when brewing coffee and with blind portafilter. > > Has anyone experienced this? Doesn't seem right that two parts that look > fine are both 'defective' in the same way so I'm looking for another > explanation. > > I have an accurate bike tire gauge - was sort of thinking to connect it to > a bike pump and see if I can't read the pressure, but that'd be air not > water. > > Dave: You mention scale, have you experienced this issue? Do you know how > scale causes this? Its been 3-4 years since I descaled so likely there are > some large encrustations in the boilers. I'm just not seeing how scale is > causing this. > > > > On Saturday, March 24, 2018 at 4:10:26 PM UTC-7, Dave B wrote: > >> THAT is caused by SCALE >> >> On Fri, Mar 23, 2018 at 5:28 AM, herman dickens <[email protected]> >> wrote: >> >>> It sounds like you fixed it. >>> >>> On Fri, Mar 23, 2018 at 2:06 AM, Eric Christoffersen <[email protected]> >>> wrote: >>> >>>> Got another one form wll. While waiting the brew pressure dropped to >>>> indicated 4 bar, water just pouring into drip tray. >>>> >>>> Installed the new unit and it also brewed with lower pressure, screwed >>>> it down all the way and got 8 bar. Over the next 4 days brew pressure rose >>>> until 12+ bar. I backed the screw back and now pressure is stable at 9bar. >>>> >>>> Wonder if this is caused by air? I sort of remember something similar >>>> when I replaced before. >>>> >>>> Anyway, all set no. >>>> >>>> I'd open the old one but my harbor freight snap ring pliers were >>>> destroyed in the attempt. >>>> >>>> On Thursday, February 1, 2018 at 2:55:07 PM UTC-8, Eric Christoffersen >>>> wrote: >>>> >>>>> >>>>> My Brewtus2 has a hole behind the drip tray to reach a flathead that >>>>> controls the brew pressure, along with a sticker telling me to never >>>>> adjust >>>>> it myself. I replaced that manky broken original that was controlled with >>>>> plastic flathead some years ago with what looks like a nicer one that has >>>>> a >>>>> metal flathead fitting. >>>>> >>>>> Today the new pressure control started failing, only getting an >>>>> indicated 5-6 bar. Bunch of water goes into the drip tray. >>>>> >>>>> The new pressure control looks like it could be disassembled if my >>>>> snapring plyers weren't broken but I'm wondering if someone can recommend >>>>> a >>>>> better part that will last longer? >>>>> >>>>> Or do I just order a new one? >>>>> >>>>> Thanks, >>>>> Eric >>>>> >>>>> >>>> -- >>>> 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 https://groups.google.com/group/brewtus. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> >>> -- >>> 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 https://groups.google.com/group/brewtus. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> > -- > 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] <javascript:>. > To post to this group, send email to [email protected] <javascript:> > . > Visit this group at https://groups.google.com/group/brewtus. > For more options, visit https://groups.google.com/d/optout. > > > -- You received this message because you are subscribed to the Google Groups "Brewtus" group. 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