Markarian Senior Member Joined: 27 Jun 2012 Posts: 474 Location: Seattle Area Expertise: I love coffee
Espresso: Modded Nuova Simonelli Oscar Grinder: Vario-W, Mazzer Super Jolly Drip: Moka, Aeropress, Melitta 102 Roaster: Wear-Ever Popcorn Pumper
Posted Sat Sep 29, 2012, 12:26pm Subject: Re: The Oscar Saga Continues: Backflush Explosion
So now the copper tube on the bottom of the group (HX return?) is leaking at the connecting nut when under pressure, brewing and backflushing. I just want to see if I can tighten it, but I can't get to the nut without taking the front off, and in trying to take the front off, I'm trying to figure out how to get the steam knob off so I can actually remove the panel. I don't know how to remove the steam knob, or if that's all that's needed to get the panel off. Do I need to actually turn the machine off and depressurize the boiler before doing this?
Markarian Senior Member Joined: 27 Jun 2012 Posts: 474 Location: Seattle Area Expertise: I love coffee
Espresso: Modded Nuova Simonelli Oscar Grinder: Vario-W, Mazzer Super Jolly Drip: Moka, Aeropress, Melitta 102 Roaster: Wear-Ever Popcorn Pumper
Posted Sun Sep 30, 2012, 10:57am Subject: Re: The Oscar Saga Continues: Backflush Explosion
Ha! We DID fix it, I believe. The 3 way solenoid was leaking where it seals against the group head. We tightened it and it looks okay now. My only gripe right now right now is that the new gasket still leaks sometimes unless I really torque that PF down. Also, any of you using a bottomless PF for Oscar? I just got mine.
Markarian Senior Member Joined: 27 Jun 2012 Posts: 474 Location: Seattle Area Expertise: I love coffee
Espresso: Modded Nuova Simonelli Oscar Grinder: Vario-W, Mazzer Super Jolly Drip: Moka, Aeropress, Melitta 102 Roaster: Wear-Ever Popcorn Pumper
Posted Sun Sep 30, 2012, 5:42pm Subject: Re: The Oscar Saga Continues: Backflush Explosion
I've pulled some decent shots and some great lattes since last night, but that new gasket is irking me as half the time when it gets up to pressure it starts leaking a little around the sides and i get water in my cup.
Posted Sun Sep 30, 2012, 8:01pm Subject: Re: The Oscar Saga Continues: Backflush Explosion
The group gasket, particularly a new one, should feel a bit "spongy" when locking the PF. There should be a feeling of "give" to it when locking. it is possible that the one you got was old stock and dried out a bit. We have to assume that all teh old gasket was removed and there was a clean, flat surface for it to mate to in the group.
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