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The Oscar Saga Continues: Backflush Explosion
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Discussions > Espresso > Machines > The Oscar Saga...  
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,031
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Fri Sep 28, 2012, 5:00pm
Subject: Re: The Oscar Saga Continues: Backflush Explosion
 

Stefano, I understood this your emails directly to me about my machine.  I am sorry if I misunderstood your email.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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Markarian
Senior Member
Markarian
Joined: 27 Jun 2012
Posts: 658
Location: Seattle Area
Expertise: I love coffee

Espresso: ECM Technika IV Profi WT-WC
Grinder: Baratza Forte AP, HG One
Vac Pot: Bunn Trifecta MB
Drip: Moka, Aeropress, Hario V60
Roaster: Behmor 1600
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?
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Markarian
Senior Member
Markarian
Joined: 27 Jun 2012
Posts: 658
Location: Seattle Area
Expertise: I love coffee

Espresso: ECM Technika IV Profi WT-WC
Grinder: Baratza Forte AP, HG One
Vac Pot: Bunn Trifecta MB
Drip: Moka, Aeropress, Hario V60
Roaster: Behmor 1600
Posted Sat Sep 29, 2012, 10:23pm
Subject: Re: The Oscar Saga Continues: Backflush Explosion
 

Disregard. We fixed it--it was a loose 3 way solenoid. I'm an idiot and I'm going to get some sleep after a decaf breve.
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,031
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sun Sep 30, 2012, 10:18am
Subject: Re: The Oscar Saga Continues: Backflush Explosion
 

I know it is hard when you are all excited and can't drink any more espresso.... But I think you are getting there.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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frcn
Senior Member
frcn
Joined: 23 Dec 2001
Posts: 3,411
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
Posted Sun Sep 30, 2012, 10:24am
Subject: Re: The Oscar Saga Continues: Backflush Explosion
 

Markarian Said:

Disregard. We fixed it--it was a loose 3 way solenoid. I'm an idiot and I'm going to get some sleep after a decaf breve.

Posted September 29, 2012 link

You can sleep when you are dead! FIX THAT MACHINE!  ;-)

 
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Markarian
Senior Member
Markarian
Joined: 27 Jun 2012
Posts: 658
Location: Seattle Area
Expertise: I love coffee

Espresso: ECM Technika IV Profi WT-WC
Grinder: Baratza Forte AP, HG One
Vac Pot: Bunn Trifecta MB
Drip: Moka, Aeropress, Hario V60
Roaster: Behmor 1600
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.
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,031
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sun Sep 30, 2012, 11:42am
Subject: Re: The Oscar Saga Continues: Backflush Explosion
 

Naked is all I use unless I am doing a party where I might split doubles and make less mess if I screw up.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,031
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sun Sep 30, 2012, 11:44am
Subject: Re: The Oscar Saga Continues: Backflush Explosion
 

How does it taste now?

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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 View Profile Visit website Link to this post
Markarian
Senior Member
Markarian
Joined: 27 Jun 2012
Posts: 658
Location: Seattle Area
Expertise: I love coffee

Espresso: ECM Technika IV Profi WT-WC
Grinder: Baratza Forte AP, HG One
Vac Pot: Bunn Trifecta MB
Drip: Moka, Aeropress, Hario V60
Roaster: Behmor 1600
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.
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frcn
Senior Member
frcn
Joined: 23 Dec 2001
Posts: 3,411
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
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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