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Oscar PSTAT adjustment needed?
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Discussions > Espresso > Machines > Oscar PSTAT...  
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Markarian
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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 Jan 27, 2013, 2:14pm
Subject: Re: Oscar PSTAT adjustment needed?
 

I think it stopped pulsing, and it had a normal flush this morning. I managed to fill my flush carafe without it stopping the flow. Did this fix itself again?? You guys saw it, right?

Markarian: mj-ani.gif
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Coffeenoobie
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Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,052
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sun Jan 27, 2013, 3:57pm
Subject: Re: Oscar PSTAT adjustment needed?
 

I could be that safety valve getting ready to go belly up.

 
Coffeenoobie

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

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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 Sun Jan 27, 2013, 4:04pm
Subject: Re: Oscar PSTAT adjustment needed?
 

Which safety valve? Not the neplax valve, right? Do you mean the boiler safety valve on the top? Wouldn't I be hearing some sort of hiss or pop?
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Coffeenoobie
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Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,052
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sun Jan 27, 2013, 6:24pm
Subject: Re: Oscar PSTAT adjustment needed?
 

No you would not.  Let me find my thread.  My machine acted strange for a while before it broke enough for me to diagnose what was wrong.

http://coffeegeek.com/forums/espresso/machinemods/577323

 
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 Sun Jan 27, 2013, 7:23pm
Subject: Re: Oscar PSTAT adjustment needed?
 

Oh that valve! Now that you mention it, it would make sense. It might also be the mysterious occasional "ticking" noise that happens mid-brew and changes my pressure. You said the plastic bit was $6? Should I run down to NS tomorrow and grab one? How hard was it to get at the valve and service it? Thanks again, Helen.
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,052
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Mon Jan 28, 2013, 12:11am
Subject: Re: Oscar PSTAT adjustment needed?
 

I would if I lived close, it is only 6 bucks.  I am guessing that might be failing and causing the pulsing you are just starting to see. It was not hard but you have to break it all down to get to it.  I scraped and painted my frame a bit were some rust was while I fixed that so it was a good thing.

 
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 Mon Jan 28, 2013, 12:19am
Subject: Re: Oscar PSTAT adjustment needed?
 

Thanks again, Helen. I think I might attack it tomorrow since I have to drop my better half off at work anyway. I'm intimidated by taking the frame out of the plastic and trying to figure out just how involved it is and what all needs to be disconnected. Any tips? If NS downtown doesn't have it, I'll have to order it from Ferndale or espressoparts.
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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 Mon Jan 28, 2013, 3:17am
Subject: Re: Oscar PSTAT adjustment needed?
 

So, um, yeah...

Definitely going to be giving Simonelli a call in a few hours. Helen, how do I put this thing back together? There's a hard black retaining ring, it seems, as well as the green valve, the little spring, and the chewed up white thing that seems to hold the valve in the center. Is there a gasket that I need for the brass parts, or is it just teflon tape? Could this be the cause of all my problems:

-Inconsistent brew pressure?
-Horrible rattling sound during the pump cycle?
-Intermittent pulsing during the brew cycle?
-HX flash steaming and losing water occasionally?

Also, I'm worried about the fact that it looks as if the three-legged plastic part comes from a much larger plastic assembly which is just...gone. Hopefully it's not inside the HX, but just to be sure I'm going to shop-vac it out with a micro hose kit.

Markarian: valve1.jpg
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,052
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Mon Jan 28, 2013, 9:47am
Subject: Re: Oscar PSTAT adjustment needed?
 

Wow your looks much worse than mine did. Did you see my before and after parts photo? It shows what it looked like when I found it and what it was supposed to look like. A broken part in the works is bad and could have caused a lot of problems.  I know it can cause the last two issues on your list, probably the first one, not sure about the rattle.

To take Oscar apart.
http://www.elektros.it/en/tips-and-tricks.html

 
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 Mon Jan 28, 2013, 2:16pm
Subject: Re: Oscar PSTAT adjustment needed?
 

Ran down to Simonelli and just picked up two new plastic check valves (seems like I should have a spare), as well as a new brass housing. Will be installing them this afternoon and will report back!
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