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olympia cremina 67 -- stubborn prob
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dlnyc
Senior Member


Joined: 12 Oct 2013
Posts: 1
Location: new york
Expertise: Just starting

Espresso: olympia cremina 67
Posted Sat Oct 12, 2013, 5:26am
Subject: olympia cremina 67 -- stubborn prob
 

Pressure sometimes builds up so much  when the machine is left on for even 10 minutes,  that often I can't even raise the piston without first turning off the machine and opening up the steam valve.  It sounds like the machine is going to explode -- and if I dont catch it in time, steam starts shooting out from the body of the machine like a pressure cooker ( I assume the pressure valve-- that may be the wrong name -- it's located at the base of the boiler ).  It sounds like it's about to explode...The repair guys have replaced the pressure regulator  (or safety valve) multiple times in the past few months and it works fine for a week or so, but the problem returns i. It was suggested that I remove the housing of the machine and adjust the pressure valve, myself....But that doesn't really feel like a fix...Any thoughts?  Defective part?  New approach?  FEELS LIKE A PROBLEM FOR CAR TALK! HELP!
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fnacer
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Joined: 25 Feb 2007
Posts: 476
Location: Denver
Expertise: I love coffee

Espresso: Vivaldi Mini S1, Rancilio...
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Posted Sun Oct 13, 2013, 8:59pm
Subject: Re: olympia cremina 67 -- stubborn prob
 

Not quite sure what "the repair guys" did. Your machine uses a pressurestat to regulate the pressure in the boiler. The pressurestat normally keeps the pressure from dropping too low (by turning on the heater when the lower limit is reached) and from rising too high (by turning off the heater when the upper limit is reached). Maybe they replaced the pressurestat. But I doubt they did so multiple times.

It's possible that the pressurestat is set to too high a pressure. And it's easy enough to try to adjust it lower. Check the instructions on Orphan Espresso's website.

The machine should have a safety valve that activates if the steam pressure builds up to dangerous levels. The safety valve is located at the top of the boiler where the steam is, not the bottom (which is filled with water). So that steam that is escaping from the bottom of the machine may indicate another problem. If adjusting the pressure doesn't fix the problem, post a picture showing where the steam is escaping from. Someone should be able to suggest the next step.
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