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Olympia Cremina; Replaced piston gaskets, NO pressure!
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christoz
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Joined: 14 Feb 2014
Posts: 7
Location: texas
Expertise: Just starting

Posted Sun May 11, 2014, 3:18pm
Subject: Olympia Cremina; Replaced piston gaskets, NO pressure!
 

I just replaced the gaskets in my group on my Olympia Cremina. I used Orphan Espresso gaskets.  After I installed the new gaskets on the piston, it felt like it slid up and down TOO easy. Sure enough, I get the group put back on, try to pull a shot and I have NO pressure in the group head. Feels like the water just slips past the seals on the down stroke and I can't get any pressure.  Yes, the seals are right-side up/down. Anyone have any suggestions? Thanks.

Chris
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z0mbie
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z0mbie
Joined: 26 Sep 2013
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Posted Sun May 11, 2014, 9:35pm
Subject: Re: Olympia Cremina; Replaced piston gaskets, NO pressure!
 

christoz Said:

I just replaced the gaskets in my group on my Olympia Cremina. I used Orphan Espresso gaskets.  After I installed the new gaskets on the piston, it felt like it slid up and down TOO easy. Sure enough, I get the group put back on, try to pull a shot and I have NO pressure in the group head. Feels like the water just slips past the seals on the down stroke and I can't get any pressure.  Yes, the seals are right-side up/down. Anyone have any suggestions? Thanks.

Chris

Posted May 11, 2014 link

When you say gasket I assume you're talking about the piston seals, not the group gasket.

Which way did you orient the seals that you think is right?
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christoz
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Posts: 7
Location: texas
Expertise: Just starting

Posted Mon May 12, 2014, 4:57am
Subject: Re: Olympia Cremina; Replaced piston gaskets, NO pressure!
 

Yes. Piston seals. Oriented with the grooved side facing up (towards the sky, if you will).  Thanks
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SeekingGodShots
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Joined: 21 Jan 2006
Posts: 22
Location: California
Expertise: I live coffee

Posted Mon May 12, 2014, 7:59pm
Subject: Re: Olympia Cremina; Replaced piston gaskets, NO pressure!
 

...the top piston seal - groove up
...the bottom piston seal - groove down

The widest part of the seal points away from each other...sort of like this   \__/
                                                                                                                              /__\

 
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z0mbie
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z0mbie
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Posted Mon May 12, 2014, 11:31pm
Subject: Re: Olympia Cremina; Replaced piston gaskets, NO pressure!
 

SeekingGodShots Said:

...the top piston seal - groove up
...the bottom piston seal - groove down

The widest part of the seal points away from each other...sort of like this   \__/
                                                                                                                              /__\

Posted May 12, 2014 link

Good try with the ascii art but a photo will be better ;)

Cremina piston
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christoz
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Joined: 14 Feb 2014
Posts: 7
Location: texas
Expertise: Just starting

Posted Wed May 14, 2014, 6:31pm
Subject: Re: Olympia Cremina; Replaced piston gaskets, NO pressure!
 

I took a photo of one of the gaskets before I removed them so I would have a photo reference after I disassembled them. Coincidentally, I took a photo of the bottom one. I'm looking at it right now. It's groove up.  Mine looked nothing like your photo. Yours are asymmetrical and they have a pointed edge. Mine are symmetrical and the edge is flat and straight.  Look at the photo.

christoz: gasket2.jpg
(Click for larger image)
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christoz
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Joined: 14 Feb 2014
Posts: 7
Location: texas
Expertise: Just starting

Posted Wed May 14, 2014, 6:41pm
Subject: Re: Olympia Cremina; Replaced piston gaskets, NO pressure!
 

Here is a photo from the top side.

christoz: gasket1.jpg
(Click for larger image)
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z0mbie
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z0mbie
Joined: 26 Sep 2013
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Location: Online
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Posted Thu May 15, 2014, 12:50am
Subject: Re: Olympia Cremina; Replaced piston gaskets, NO pressure!
 

I wonder what the rest of the machine looked like.. yikes.
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SeekingGodShots
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Joined: 21 Jan 2006
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Location: California
Expertise: I live coffee

Posted Sat May 17, 2014, 8:04am
Subject: Re: Olympia Cremina; Replaced piston gaskets, NO pressure!
 

Considering the condition of the piston seals;  check the condition of the upper group sleeve and the group sleeve o ring condition.   If the sleeve is cracked or the o ring has rotted away,  water will bypass the piston and leak down the group head.  In fact replace all the seals and o rings associated with the group head.

 
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