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Gaggia Classic - Wet Puck
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Jim907
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Joined: 18 Oct 2005
Posts: 10
Location: Anchorage Alaska
Expertise: I love coffee

Espresso: QuickMill Vetrano
Grinder: Rancilio Rocky Grinder
Posted Sat Sep 20, 2008, 11:06am
Subject: Gaggia Classic - Wet Puck
 

I've noticed I all of a sudden have a small amount of water on top of my spent portafilter puck.  My Gaggia Classic is only 3-1/2 years old.  I draw 3-4 double shots a day.  I have descaled the boiler and back flushed the system through the solenoid valve.  It continues to produce perfect shots of espresso with thick creama perfecta.  My draw is still 25-30 seconds, same grind, same tamp, same beans, nothing changed just a couple mm of water standing on top of the spent puck.  I'm not super concerned just curious if anyone else has experienced this?

-Jim
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Dooglas
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Dooglas
Joined: 12 Mar 2005
Posts: 731
Location: Portland, OR
Expertise: I love coffee

Espresso: Vibiemme Junior
Grinder: Vario, Virtuoso
Drip: Bonavita, Bodum press
Roaster: GeneCafe, Behmor
Posted Sun Sep 21, 2008, 9:10am
Subject: Re: Gaggia Classic - Wet Puck
 

Hmm, you do regularly backflush using a cleaner like Cafiza? When you do, if there a good healthy blast of soapy water through the 3-way valve? If so, I don't know why water under pressure would not go the same route. If not, I'd guess that is your problem area.
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gime2much
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Joined: 10 Dec 2004
Posts: 1,965
Location: Sunny S Fl
Expertise: I love coffee

Espresso: La Pavoni, Astoria comm, 2...
Grinder: La Pavoni Zip, Bunn...
Drip: Bunn comm
Roaster: Popcorn popper (air),co/ufo
Posted Sun Sep 21, 2008, 9:30am
Subject: Re: Gaggia Classic - Wet Puck
 

Happens in my Gaggia when I drop the dose to 12g or so. Never at 14-15g.


EDIT:    Just remembered that this was happening from time to time just before changing burrs on one of my grinders. I think the grind was getting sloppy on the old burrs, too many chunks and fines. How many pounds have gone thru your grinder?

 
Dan Brewer
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Jim907
Senior Member


Joined: 18 Oct 2005
Posts: 10
Location: Anchorage Alaska
Expertise: I love coffee

Espresso: QuickMill Vetrano
Grinder: Rancilio Rocky Grinder
Posted Mon Sep 22, 2008, 9:18am
Subject: Re: Gaggia Classic - Wet Puck
 

I didn't think about dosing quantity.  I grind about 3 lbs a month.  3-1/2 years x 3 = about 125 lbs would be a good guess.  I'll check the burrs.  

I do a back flush once a week or so...  water only  I've  done the cleaner maybe once every six months.  I get a fairly good splash out of the downspout when I turn off pump while making espresso.  The splash is substantial when I use the rubber membrane, everything appears to be working correctly.  I'll round up some cleaner/detergent (I might have sometime hung up).

Thanks for the suggestions.

-Jim
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