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Gaggia Dose excessive dripping
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Motters
Senior Member


Joined: 26 May 2013
Posts: 2
Location: Midhurst
Expertise: Just starting

Posted Sun May 26, 2013, 12:48am
Subject: Gaggia Dose excessive dripping
 

Hi everyone, I have been looking at Espresso machines for around 6 months as I have enjoyed cafe drinks for many years and decided to treat myself to a machine in an effort to learn the craft myself.  My brother in law has a Gaggia Dose and always produces great coffee when we visit.  I found one of these on eBay and for the measely sum of 36 I now have one of my own.  I have been experimenting a lot and am getting some decent results.  I noticed the group head was dripping a lot after pulling the shot and after consulting the manual I cleaned the 'shower head' which had a fair amount of build up. This massively reduced the dripping but I am getting a similar problem when priming the machine for steam. As the water boils to the required temperature the dripping increases until the green light stays on and I release the pressure through the wand.

My main question is what could be causing this? From reading other posts I'm seeing lots of stuff about cleaning valves, gaskets, descaling etc. do I need to try and do all these or is this a common issue with a standard cause? As a raw newbie I am somewhat nervous about completely dismantling my new machine but am happy to do so if the guidance is idiot proof.

Cheers
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fwtechwiz
Senior Member


Joined: 19 Feb 2010
Posts: 530
Location: Fort Wayne, IN
Expertise: I live coffee

Espresso: Gaggia Evolution
Grinder: Hario Skerton
Posted Sun May 26, 2013, 3:26am
Subject: Re: Gaggia Dose excessive dripping
 

If there was a fair amount of buildup under the shower screen, you can bet the group valve has never been removed and cleaned.  Underneath the shower screen, you'll see the group valve.  Remove this valve (I believe it is a 7mm size) and disassemble.  There is a spring and a small plastic ball at the end.  Clean any built up scale off the end of this ball.  Run a pipe cleaner through the hole in the valve to remove any buildup in the hole, also run the pipe cleaner up into the hole that the valve screws into to remove any scale buildup inside this hole.  This is the number one cause of leakage with this class of machine.

Would probably be a good idea to do a descale of the boiler while this valve is removed.  If there's a lot of scale, it will flush out all the nasty bits without plugging up the valve.
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Motters
Senior Member


Joined: 26 May 2013
Posts: 2
Location: Midhurst
Expertise: Just starting

Posted Sun May 26, 2013, 10:34am
Subject: Re: Gaggia Dose excessive dripping
 

Thanks for the advice, I've just finished a full clean and descale of all the parts and the boiler. The dripping, whilst not completely stopped has lessened.

I saw a you tube piece on doing this job and noticed that, as they described, the 'mushroom' valve was indented rather than a nicely rounded dome which, in turn, causes leaks so I will get this part replaced and that should just about do it.
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Burner0000
Senior Member


Joined: 28 Jul 2011
Posts: 1,090
Location: Cambridge, Ontario Canada
Expertise: Professional

Espresso: Rancilio Silvia, VFA Expres...
Grinder: Macap MX/VFA N1464/Kyocera...
Drip: Manual Drip, French Press
Roaster: Behmor 1600 / Sonofresco
Posted Mon May 27, 2013, 5:16am
Subject: Re: Gaggia Dose excessive dripping
 

Motters Said:

Thanks for the advice, I've just finished a full clean and descale of all the parts and the boiler. The dripping, whilst not completely stopped has lessened.

I saw a you tube piece on doing this job and noticed that, as they described, the 'mushroom' valve was indented rather than a nicely rounded dome which, in turn, causes leaks so I will get this part replaced and that should just about do it.

Posted May 26, 2013 link

I also think the Dose model doesn't have a 3 way solenoid valve to relieve access water on top of the puck which would cause this issue.  Run a bit of water after you pull a shot to help keep the group clean.
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,947
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon May 27, 2013, 5:39am
Subject: Re: Gaggia Dose excessive dripping
 

Chris, that is my thought as well, the lower end of starter machines need to bleed pressure through the puck due to the lack of a 3way valve. This also leads to soggy pucks that many wonder about.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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deleted
Senior Member


Joined: 11 Jun 2014
Posts: 199
Expertise:

Posted Thu Aug 8, 2013, 2:10pm
Subject: Re: Gaggia Dose excessive dripping
 

A few login problems later I have ditched the Dose as the flimsy plastic rims in the group head broke and the dose button experienced electrical issues, as well as a pump failure... So I have bitten the bullet and bought a new Gaggia Classic. Already the sturdiness and quality seem a class apart!
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D4F
Senior Member


Joined: 15 Mar 2012
Posts: 2,025
Location: USA
Expertise: I like coffee

Espresso: Gaggia Classic PID
Grinder: Baratza Forte-AP
Posted Thu Aug 8, 2013, 8:09pm
Subject: Re: Gaggia Dose excessive dripping
 

Looks like you have resolved the Gaggia problems and the login problems.  Post if help is needed.

 
D4F also at
http://www.gaggiausersgroup.com/
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