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Espresso: Lever Espresso Machines
No water through group head.
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Discussions > Espresso > Lever Espresso > No water through...  
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haagaard
Senior Member


Joined: 8 Jan 2010
Posts: 5
Location: Denmark
Expertise: I love coffee

Posted Sun Jan 5, 2014, 9:48am
Subject: No water through group head.
 

I've just cleaned my La Pavoni Pro, which I've done several times before. It does include cleaning of the group head etc.
After assembling everything, the water does not come through the group head.
Steam does work fine and the water is boiling correctly etc.

How can it be, that there's no water coming through the group head?
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crazy4espresso
Senior Member
crazy4espresso
Joined: 19 Jan 2008
Posts: 147
Location: Toronto
Expertise: I love coffee

Espresso: Silvia, La Pavoni...
Grinder: Pharos
Posted Sun Jan 5, 2014, 10:14am
Subject: Re: No water through group head.
 

Look inside the boiler.  Do you have a lot of scale buildup? Could be the dipper tube is clogged. Does your machine have the brass or ryton piston?  Sometimes the piston can unscrew from the rod which won't allow water into the chamber, and may also push out the screen.  Inspect the piston and report back.
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haagaard
Senior Member


Joined: 8 Jan 2010
Posts: 5
Location: Denmark
Expertise: I love coffee

Posted Sun Jan 5, 2014, 11:39am
Subject: Re: No water through group head.
 

The piston was indeed unscrewed from the rod. Thank you. It works perfectly now :)
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uscfroadie
Senior Member
uscfroadie
Joined: 2 Aug 2008
Posts: 398
Location: San Antonio
Expertise: I live coffee

Espresso: GS/3 Strada MP, BDB; owned...
Grinder: Forte, Zass and PeDe hand...
Vac Pot: Nope
Drip: Nope
Roaster: owned Behmor
Posted Tue Jan 7, 2014, 8:30am
Subject: Re: No water through group head.
 

haagaard Said:

The piston was indeed unscrewed from the rod. Thank you. It works perfectly now :)

Posted January 5, 2014 link

Glad you fixed it.  One of the main causes of this after servicing is due to the user installing the lever's yoke upside down.  If you look at the holes, they are offset a little.  When installed upside down, the bottom of the piston will not full expose the inlet hole in the grouphead, producing only a trickling of water.  And as you've seen, a piston that is unscrewing will do the same.

Hope this helps someone in the future.
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bimmere60
Senior Member
bimmere60
Joined: 7 Sep 2011
Posts: 4
Location: Morón de la Frontera, Spain
Expertise: I love coffee

Espresso: La Pavoni Europiccola
Grinder: Rancilio Rocky
Roaster: Behmor 1600
Posted Thu Jan 9, 2014, 11:59pm
Subject: Re: No water through group head.
 

I am glad I found this post on the forum.  My situation is similar.  In the last year, I have replaced the seals twice.  This last time, I tested it and it ran like it was brand new again.  However after pulling about 30 shots from it the water is starting to trickle out and the group does not fill up with water.  I recently moved when I discovered it was not working correctly so I thought maybe something happened to the seals due to pressure and elevation.  Now I am wondering if it is something I did not do.  I cleaned and lubed all the parts, replaced the seals to the group head as the seals to the sight glass are fine.  Any help to understanding this would be great.
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 477
Location: Canada
Expertise: Professional

Espresso: Giga 5, ECM Giotto, Rocket...
Grinder: Anfim Milano-Best
Vac Pot: No  :(
Drip: Some $30 thing from Walmart
Roaster: I buy pre-roasted.
Posted Mon Jan 20, 2014, 8:05pm
Subject: Re: No water through group head.
 

Make sure the piston is screwed right up onto the threads of the piston rod when you cleane/replace the seals.  A little loc-tite may help prevent it unthreading with use.
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