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kircough
Senior Member


Joined: 20 Nov 2013
Posts: 3
Location: Swansea
Expertise: I love coffee

Posted Wed Nov 20, 2013, 1:03pm
Subject: Starbucks Barista machine woes
 

Hi, first post here.

I've had a Starbucks Barista for about 10 years and it's always been good as gold until recently. It seems to jam up when pulling shots, the pump works ok and the steam works fine, just when shots are pulled it seems to jam and drip drip drip espresso.

I first thought it was a too fine grind or a too heavy tamp, but I've tried lots of different coarser grinds, no tamp pressure and even only half a dose of coffee in the pf. I've also taken out the pf pressure contraption thingy, and I've also got a spare pf which I've drilled out to try and make a bottomless pf but the brew just seems to go all over the sides and through the screw holes on the pf.

Any ideas?
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fnacer
Senior Member


Joined: 25 Feb 2007
Posts: 465
Location: Denver
Expertise: I love coffee

Espresso: Salvatore E61, Vivaldi Mini...
Grinder: Mazzer Mini, Gaggia MDF,...
Roaster: Behmor 1600
Posted Wed Nov 20, 2013, 10:49pm
Subject: Re: Starbucks Barista machine woes
 

What you describe is often caused by coffee grounds blocking the screen or scale blocking the water path to the grouphead. How often do you clean the machine and descale it?
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D4F
Senior Member


Joined: 15 Mar 2012
Posts: 2,021
Location: USA
Expertise: I like coffee

Espresso: Gaggia Classic PID
Grinder: Baratza Forte-AP
Posted Wed Nov 20, 2013, 11:28pm
Subject: Re: Starbucks Barista machine woes
 

Hi, welcome to CG.

A good place to start in talking about the machine.

http://www.partsguru.com/user/Barista%2005.01.pdf

Another helpful site

http://www.partsguru.com/user/Barista%2005.01.pdf

When you say the pump works ok, you mean that you get great flow out of the steam wand when running the pump?

If you take 42, 44, and 45 out and open the steam valve, unplugged from electricity, does water flow?  That should allow the boiler to drain, air back through the wand and water out the bottom.

10 years old and what maintenance?  Descale?

 
D4F also at
http://www.gaggiausersgroup.com/
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kircough
Senior Member


Joined: 20 Nov 2013
Posts: 3
Location: Swansea
Expertise: I love coffee

Posted Thu Nov 21, 2013, 2:02am
Subject: Re: Starbucks Barista machine woes
 

Thanks for the replies. I should have also said that water will pour through the group head, and an empty pf will allow the water through without any problems. I have descaled the machine and I live in a very soft water area.
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fnacer
Senior Member


Joined: 25 Feb 2007
Posts: 465
Location: Denver
Expertise: I love coffee

Espresso: Salvatore E61, Vivaldi Mini...
Grinder: Mazzer Mini, Gaggia MDF,...
Roaster: Behmor 1600
Posted Fri Nov 22, 2013, 10:40pm
Subject: Re: Starbucks Barista machine woes
 

What you've said so far is that:

1) The pump is fine
2) The path from the pump to the grouphead is fine (descaling and cleaning-wise)
3) The screen is fine
4) The basket is fine
5) The coffee is fine

Usually, that adds up to "the machine is fine".

Let's assume for now that your assertions are correct. When you are pulling a shot and you only get drips out of the portafilter, is hose #60 (on the hydraulic diagram that D4F pointed you to) letting out any water? if so, #62 may be defective.
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D4F
Senior Member


Joined: 15 Mar 2012
Posts: 2,021
Location: USA
Expertise: I like coffee

Espresso: Gaggia Classic PID
Grinder: Baratza Forte-AP
Posted Fri Nov 22, 2013, 10:49pm
Subject: Re: Starbucks Barista machine woes
 

Sorry that I posted the same link twice above.  The other helpful site

Click Here (www.ifixit.com)

 
D4F also at
http://www.gaggiausersgroup.com/
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kircough
Senior Member


Joined: 20 Nov 2013
Posts: 3
Location: Swansea
Expertise: I love coffee

Posted Tue Nov 26, 2013, 10:00am
Subject: Re: Starbucks Barista machine woes
 

fnacer Said:

What you've said so far is that:

1) The pump is fine
2) The path from the pump to the grouphead is fine (descaling and cleaning-wise)
3) The screen is fine
4) The basket is fine
5) The coffee is fine

Usually, that adds up to "the machine is fine".

Let's assume for now that your assertions are correct. When you are pulling a shot and you only get drips out of the portafilter, is hose #60 (on the hydraulic diagram that D4F pointed you to) letting out any water? if so, #62 may be defective.

Posted November 22, 2013 link

No, that hose is dry on running. I've descaled again and sti getting the same problem. I just don't get it. It's like there's not enough pressure coming through the group head to push through the coffee. Is there a possibility that grounds may have back washed up into the boiler causing blockage perhaps?
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