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Second Shot on La Pavoni (Pre-Millenium)
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Discussions > Espresso > Lever Espresso > Second Shot on...  
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fifthmonkee
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Joined: 24 Apr 2013
Posts: 9
Location: Tennessee
Expertise: I love coffee

Posted Wed Jun 5, 2013, 2:51pm
Subject: Second Shot on La Pavoni (Pre-Millenium)
 

I am getting reacquainted with my refurbished 1980 La Pavoni and have a question. People talk about pulling a second shot on the machine. How is that done? When I remove the portafilter after the first shot (while the machine is still  hot) it spits espresso everywhere and I'm too busy cleaning up to load a second shot. Am I running the machine too hot?

To make the shot, I first turn on the machine and press button II and let it warm till steam starts to escape. Then let out some steam from the wand and turn the button down to I. Then I pull a blank shot through the portafilter (though this also spits water) and then load and pull the shot.

Thoughts?
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SStones
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SStones
Joined: 24 Nov 2012
Posts: 452
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 Thu Jun 6, 2013, 4:43am
Subject: Re: Second Shot on La Pavoni (Pre-Millenium)
 

If you're getting any flow out of the group with the control lever down, you need to clean the piston and possibly replace the seals on it...  If however the spitting after the first shot is nothing more than residual pressure trapped in the portafilter, you might be able to get it to dissipate by raising the lever just a couple inches, lowering and repeating before you turn the portafilter to remove it.

Alternatively, yes. It is possible that it is too hot if you're getting water "Spitting" out, ie the liquid water is propelled by rapidly expanding steam in the grouphead. It is also possible that your draw pipe, behind the grouphead that extends toward the bottom of your boiler to reach the liquid water below the steam. It is possible that that pipe is cracked or not tightly sealed into the grouphead so that steam is getting delivered to your grouphead. Does the spitting go away when the boiler is filled right to the top of the sightglass?
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hankbates
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hankbates
Joined: 2 Feb 2012
Posts: 46
Location: Yarmouth Port, Cape Cod, Massachusetts
Expertise: I love coffee

Espresso: La Pavoni Professional...
Grinder: LaPavoni Jolly
Roaster: Hottop
Posted Thu Jun 6, 2013, 5:49am
Subject: Re: Second Shot on La Pavoni (Pre-Millenium)
 

A "sneeze" when removing the portafilter in a properly sealed machine indicates that there is superheated water in the puck.  Since the optimum brewing temperature is below boiling (no superheat) a sneeze tells me I brewed too hot.

Could you be letting the machine sit too long at pressure?  Brewing is a moving target in these machines.
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fifthmonkee
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Joined: 24 Apr 2013
Posts: 9
Location: Tennessee
Expertise: I love coffee

Posted Tue Jun 11, 2013, 6:41pm
Subject: Re: Second Shot on La Pavoni (Pre-Millenium)
 

It happens regardless of the level of water in the sight glass. The machine has recently been refurbished with seals replaced. If I did need to clean the piston, how would I go about that?
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fifthmonkee
Senior Member


Joined: 24 Apr 2013
Posts: 9
Location: Tennessee
Expertise: I love coffee

Posted Tue Jun 11, 2013, 6:43pm
Subject: Re: Second Shot on La Pavoni (Pre-Millenium)
 

What's the best way to achieve the right temperature with these machines for a shot? I don't have a gauge. I let the machine heat up on II, then when steam starts coming out of the pressure valve, I let it go for about a minute and then turn it down to I, prepare and pull the shot.
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drgary
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Joined: 21 Jan 2010
Posts: 141
Location: San Francisco
Expertise: I love coffee

Espresso: Baby Lusso Caravel Coffex...
Grinder: Pharos, Rio Super Jolly,...
Vac Pot: AeroPress
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Roaster: Heat Gun/Bread Machine,...
Posted Fri Jun 28, 2013, 12:41pm
Subject: Re: Second Shot on La Pavoni (Pre-Millenium)
 

That will make it way too hot. See:

Tips for Controlling Brew Temperature on a Home Lever Espresso Machine

Reaching the Zen Zone with a Two Switch La Pavoni
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