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Possible UKLA pump issues
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D4F
Senior Member


Joined: 15 Mar 2012
Posts: 2,005
Location: USA
Expertise: I like coffee

Espresso: Gaggia Classic PID
Grinder: Baratza Forte-AP
Posted Sun Sep 8, 2013, 7:45pm
Subject: Re: Possible UKLA pump issues
 

A little help

http://coffeetime.wikidot.com/vibration-pump-is-it-worn-out

Click Here (www.home-barista.com)

Click Here (ulkapumprepair.blogspot.com.ar)

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


Joined: 28 Jun 2013
Posts: 23
Location: Alameda,CA
Expertise: Just starting

Espresso: Starbuck Barista
Posted Mon Sep 9, 2013, 2:07pm
Subject: Re: Possible UKLA pump issues
 

So this morning I tightened up all the brass fittings as tight as I could, and took a pressure test. There was a tiny tiny bit of leakage, but the gauge held at 10 bar. So it seems like the the leakage is what was causing the pressure drop, so hopefully all is well with the pump. I hope to get my needle valve in tonight so I can get a more accurate reading with a simulated shot.
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iko
Senior Member


Joined: 30 Aug 2013
Posts: 58
Location: Toronto
Expertise: Just starting

Posted Mon Sep 9, 2013, 5:11pm
Subject: Re: Possible UKLA pump issues
 

dshavers Said:

So this morning I tightened up all the brass fittings as tight as I could, and took a pressure test. There was a tiny tiny bit of leakage, but the gauge held at 10 bar. So it seems like the the leakage is what was causing the pressure drop, so hopefully all is well with the pump. I hope to get my needle valve in tonight so I can get a more accurate reading with a simulated shot.

Posted September 9, 2013 link

Pesky copper compression fitting eh? Careful, if they're too tight, they also leak. The specs for 1/4 compression fitting is 1 and 1/4 turns after hand tight. But... if you got a leaky one, although the spec doesn't recommend it, you can open the fitting and either use a few turns of teflon plumber's tape on the olive, or a little teflon paste. A great number of people have solved a leaky fitting that way, when one cannot afford to redo the whole tubing+fitting anew.
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dshavers
Senior Member


Joined: 28 Jun 2013
Posts: 23
Location: Alameda,CA
Expertise: Just starting

Espresso: Starbuck Barista
Posted Mon Sep 9, 2013, 5:42pm
Subject: Re: Possible UKLA pump issues
 

Thanks for the info. I'll have to look up the specs. Assuming they are the same for 3/8 and 1/8 fittings. I was just happy to see a steady pressure on my portafilter gauge, so I can at least get a ballpark of what pressure I'm pulling my shots at. I'm assuming if my gauge is reading 10 bar with a tiny amount of leakage, then I must be getting at least 9 at the puck with an actual shot.



iko Said:

Pesky copper compression fitting eh? Careful, if they're too tight, they also leak. The specs for 1/4 compression fitting is 1 and 1/4 turns after hand tight. But... if you got a leaky one, although the spec doesn't recommend it, you can open the fitting and either use a few turns of teflon plumber's tape on the olive, or a little teflon paste. A great number of people have solved a leaky fitting that way, when one cannot afford to redo the whole tubing+fitting anew.

Posted September 9, 2013 link

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iko
Senior Member


Joined: 30 Aug 2013
Posts: 58
Location: Toronto
Expertise: Just starting

Posted Mon Sep 9, 2013, 6:00pm
Subject: Re: Possible UKLA pump issues
 

dshavers Said:

Thanks for the info. I'll have to look up the specs. Assuming they are the same for 3/8 and 1/8 fittings. I was just happy to see a steady pressure on my portafilter gauge, so I can at least get a ballpark of what pressure I'm pulling my shots at. I'm assuming if my gauge is reading 10 bar with a tiny amount of leakage, then I must be getting at least 9 at the puck with an actual shot.

Posted September 9, 2013 link

This is one example where the 1 and 1/4 turns is mentioned, but I found it in several other places.

http://www.imperialsupplies.com/pdf/Section_F.pdf

I am positive you get enough pressure at the puck if you got 10 bar with a blind filter basket. One other thing that you need to pay attention is having enough water in the tank and run enough water through the system before testing the pressure, so that the pump is primed well.
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dshavers
Senior Member


Joined: 28 Jun 2013
Posts: 23
Location: Alameda,CA
Expertise: Just starting

Espresso: Starbuck Barista
Posted Mon Sep 9, 2013, 6:10pm
Subject: Re: Possible UKLA pump issues
 

yeah I always prime the pump with 4oz through the steam wand and then 4oz through the group : )




iko Said:

This is one example where the 1 and 1/4 turns is mentioned, but I found it in several other places.

http://www.imperialsupplies.com/pdf/Section_F.pdf

I am positive you get enough pressure at the puck if you got 10 bar with a blind filter basket. One other thing that you need to pay attention is having enough water in the tank and run enough water through the system before testing the pressure, so that the pump is primed well.

Posted September 9, 2013 link

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