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Espresso: Espresso Machines
Pump questions???
Rocket R58 Double Boiler
Rocket Espresso R58 Double Boiler -  Everything you need for the perfect shot!
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Gaggia_guy87
Senior Member


Joined: 15 Dec 2013
Posts: 2
Location: Montreal
Expertise: I love coffee

Posted Sun Dec 15, 2013, 2:05pm
Subject: Pump questions???
 

So...

i bought few weeks ago a used Gaggia Evolution from some women on kijiji. She said that she got it 3 years ago as a gift and rarely used it. When i arrived at home i've plugged it in and find out that the group was completely jammed with calcium and coffee. So i opened up the whole thing and clean it. Right now, the boiler and the group are completely clean and functional but I still cannot get a good shot from the machine. However, i've noticed that the pump, even though it seems to work well, is quite noisy comparing to my friend's machine. My pump makes a quite loud and seems to knock on something while it vibrates but i've checked it and tried to replace it on it mount, i even grabbed it with my fingers while it was running to be sure it wasn't knocking on something and still, didn't change the sound.

So, i've checked in my friend's machine to see his pump (he has a Gaggia Evolution as well), and saw that he has the Orange Pump (CP3A 52W 120V/60Hz). His machine makes a certain noise but it's not annoying , it's a nice smooth rattle. I have the Ulka EAX5 52W 120V/60Hz. And by searching on the web i've found out that the Evolution come with the Ulka EP5.

So... my questions are... Does someone knows the difference between those pumps? Which one is better? Is the EAX5 is supposed to be louder than the CP3A?


Matt

P.S. I Saw on my pump that it is 6 years old... it was made in 07. Is it old?
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D4F
Senior Member


Joined: 15 Mar 2012
Posts: 2,026
Location: USA
Expertise: I like coffee

Espresso: Gaggia Classic PID
Grinder: Baratza Forte-AP
Posted Sun Dec 15, 2013, 9:09pm
Subject: Re: Pump questions???
 

Welcome to CG.

Gaggia has used both pumps at times.  I think the orange one is old, but I don't see a date for that machine.  It is Invensys

Click Here (www.aet-us.com)

ULKA are here and the specs.

Click Here (www.ulka.it)

The pumps are basically interchangeable in terms of use. I can't verify that the actual mount is the same, but probably will fit.  As far as noise, there are variables. My ULKA is quieter as it pumps against load or back pressure.  It seems quieter with the reservoir tank full but there is less work to input water then.  Much of the noise on my Classic is the drain pan and cover and if I damp that out, less noise. Noise is inherent in the vib pumps.  Iv you open the steam valve and catch the water from the steam wand and group, what is the water volume in say 15 seconds.  Healthy pumps put out about 10 ml/sec if no back pressure.

Hope that help, at least to get you started.

 
D4F also at
http://www.gaggiausersgroup.com/
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Gaggia_guy87
Senior Member


Joined: 15 Dec 2013
Posts: 2
Location: Montreal
Expertise: I love coffee

Posted Tue Dec 17, 2013, 4:26pm
Subject: Re: Pump questions???
 

Well i got about 125ml in 15 sec by the group without portafilter and about 140ml by the steamwand
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D4F
Senior Member


Joined: 15 Mar 2012
Posts: 2,026
Location: USA
Expertise: I like coffee

Espresso: Gaggia Classic PID
Grinder: Baratza Forte-AP
Posted Tue Dec 17, 2013, 4:34pm
Subject: Re: Pump questions???
 

My post may have been unclear.  Usually if the steam wand is open some water may still come out the group.  I was asking for total water out of both together in 15 seconds.  If you meant it that way, that is 265 ml out in 15 seconds.  Still if those are individual runs, the volume is not bad. Total out for a pump should be about 150 - 160 ml/15sec.  600ml/min plus.

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