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Discussions > Espresso > Machines > Pump Issue?  
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grumpybarista
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grumpybarista
Joined: 19 Feb 2007
Posts: 226
Location: Detroit
Expertise: I live coffee

Espresso: LP Pub1
Grinder: Mazzer Mini w/ doser, NS...
Vac Pot: Yama 5-cup
Drip: French Press, aeropress
Roaster: Behmor 1600
Posted Wed Jun 20, 2012, 8:19am
Subject: Pump Issue?
 

Machine: La Pavoni Pub 1 (heat exchanger; plumbed in water and drain; filtered and softened)

Issue: pump sounds as if not pumping - can't tell if it's not turning (haven't opened it yet). Water pressure shows ~4 bar whether pump runs or not, ie, the brew switch is activated. Water does come out but not at typical pressure. Heating up normally, and steam pressure is okay.

I'm due to open the machine and give it a good cleaning, but this issue came up recently and it seems odd. Not sure if the pump is plugged or burned out...

Any suggestions as to what it could be. As I said, I'll be opening it up soon, anyway, but if you've got an idea what to test for, I do appreciate the advice.

Thanks
Phil

 
Phil

www.coffeeporn.net
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,854
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Wed Jun 20, 2012, 10:11am
Subject: Re: Pump Issue?
 

It sounds like 4 bar is your line pressure and that the pump isn't working at all.
Is this a new thing or has the machine been in storage for a while?
It could be electrical but it also may be a stuck pump.

The only way to know is to open her up!

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

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chrisbruin
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Joined: 27 Jul 2010
Posts: 62
Location: Los Angeles
Expertise: I love coffee

Espresso: Astoria Compact CKXE,...
Grinder: Nuova Simonelli MDUA, la...
Drip: teavana pot, french press
Roaster: caffe rosto, popcorn popper,...
Posted Wed Jun 20, 2012, 10:41am
Subject: Re: Pump Issue?
 

I just changed the pump on my astoria compact and it was having similar problems.  My pump sounded like it was working but it the water flow was real low.  There were also times when only steam would come out of the grouphead.  I thought It was running hot but instead there no water being pumped through.  The water tap was working decently so I kept ruling out the pump but it was the pump.  The machine is working great now
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grumpybarista
Senior Member
grumpybarista
Joined: 19 Feb 2007
Posts: 226
Location: Detroit
Expertise: I live coffee

Espresso: LP Pub1
Grinder: Mazzer Mini w/ doser, NS...
Vac Pot: Yama 5-cup
Drip: French Press, aeropress
Roaster: Behmor 1600
Posted Wed Jun 20, 2012, 12:02pm
Subject: Re: Pump Issue?
 

calblacksmith Said:

It sounds like 4 bar is your line pressure and that the pump isn't working at all.
Is this a new thing or has the machine been in storage for a while?
It could be electrical but it also may be a stuck pump.

The only way to know is to open her up!

Posted June 20, 2012 link

Yes, it's just the line pressure, and it's not jumping up to the typical 9 bar when the brew switch is on. I'd been using it daily for over a year. When I hit the brew switch, however, it does "sound" like the pump wants to work. That is, I can hear it try to pump, but it doesn't sound like normal when it was working and pumping okay. It kind of sounds stuck, as you say.

Time to open it up. Next question: is it possible to "unstuck" a pump? Or am I looking at a new pump?

To be honest, I'm looking forward to this project. I wanted to give it a good acid bath, which I've done before on another machine, and this will now teach me a little more about the pump aspect to the machine.

 
Phil

www.coffeeporn.net
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chrisbruin
Senior Member


Joined: 27 Jul 2010
Posts: 62
Location: Los Angeles
Expertise: I love coffee

Espresso: Astoria Compact CKXE,...
Grinder: Nuova Simonelli MDUA, la...
Drip: teavana pot, french press
Roaster: caffe rosto, popcorn popper,...
Posted Thu Jun 21, 2012, 4:15pm
Subject: Re: Pump Issue?
 

I took apart the pump in my machine first and tried to fix it to no avail and then just replaced it.  Its the 70 watt fluid-o-tech pump in my machine.  I dont see how it can hurt to try and check it out first ....if it doesnt work you still need to buy a new pump.

I think you could unstick it.....there might be scale in there and there are some springs and a ball most likely that could have some obstruction.
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grumpybarista
Senior Member
grumpybarista
Joined: 19 Feb 2007
Posts: 226
Location: Detroit
Expertise: I live coffee

Espresso: LP Pub1
Grinder: Mazzer Mini w/ doser, NS...
Vac Pot: Yama 5-cup
Drip: French Press, aeropress
Roaster: Behmor 1600
Posted Thu Jun 21, 2012, 7:45pm
Subject: Re: Pump Issue?
 

chrisbruin Said:

I took apart the pump in my machine first and tried to fix it to no avail and then just replaced it.  Its the 70 watt fluid-o-tech pump in my machine.  I dont see how it can hurt to try and check it out first ....if it doesnt work you still need to buy a new pump.

I think you could unstick it.....there might be scale in there and there are some springs and a ball most likely that could have some obstruction.

Posted June 21, 2012 link

Thanks. I'm going to have to wait until next week sometime, but I'm guessing I'll have to replace it, too. But I will look at it first and see what's what.

 
Phil

www.coffeeporn.net
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