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Venus Pump Starts then Dies
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redratto
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Joined: 21 Sep 2012
Posts: 1
Location: Boson
Expertise: Just starting

Posted Fri Sep 21, 2012, 3:55pm
Subject: Venus Pump Starts then Dies
 

I had the Venus for about 3 years and love the machine.  Over the past year however I have has problems with getting it to run.  Basically, the pump stops working when the machine runs.  The problem happens when I load the machine with coffee and run it.  The machine produces about one espresso after which the pump stops working.  You can still hear the pump but the pressure goes to zero and no water is being pumped.  I have cleaned the machine, descaled it, checked the water level, etc.  If I turn off the machine for about an hour, letting it cool down, and then restart it, I can again make about one espresso before the problem reoccurs.  So far I have replaced the Shaft Steam Valve and the O Ring with no success.  I've been thinking of replacing the TAP for bypass (nr 25 on Stefano's diagram) but am not sure if that will help.  Any advice, recommendation, is appreciated.    

Cheers,
Rasmus
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,947
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 Mon Sep 24, 2012, 5:33am
Subject: Re: Venus Pump Starts then Dies
 

Off the top of my pointie head, I would say the check valve in the pump is going bad, this is part of the pump and as little as the pump costs, I would replace the pump as a unit.

The pump works like a vibrator connected to a rubber diaphram. The inlet and the outlet of the chamber each have one way valves. The one on the inlet lets water into the chamber but not out while the outlet lets it out and not back in from the brew/boiler side. If either of these valves leak then the pump just makes noise and no water flows or flows very weakly.

 
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Wayne P.
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Feed the newbs, starve the trolls and above all enjoy what you drink!
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