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Gaggia TE Rotary pump low pressure
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pinkpotato
Senior Member


Joined: 25 May 2011
Posts: 22
Location: Manchester
Expertise: I love coffee

Espresso: Gaggia TE Gaggia XD
Grinder: Iberital MC5/Cunill brasil
Posted Wed May 25, 2011, 9:46am
Subject: Gaggia TE Rotary pump low pressure
 

Hi
Ive recently upgraded to the gaggia TE commercial machine, previously i had a basic consumer machine.

However ive noticed whenever i engage the rotary pump to pour a shot my pressure on the gauge only goes up to 4.5/5.0 bar where i believe it should be 9 bar.

Ive already tried adjusting the the adjustment screw on the side of the pump fully in and fully out yet it had no effect???

Any ideas?
Thanks

 
Gaggia TE 1 Grp Gaggia XD 1 grp Gaggia TE 2 Grp (Restoring) Iberital MC5
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fnacer
Senior Member


Joined: 25 Feb 2007
Posts: 463
Location: Denver
Expertise: I love coffee

Espresso: Salvatore E61, Vivaldi Mini...
Grinder: Mazzer Mini, Gaggia MDF,...
Roaster: Behmor 1600
Posted Sat May 28, 2011, 5:01pm
Subject: Re: Gaggia TE Rotary pump low pressure
 

If the machine has one, you'll want to check the OPV valve. If it's set to 5 bars, it will cause water to be diverted from the group to the drain so only 5 bars reach the group. The way to check for this is to look for clear water flowing into the drain while you are pulling the shot.
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Jarviscochrane
Senior Member


Joined: 15 May 2011
Posts: 27
Location: Toronto
Expertise: Just starting

Espresso: Livietta, Cremina
Grinder: Compak K6, Kyocera CM-45
Posted Sat May 28, 2011, 7:57pm
Subject: Re: Gaggia TE Rotary pump low pressure
 

Is that 4-5 bars measured against a blind portafilter basket?

Rotary pumps require positive input pressure - usually 1-2 bars.  If your machine is plumbed in you should check your input pressure. If you are drawing from a tank (i'm not sure if this model has a onboard reservoir or not) you may want to consider a flojet to raise input pressure.

In addition to the previous reply re: OPV, also try to verify your guage is reading correctly by measuring brew pressure with a separate portafilter guage. There are a number of DIY portafilter guage threads using commonly available fittings. Mine has become an invaluable diagnosis tool.
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pinkpotato
Senior Member


Joined: 25 May 2011
Posts: 22
Location: Manchester
Expertise: I love coffee

Espresso: Gaggia TE Gaggia XD
Grinder: Iberital MC5/Cunill brasil
Posted Fri Jun 3, 2011, 2:36am
Subject: Re: Gaggia TE Rotary pump low pressure
 

Hi thanks for the replies, ive already tried blanking off the line to the opv and it made no difference. Also i tried a different gauge (not a blind portafiter one) but where i diconnected the opv  i stuck a gauge on the end and it read the same pressure. Also my input water pressure is good 2-2.5bar. Ive tried lots of things, i think it might be the pump itself so ive ordered a new fluid o tech one from happy donkey as the original gaggia pump in the machine has a mfr date of 2001 :P

 
Gaggia TE 1 Grp Gaggia XD 1 grp Gaggia TE 2 Grp (Restoring) Iberital MC5
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vogelsimon
Senior Member


Joined: 28 Jul 2005
Posts: 3
Location: England
Expertise: I love coffee

Posted Tue Jul 19, 2011, 6:34am
Subject: Re: Gaggia TE Rotary pump low pressure
 

Any joy with the new pump?
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pinkpotato
Senior Member


Joined: 25 May 2011
Posts: 22
Location: Manchester
Expertise: I love coffee

Espresso: Gaggia TE Gaggia XD
Grinder: Iberital MC5/Cunill brasil
Posted Mon Oct 28, 2013, 2:11pm
Subject: Re: Gaggia TE Rotary pump low pressure
 

Just realised i never responded to this and as i've re entered the forum community i might as well tell everyone that yeah the new pump worked a treat and we got it nicely adjusted to 9 bar with the screw and lock nut on the side. We've been making delicious coffee ever since and love the machine.

Since i moved out about 6 months ago i've been suffering without it using the families old magimix domestic machine, hence the recent purchase of my gaggia xd and new grinder which are larrrrrvely! :D

 
Gaggia TE 1 Grp Gaggia XD 1 grp Gaggia TE 2 Grp (Restoring) Iberital MC5
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