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Espresso: Espresso Machines
Old Gaggia Evo  - brass T modded to OPV.
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Kristi
Senior Member
Kristi
Joined: 6 Oct 2005
Posts: 2,286
Location: Boston
Expertise: I love coffee

Espresso: Gaggia Evo w silvia wand
Grinder: Macap M4 mod to d&s-less
Roaster: (Jeff at Redbirdcoffee)
Posted Tue Jun 4, 2013, 5:21pm
Subject: Old Gaggia Evo  - brass T modded to OPV.
 

I post it here as I am a long time poster here and this is an easy cheap ($0) way to get an OPV on a non-solenoid Gaggia.
I take no responsibility if you mess it up! :D  ymmv.

Pictures at  here

When it comes from the factory it is set at a high value and can only be adjusted upward, as the threads at the end of the adjuster tube are flattened.
I sawed off the last barb (and the offending flatened threads), and snipped off a bit of the spring and put it back together.  2 tries netted me 200psi and 140psi.  You will find the adjustment a bit coarse due to the stiffness of the spring - a lower coeficient spring could be substituted.  If the adjuster vibrates out, simply put it back in with a few wraps of teflon tape.
  Enjoy!

 
#--> I recommend Eric Svendson's adapter and thermometer for E61s (also Silvia) : easy surfing!
# My photo albums have moved to     http://picasaweb.google.com/krislema2
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dana_leighton
Moderator
dana_leighton
Joined: 11 Jan 2002
Posts: 1,944
Location: Fayetteville, AR
Expertise: I live coffee

Espresso: Isomac Relax; Caferina...
Grinder: Macap MXK; Baratza Vario-W;...
Vac Pot: Yama 5-cup
Drip: Technivorm; CCD; Melitta
Roaster: Poppery I w/PID controller
Posted Tue Jun 4, 2013, 6:37pm
Subject: Re: Old Gaggia Evo  - brass T modded to OPV.
 

try this link

 
Dana Leighton - Espresso hack and CoffeeGeek moderator
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Kristi
Senior Member
Kristi
Joined: 6 Oct 2005
Posts: 2,286
Location: Boston
Expertise: I love coffee

Espresso: Gaggia Evo w silvia wand
Grinder: Macap M4 mod to d&s-less
Roaster: (Jeff at Redbirdcoffee)
Posted Tue Jun 4, 2013, 7:03pm
Subject: Re: Old Gaggia Evo  - brass T modded to OPV.
 

Thanks Dana!  It didn't work when I did it...  Must have done something wrong...

 
#--> I recommend Eric Svendson's adapter and thermometer for E61s (also Silvia) : easy surfing!
# My photo albums have moved to     http://picasaweb.google.com/krislema2
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 View Profile Link to this post
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