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Gaggia OWC - (Very Old) Old White Coffee - new mods
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zazz
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Joined: 5 Jul 2012
Posts: 24
Location: GA
Expertise: I love coffee

Posted Mon Jul 9, 2012, 5:36am
Subject: Re: Gaggia OWC - (Very Old) Old White Coffee - new mods
 

thanks for the info.  what size tap did you use to relocate the water inlet fitting?  For plugging the existing hole did you use a brass plug?

I am still cleaning up the boiler, the brown coating has still not come off fully.  still a small amount of scaling.  I will be putting it back together today to see how it runs.
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AndyPanda
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AndyPanda
Joined: 12 Jul 2010
Posts: 769
Location: San Francisco Bay Area
Expertise: I love coffee

Espresso: Olympia Cremina, Various...
Grinder: Mazzer Major, Fiorenzato,...
Vac Pot: vintage Corey
Drip: AeroPress
Roaster: BreadMachine/HeatGun
Posted Mon Jul 9, 2012, 7:43am
Subject: Re: Gaggia OWC - (Very Old) Old White Coffee - new mods
 

Just take out the brass fitting and take it with you to the hardware store to match the size and threads.  Yes a brass plug.
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zazz
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Joined: 5 Jul 2012
Posts: 24
Location: GA
Expertise: I love coffee

Posted Mon Jul 9, 2012, 9:36am
Subject: Re: Gaggia OWC - (Very Old) Old White Coffee - new mods
 

Thanks again. I put it back together and made a dispersion plate out of aluminum and the shower screen works much better, but does not trickle like yours, I will to drill out the hole once I get a chance. Tested it just to see and no channeling, just comes out faster
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AndyPanda
Senior Member
AndyPanda
Joined: 12 Jul 2010
Posts: 769
Location: San Francisco Bay Area
Expertise: I love coffee

Espresso: Olympia Cremina, Various...
Grinder: Mazzer Major, Fiorenzato,...
Vac Pot: vintage Corey
Drip: AeroPress
Roaster: BreadMachine/HeatGun
Posted Mon Jul 9, 2012, 11:33am
Subject: Re: Gaggia OWC - (Very Old) Old White Coffee - new mods
 

zazz Said:

made a dispersion plate out of aluminum and the shower screen works much better, but does not trickle like yours

Posted July 9, 2012 link

Remember I also have a dimmer on the pump.  That pump in the OWC is a brutal beast and puts out much higher flow than a lot of newer pumps.  I leave it running on about 1/3 to 1/2 power --- so that is another reason why my shower screen dispersion looks so nice in the video.  It also saves on your ears - that OWC pump is LOUD.  Much easier to listen to when running on the dimmer at half.
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zazz
Senior Member


Joined: 5 Jul 2012
Posts: 24
Location: GA
Expertise: I love coffee

Posted Mon Jul 9, 2012, 3:07pm
Subject: Re: Gaggia OWC - (Very Old) Old White Coffee - new mods
 

ah yes, i'll have to try that out as well since i plan on using it in my office. thanks again for such good work on this machine and documentation.
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zazz
Senior Member


Joined: 5 Jul 2012
Posts: 24
Location: GA
Expertise: I love coffee

Posted Thu Jul 12, 2012, 8:08am
Subject: Re: Gaggia OWC - (Very Old) Old White Coffee - new mods
 

so far i've done the dispersion disk, drilled out the exit hole, and added a dimmer.

I tried it before with the dimmer and the pump goes really slow, it seems that the water comes out of the shower screen for a bit then is either sucked back in or just stops. It will start up eventually but sometimes will gurgle (this is at the dimmer about half way). I cannot get a steady flow every time if the pump is less than full power.  I have not tried it after drilling out the hole, will try that today.  Any ideas?
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ribozymer
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Joined: 2 Jan 2011
Posts: 15
Location: San Francisco, CA
Expertise: Just starting

Grinder: Rocky Rancilio (working on...
Posted Thu Mar 7, 2013, 12:50pm
Subject: Re: Gaggia OWC - (Very Old) Old White Coffee - new mods
 

I was looking at options of putting in a permanent temp and pressure gauge on the same machine.  Any clue on what the hex nut on the bottom of the 3 way solenoid is for?  Part #10 in the diagram?  I have a suspicion I might be able to thread in a dual temp and pressure gauge after backing out that nut.  

Click Here (www.partsguru.com)
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chomal
Senior Member


Joined: 18 Jul 2013
Posts: 1
Location: South Korea
Expertise: I love coffee

Posted Sun Aug 18, 2013, 6:31pm
Subject: Re: Gaggia OWC - (Very Old) Old White Coffee - new mods
 

I recently got an OWC from ebay and it's in good condition. :)

I want to ask you a simple question.
With what did you block your standpipe?
I'm considering block it with a small brass bolt or 1/8 in. brass plug.

What do you recommend?

And I have a plan to do a mod after you.

  1. brass sheet dispersion disc  - I can get 1.0, 1.2, 1.5, 2.0 cm and etc. Which one is best?
  2. standpipe blocking
  3. light dimmer
  4. thermostat change to 107C
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