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Discussions > Espresso > Espresso Mods > Andreja Rotary...  
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Frosted
Senior Member


Joined: 1 Jun 2008
Posts: 20
Location: Seattle
Expertise: I like coffee

Espresso: Dalla Corte Supermini, La...
Grinder: Mazzer Mini, Super Jolly,...
Posted Thu Jun 5, 2008, 5:30pm
Subject: Andreja Rotary Pump
 

Here is a picture (I hope it posts) of a recent project. I put a rotary pump in my Andreja. It has been a very nice improvement. Let me know if anyone wants more details or photos.

Frosted: Back-corner3.jpg
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JollyGreenBucket
Senior Member
JollyGreenBucket
Joined: 3 Feb 2008
Posts: 35
Location: Rogers, AR
Expertise: I love coffee

Espresso: Gaggia Viva (220V)
Grinder: Gaggia MDF
Drip: Bodum French Press
Roaster: Poppery II
Posted Sat Jun 7, 2008, 2:15am
Subject: Re: Andreja Rotary Pump
 

I would love more details.  I take it it is no longer pourover capable?
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CoffeeCarl
Senior Member


Joined: 16 Feb 2005
Posts: 66
Location: Lafayette La.
Expertise: I love coffee

Espresso: Andreja Premium
Grinder: MACAP M4
Drip: Technivorm
Roaster: Hottop & Behmor
Posted Sat Jun 7, 2008, 4:40am
Subject: Re: Andreja Rotary Pump
 

I'd love to replace the vibe pump on mine.
More pictures and details when you have time.

Thanks

Carl
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bobvilax2000
Senior Member


Joined: 15 Apr 2005
Posts: 126
Location: Cincinnati, OH
Expertise: I love coffee

Espresso: Rotary Brewtus
Grinder: Macap MXK, Rocky
Drip: Swiss Gold One Cup
Roaster: Behm
Posted Sat Jun 7, 2008, 9:07am
Subject: Re: Andreja Rotary Pump
 

Did that to my Brewtus. It's a great upgrade. Very sleek, by the way.

I'm curious, did you have to make further adjustments to control flowrate? Mine was fairly huge so I put in a smaller gicleur.

- -Barrett
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Frosted
Senior Member


Joined: 1 Jun 2008
Posts: 20
Location: Seattle
Expertise: I like coffee

Espresso: Dalla Corte Supermini, La...
Grinder: Mazzer Mini, Super Jolly,...
Posted Sat Jun 7, 2008, 10:44pm
Subject: Re: Andreja Rotary Pump
 

Here is another picture with both sides on the machine. This has to be a plumbed connection since the rotary pump sits where the water reservoir was. You can also see that the inlet for the plumbing was added to the bottom. That involved adding 3/8" spacers to the feet. I intend to find new feet that are the proper height, but I haven't gotten around to that. Moving the water inlet to the bottom rather than the back makes a brew-pressure adjustment easier, since there are no longer hoses attached to the back panel, which is all you have to remove to adjust the pump.

To mount the pump/motor I had to construct a platform (stainless-steel) to set it above the plumbing and electrical connections at the bottom of the machine. I wanted to do this mod with a minimum of alteration to the original machine (I only had to drill two extra holes in the frame), so now the platform gave me a greater opportunity to mount the pump/motor in the proper place and not have to reroute a bunch of plumbing and electrical. Using a small 110v motor (the same as in the Vetrano) and a short flange pump, the whole assembly fits nicely side to side. I cut holes in the platform for the pump inlet and outlet hoses to pass through and it is mounted to the base with four screws (two at the back and one on each side). The mount that came with the motor had to be modified (hack-saw and drill) and I mounted it on rubber vibration mounts similar to the ones used on the Vetrano.

I changed all of the original teflon hoses from 5/3mm to 6/4mm (6/4mm fittings are easier to find). I already had a plumb-in kit for the machine. I used the supplied jumper wires for the low water alarm and a supplied wire for an additional motor ground wire that was needed. The kit also had the fitting for the overflow hose to the drip tray.

Sourcing the BSP fittings was a challenge but I did find a very good source that had a much greater selection than the typical espresso parts suppliers. A 3/8" to 1/8" fitting for the pump turned out to be not so common. I put a T-fitting on the pump outlet to attach the brew-pressure gauge and the hose to the boiler and capped the port in the T-fitting from the boiler to the expansion valve where the pressure gauge was previously attached. I then routed the hose from the expansion valve to the drip tray for overflow. All of this was done using my Vetrano as a model. The last thing was fabricating a new panel that goes under the cup warmer panel, since the original was designed to hold the reservoir. I hope this helps, I will post a few more photos. If you want any additional information, let me know.

To answer a question, other than the change in the teflon hose diameter and pump adjustments, I made no additional changes to the flow rate.

Frosted: Back3.jpg
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Frosted
Senior Member


Joined: 1 Jun 2008
Posts: 20
Location: Seattle
Expertise: I like coffee

Espresso: Dalla Corte Supermini, La...
Grinder: Mazzer Mini, Super Jolly,...
Posted Sat Jun 7, 2008, 10:46pm
Subject: Re: Andreja Rotary Pump
 

Here is a top view.

Frosted: Top-cover-off3.jpg
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Frosted
Senior Member


Joined: 1 Jun 2008
Posts: 20
Location: Seattle
Expertise: I like coffee

Espresso: Dalla Corte Supermini, La...
Grinder: Mazzer Mini, Super Jolly,...
Posted Sat Jun 7, 2008, 10:48pm
Subject: Re: Andreja Rotary Pump
 

Here is the new cover I fabricated.

Frosted: Top-cover3.jpg
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mhoy
Senior Member
mhoy
Joined: 4 Feb 2008
Posts: 183
Location: Sunnyvale, CA
Expertise: I love coffee

Espresso: Elektra T1
Grinder: Baratza Vario
Roaster: HotTop KN-8828D
Posted Wed Jun 11, 2008, 6:25pm
Subject: Re: Andreja Rotary Pump
 

Really nice cover, how exactly did you do it? Stainless is a pain to drill....

Mark
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Frosted
Senior Member


Joined: 1 Jun 2008
Posts: 20
Location: Seattle
Expertise: I like coffee

Espresso: Dalla Corte Supermini, La...
Grinder: Mazzer Mini, Super Jolly,...
Posted Wed Jun 11, 2008, 9:00pm
Subject: Re: Andreja Rotary Pump
 

Mark-
I did it very carefully. I made a paper pattern to layout all of the holes, taped it to the stainless and used a center punch to mark the centers so the drill bit wouldn't drift. I bought three high-quality bits (and used two), took my time and used generous amounts of cutting oil. The drill press helped too.
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pumpkinscastle
Senior Member


Joined: 10 Jan 2008
Posts: 247
Location: Cincinnati, OH
Expertise: I live coffee

Espresso: Quickmilll Vetrano
Grinder: Mazzer Super Jolly
Posted Sat Jun 21, 2008, 8:30am
Subject: Re: Andreja Rotary Pump
 

Seeing from yourr profile that you own both, QM Vetrano and the (modified) Andreja Premium, would you say that the latter now feels/performs like the former? Or does it somehow differ? Great modification by the way! I wished I were that handy with such stuff.
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