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Rotarty Pump Mod to Expobar Brewtus II
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CAPRI
Senior Member
CAPRI
Joined: 4 Oct 2007
Posts: 68
Location: PALM BEACH COUNTY, FL
Expertise: I love coffee

Espresso: EXPOBAR BREWTUS II
Grinder: Mazzer Mini (Stepless/Doser)
Drip: Cuisinart
Posted Thu Mar 5, 2009, 1:41am
Subject: Rotarty Pump Mod to Expobar Brewtus II
 

Well, I'v been gone awhile, but I will tell you that I finally got the mod done to my Expobar Brewtus II.

I took the plunge and sent my machine off last fall and though I'v been super busy (travel, family stuff) I hav my machine back..I hav been using it for over a month now..and though I hav issues (and can't get a response from WLL, oh wait, I got hung up on by some smart-mouthed kid working for them too) I will say that overall I am happy with the result. The reason I am happy is because of the work of DON, but who no longer is there at Whole Latte Love..and I can't get a response about the continued hissing issue I keep experiencing..I wish he were still there, because no one will return my call(s) nor forward my messages to any person in charge.

It all started last summer with a safety valve that was leaking...after being sent the 'new' part (which was the wrong one) and then a bunch of lame excuses as to why the wrong part was sent, I finally was sent the right part, and after I replaced it, it still leaked...grr.. I was fed up and wondering if something was wrong with my machine so I boxed the whole thing up and sent it in for a general tune up, cleaning, a direct (john guest) connect (goes to a 5 gallon jug under the counter), and the vibrator pump changed out to a rotary pump.

The rotary pump takes some getting used to! I thought it would be a ~lot~ less noisy, too...but it is much faster, and while the pressure will be different, I hav to tell you I recommend this modification. Be prepared to spend $500, but instead of paying over $2K for a Expobar Brewtus 3, you can get your EB2 mod'd and just like new for a lot less.

Make sure you are on top of it though, the added fast-ness means a bit more pressure, which isn't a bad thing, really.

I would recommend the upgrade from vibrator pump to rotary pump, just make sure you are careful about who does it.
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Jmanespresso
Senior Member
Jmanespresso
Joined: 18 Jan 2009
Posts: 2,109
Location: Westchester NY
Expertise: I live coffee

Espresso: Alex Duetto II
Grinder: Compak K10 - Vario
Vac Pot: Yama-SY5/SY8/TCA5
Drip: V60, Beehouse, CCD
Roaster: Hottop B
Posted Thu Mar 5, 2009, 11:18am
Subject: Re: Rotarty Pump Mod to Expobar Brewtus II
 

Thats a really cool mod you did.  I absolutley love the brewtus line.

So, more or less, you have a BrewtusIII-R, give or take a few minor differences.  PID looks different I think, but not too much else.  Performace they're probably pretty close to each other.

How do you like the smoother ramp to pressure over the vibe pump.  If i understand it, the rotary pump doesnt ramp nearly as hard as a vibe pump, so coupled with the pre-infusion of the E-61, Im guessing shot quality can greatly improve with this upgrade.  Could be wrong though.

Kudos,
Jeff

 
Follow Your Bliss

Coffee makes your constantly overcome your prejudices and re-evaluate your own "received wisdoms" when it comes to judging cup flavors. -Tom Owen, SweetMarias
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networkcrasher
Senior Member
networkcrasher
Joined: 7 Jan 2008
Posts: 335
Location: Atlanta
Expertise: I love coffee

Espresso: GS3
Grinder: Nino, M3, SJ, Rocky
Vac Pot: GCBC Yama
Drip: Technivorm
Roaster: Hot Top, Behmor, SC/TO
Posted Fri Mar 6, 2009, 9:56am
Subject: Re: Rotarty Pump Mod to Expobar Brewtus II
 

Jmanespresso Said:

How do you like the smoother ramp to pressure over the vibe pump.  If i understand it, the rotary pump doesnt ramp nearly as hard as a vibe pump, so coupled with the pre-infusion of the E-61, Im guessing shot quality can greatly improve with this upgrade.  Could be wrong though.

Posted March 5, 2009 link

My understanding of Vibe vs Rotary is the exact opposite.  Rotaries come up to pressure very fast while vibe's work their way there.
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