Our Valued Sponsor
OpinionsConsumer ReviewsGuides and How TosCoffeeGeek ReviewsResourcesForums
Espresso: Espresso Mods and Restorations
rebuilding Duetto II steam valve
Coffee Kids
Help folks who help folks in coffee producing nations.
coffeekids.org
 
Not Logged in: Log In to Postlog in
New Topics updated topics   New Posts new posts   Unanswered Posts new unanswered  
Search Discussion Board search   Discussion Board FAQ faq   Signup sign up  
Discussions > Espresso > Espresso Mods > rebuilding...  
view previous topic | view next topic | view all topics
showing page 1 of 2 last page next page
Author Messages
emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 2,959
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Mon Nov 26, 2012, 6:59pm
Subject: rebuilding Duetto II steam valve
 

Does anyone know if one needs to lube any of the parts in the Duetto II steam valve?  I've got mine apart as it's been dripping slowly from inside the wand.  There are no o-rings inside of the valve, it's compression fittings, springs and a single rubber plunger between the feed line from the boiler and the knob/wand assembly.  I'm thinking some small particle got stuck between the plunger and the line at the T...and that it just needed cleaning.

Thanks in advance!

EDITED:

I got some advice from Randy Glass (frcn) last night and applied a little lube to the shaft of the plunger at the spring. I also contacted Jason at Chris' Coffee and he sent me a photo of an insert at the knob that likely came loose, which I will follow up on tonight.  Having taken the valve apart and played with it quite a bit last night, I'm pretty sure Jason's thought is right on target.

I'll post a followup and some photos, once I get this all squared away, in case anyone else runs into the same problem.

 
.
Always remember the most important thing is what ends up in your cup!
back to top
 View Profile Link to this post
calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,672
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Tue Nov 27, 2012, 10:56am
Subject: Re: rebuilding Duetto II steam valve
 

Good luck, a food safe grease likely will not hurt anything but if it is in the water / steam path, it will quickly become washed away and into your drink. If it is where a shaft passes through a seal, more than likely it will stay just fine and help more than it may hurt the situation.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
back to top
 View Profile Visit website Link to this post
emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 2,959
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Wed Nov 28, 2012, 3:32pm
Subject: Re: rebuilding Duetto II steam valve
 

Followup, as promised (no photos YET)...

So last night I reinstalled the OEM knob, powered up the machine, let it come to full temp (thermal stability) and prepared 2 lattes and two cappas.  Jason was spot on about the loose insert and all is working perfectly.

I fixed the custom knob today and am letting the thread sealant cure before installing it tomorrow.  I snapped a couple of more photos for the posts to come...

 
.
Always remember the most important thing is what ends up in your cup!
back to top
 View Profile Link to this post
emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 2,959
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Wed Nov 28, 2012, 5:48pm
Subject: Re: rebuilding Duetto II steam valve
 

Here's the valve opened up,  The plunger (on the left) has a rubber tip that contacts the inside of the other fitting when the valve is in closed position.

emradguy: steam valve 001c.jpg
(Click for larger image)

 
.
Always remember the most important thing is what ends up in your cup!
back to top
 View Profile Link to this post
emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 2,959
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Wed Nov 28, 2012, 5:50pm
Subject: Re: rebuilding Duetto II steam valve
 

Here's a better view of the rubber insert.  You can see a faint ring where the contact is made at closed valve position.

emradguy: steam valve 002c.jpg
(Click for larger image)

 
.
Always remember the most important thing is what ends up in your cup!
back to top
 View Profile Link to this post
emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 2,959
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Wed Nov 28, 2012, 5:52pm
Subject: Re: rebuilding Duetto II steam valve
 

Here's a view of the inside of the machine side fitting of the valve (the plunger is in the knob side).  You can see how the rubber insert gets its faint ring when the valve is closed.

emradguy: steam valve 004c.jpg
(Click for larger image)

 
.
Always remember the most important thing is what ends up in your cup!
back to top
 View Profile Link to this post
emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 2,959
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Wed Nov 28, 2012, 5:56pm
Subject: Re: rebuilding Duetto II steam valve
 

Here is the OEM knob installed.  There is a brass washer that sits over the shaft and a small retaining clip locks into the groove near where the shaft protrudes through the knob.  Notice the flat brass surface where the washer would be sitting.  It is actually an insert that screws into the threads of the knob's core.

emradguy: steam valve 013c.jpg
(Click for larger image)

 
.
Always remember the most important thing is what ends up in your cup!
back to top
 View Profile Link to this post
emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 2,959
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Wed Nov 28, 2012, 6:00pm
Subject: Re: rebuilding Duetto II steam valve
 

This knob has a loose insert, and if you look closely, you can see how there's no room for the brass washer below the groove and the retaining clip cannot be put on easily.  To put the retaining clip on, the plunger must be pulled out slighty with pliers - essentially opening the valve.  Thus, the loose insert causes the valve to leak, so water drips out of the wand.

emradguy: steam valve 016c.jpg
(Click for larger image)

 
.
Always remember the most important thing is what ends up in your cup!
back to top
 View Profile Link to this post
emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 2,959
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Wed Nov 28, 2012, 6:01pm
Subject: Re: rebuilding Duetto II steam valve
 

Here's the knob with the insert removed.

The insert has tiny grooves in the wall of the inner circle, enabling one to use a flat head screwdriver to remove it.  However, they really are tiny and I found it easier to do this with needle nose pliers while it was loose.  I did use a screwdriver during the reinstall with thread lock sealant (see later post).

emradguy: steam valve 019c.jpg
(Click for larger image)

 
.
Always remember the most important thing is what ends up in your cup!
back to top
 View Profile Link to this post
emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 2,959
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Wed Nov 28, 2012, 6:02pm
Subject: Re: rebuilding Duetto II steam valve
 

...and here's a photo of the insert inverted, so you can see it's threading.

emradguy: steam valve 021c.jpg
(Click for larger image)

 
.
Always remember the most important thing is what ends up in your cup!
back to top
 View Profile Link to this post
showing page 1 of 2 last page next page
view previous topic | view next topic | view all topics
Discussions > Espresso > Espresso Mods > rebuilding...  
New Topics updated topics   New Posts new posts   Unanswered Posts new unanswered     Search Discussion Board search   Discussion Board FAQ faq   Signup sign up  
Not Logged in: Log In to Postlog in
Discussions Quick Jump:
Symbols: New Posts= New Posts since your last visit      No New Posts= No New Posts since last visit     Go to most recent post= Newest post
Forum Rules:
No profanity, illegal acts or personal attacks will be tolerated in these discussion boards.
No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum.
No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek.
No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum.
Who Can Read The Forum? Anyone can read posts in these discussion boards.
Who Can Post New Topics? Any registered CoffeeGeek member can post new topics.
Who Can Post Replies? Any registered CoffeeGeek member can post replies.
Can Photos be posted? Anyone can post photos in their new topics or replies.
Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts.
Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.
Home Espresso Machines
Watch videos with Gail & Kat, Rocket, Jura Capresso, Saeco, Rancilio, Quick Mill, Nespresso
www.seattlecoffeegear.com
Home | Opinions | Consumer Reviews | Guides & How Tos | CoffeeGeek Reviews | Resources | Forums | Contact Us
CoffeeGeek.com, CoffeeGeek, and Coffee Geek, along with all associated content & images are copyright ©2000-2014 by Mark Prince, all rights reserved, unless otherwise indicated. Content, code, and images may not be reused without permission. Usage of this website signifies agreement with our Terms and Conditions. (0.315886974335)
Privacy Policy | Copyright Info | Terms and Conditions | CoffeeGeek Advertisers | RSS | Find us on Google+