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Removing the Boiler Level Probe From an Oscar
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SyracuseCoffee
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Joined: 5 Mar 2014
Posts: 28
Location: Syracuse
Expertise: I like coffee

Espresso: NS Oscar
Grinder: Compak K3
Posted Sat Apr 26, 2014, 6:50am
Subject: Removing the Boiler Level Probe From an Oscar
 

I'm trying to install a vacuum breaker, but unfortunately it won't fit under the solenoid when I try to put it on the steam wand line.  So I'm trying to move the level probe to the boiler connection closest to the solenoid and then put the vacuum breaker and steam wand to the middle port.  But holy thread locker!  I cannot break the seal on the lock nut holding the level probe.

Has anyone tried removing the wire level probe and plastic sleeve and then heat the lock nut with a propane torch?  I might loose some insulation but I don't really care at this point.

Has anyone tried an impact wrench?  I thought about getting a long socket and borrowing my bother-in-laws impact wrench.
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SyracuseCoffee
Senior Member


Joined: 5 Mar 2014
Posts: 28
Location: Syracuse
Expertise: I like coffee

Espresso: NS Oscar
Grinder: Compak K3
Posted Sat Apr 26, 2014, 5:24pm
Subject: Re: Removing the Boiler Level Probe From an Oscar
 

Never mind.  Impact wrench did the job.  Lots of thread lock compound was used.
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,726
Location: Riverside, Ca, U.S.A.
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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 Mon Apr 28, 2014, 7:34am
Subject: Re: Removing the Boiler Level Probe From an Oscar
 

UH, I added a vac breaker to an Oscar and it was very simple, no relocating of anything. Just tap into the copper line that runs from the boiler, over the frame to the front of the machine. Done.

 
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SyracuseCoffee
Senior Member


Joined: 5 Mar 2014
Posts: 28
Location: Syracuse
Expertise: I like coffee

Espresso: NS Oscar
Grinder: Compak K3
Posted Mon Apr 28, 2014, 9:19am
Subject: Re: Removing the Boiler Level Probe From an Oscar
 

That was my plan too.  Not sure why my vacuum breaker hit the solenoid valve body.  I checked the general position of the boiler which looked OK and the group head plumbing lined up well and the boiler was positioned on it's shelf properly.  The "tilt" wasn't noticeable until I placed the vacuum breaker assembly onto the steam opening that I noticed the slight tilt which was enough to hit the solenoid.

Maybe I "bent" the boiler opening somehow when removing the steam line lock nut.  But the lock nut actually came off without too much issue, so I don't think so.  Anyway problem solved but it was a PITA making my easiest modification quite a bit more work than anticipated.

I guess different machines that are of the same model can still have their individual quirks.
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SyracuseCoffee
Senior Member


Joined: 5 Mar 2014
Posts: 28
Location: Syracuse
Expertise: I like coffee

Espresso: NS Oscar
Grinder: Compak K3
Posted Mon Apr 28, 2014, 10:14am
Subject: Re: Removing the Boiler Level Probe From an Oscar
 

You got me thinking again about the vacuum breaker on the boiler steam port.  I took a top-down view directly over the vacuum breaker.  It's obvious from this perspective that the steam port was simply not going to work for my Oscar.  I guess there may be a fair amount of hand assembly during the manufacture of these machines that (in some respects) can give each machine slightly different characteristics.

SyracuseCoffee: Vacuum Breaker Topdown Markup.jpg
(Click for larger image)
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j_bravo14
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Joined: 11 May 2014
Posts: 6
Location: IL
Expertise: I love coffee

Posted Sun May 11, 2014, 11:51pm
Subject: Re: Removing the Boiler Level Probe From an Oscar
 

Just asking the experts here, but what do i gain from adding vacuum breaker on the oscar?
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DanoM
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Joined: 20 Mar 2013
Posts: 357
Location: Los Angeles
Expertise: I love coffee

Espresso: Bezzera Strega, '84 La...
Grinder: Compak K10, Kludge grinder,...
Posted Mon May 12, 2014, 6:36am
Subject: Re: Removing the Boiler Level Probe From an Oscar
 

j_bravo14 Said:

Just asking the experts here, but what do i gain from adding vacuum breaker on the oscar?

Posted May 11, 2014 link

Vacuum breaker works great when you put your machine on a timer.  This will ensure that the machine can both suck in air to the cooling boiler when the machine is turned off, but as it warms up it also vents much of the dry air from the boiler so the machine heats up qucker.  (Some people call the dry, heated air "false pressure.")

If you intend to use a timer for your Oscar then it's a very good mod.  If you turn it on, come back 30-40 minutes later, bleed the steam valve, and then wait another 10 minutes you'll not need the vacuum breaker.
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