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Report back on the used Oscar
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Discussions > Espresso > Machines > Report back on...  
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Tobb
Senior Member


Joined: 6 Nov 2013
Posts: 25
Location: DC
Expertise: I love coffee

Posted Sun Nov 10, 2013, 12:21pm
Subject: Report back on the used Oscar
 

I posted a couple days ago about a used Oscar a drive away. Well he dropped his price to $500 and I made the drive. It looks brand new never used. So I believe it was barely used. The insulation looks and feels brand new.

So I fired it up and..
It was telling me that the reservoir was empty. I used the back side of a screwdriver and tapped on each valve that I could see and I reseated the reservoir several times and it started working.

Then the steam and the water smelled terrible or age. I have run about 4 or 5 reservoirs full through it. The water now smells clean but the steam still smells not good. Any quick tips on this?

Also, when I get it up to heat and start a shot with no group on it steams (as expected) but when the water starts to come after it's only like 160 and quickly goes down to 140 before stabilizing. Any ideas where to start on this?

I really think that this machine is barely used. Nothing is going to be corroded or broken. What I expect is stiff rubber parts and possible stuck valves ect. Any advice is appreciated. I am off to spend the afternoon watching football, googling the water stench issue, and reading the boards.

Markarian was right about the law =D

Thanks
Dan
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,014
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sun Nov 10, 2013, 12:30pm
Subject: Re: Report back on the used Oscar
 

You are letting the steam out after 10 mins right?  Then allow it to heat up fully.

Steam: You probably need to drain the boiler.  Not fun.

http://www.youtube.com/watch?v=s8iqxLBvSic

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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Tobb
Senior Member


Joined: 6 Nov 2013
Posts: 25
Location: DC
Expertise: I love coffee

Posted Sun Nov 10, 2013, 12:41pm
Subject: Re: Report back on the used Oscar
 

I have bled the steam line. I have had it on for several hours yesterday and several hours today. I keep flushing and keep steaming hoping to knock the smell out. That does not seem to have any impact on the temp issue.

Thanks for the video! About to watch.

Dan
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,014
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sun Nov 10, 2013, 1:26pm
Subject: Re: Report back on the used Oscar
 

First your pstat might be set too low.  I would up that after you drain the boiler.  


The video shows you how to open the case up  From there you can get the boiler clean out drain open and tip out as much as you can.  You can fill it from the boiler probe with descale solution also let it sit a bit and drain.  

This way you can drain it and tip the water out after opening the case with less risk to the brain than the other oscar descale without complete tear down on youtube.  I don't like that method because it seems like it would be too easy to get water in the brain.  The only descale done on mine was in the link in my sig file where we took everything apart.  But with soft water I think I will only do that every other year.  I think I would just do the boiler clean out this way on the years I don't do the full tear down.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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Tobb
Senior Member


Joined: 6 Nov 2013
Posts: 25
Location: DC
Expertise: I love coffee

Posted Sun Nov 10, 2013, 4:07pm
Subject: Re: Report back on the used Oscar
 

Is there some English documentation out there? I found the Italian stuff. I have the bottom off but I am not sure which is the boiler probe? I am 99% sure on the drain but I would love a diagram that would make me 100%.

Thanks for the help coffeenoobie!
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,014
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sun Nov 10, 2013, 4:49pm
Subject: Re: Report back on the used Oscar
 

The probe is the only one not attached to anything.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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Tobb
Senior Member


Joined: 6 Nov 2013
Posts: 25
Location: DC
Expertise: I love coffee

Posted Sun Nov 10, 2013, 5:32pm
Subject: Re: Report back on the used Oscar
 

I got it drained. Now I am trying to get access to put cleaner in it to get that smell out. Is the boiler probe the only probe with one wire coming from it? Mine is red and its on the top of the boiler. Looks like the probe screws into another bolt that is screwed into the boiler? I unscrewed the first part and got access to the probe but not the boiler. Is the bigger bolt that the probe is in the middle of the one I need to remove to get access?

Thanks!
Dan

edit:
What I was messing with is the low water probe. That the wrong probe? I found the little simply schematic you have in your pics.

edit #2:
Could use the steam out line on the boiler? It looks like a simple compression fitting. Easy off and easy on. Could I pour solution in there?
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,014
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sun Nov 10, 2013, 9:28pm
Subject: Re: Report back on the used Oscar
 

Any of them, the water sensor is normally easy to get to. But what ever works.  Use citric acid.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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Tobb
Senior Member


Joined: 6 Nov 2013
Posts: 25
Location: DC
Expertise: I love coffee

Posted Mon Nov 11, 2013, 6:08pm
Subject: Re: Report back on the used Oscar
 

I got it descaled. Was really easy. I picked up the citric acid at my local indian grocery. There was no scale at all, which is a good thing, and what I expected. And the best part is the stench is gone! Thanks for the help!

Now I think I need a pump but I am not sure. I tried to make a shot, actually three, started with fine grind and got more and more coarse. It was taking 20 to 30 sec to get espressso to start coming out. Each time I was letting all the steam out first.

Then I removed the portafilter and just ran the oscar. I did this test several times. It was never consistence. I would start it and it would blow steam for a few sec to 10 sec. Then sometime it would stop putting anything out for 5 to 10 sec then put water out or it would shower properly then stop the start. If it showered properly for 10 to 15 sec then it would stop putting out water. There was one other stage that would randomly insert where there was water coming out but just 2 or 3 streams.

Is there a better more definitive test for the pump?

Thanks!
Dan
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,014
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Mon Nov 11, 2013, 8:16pm
Subject: Re: Report back on the used Oscar
 

If your water is pulsing out steam you need a 6$ valve from Ns. I documented the thing here.  I can link it tomorrow.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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