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Dissassembly + Repair Guide - Keurig B70 Platinum : Single Serve Coffee Machines

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Dissassembly + Repair Guide - Keurig B70 Platinum

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Dissassembly + Repair Guide - Keurig B70 Platinum

Postby switch998 » Fri Nov 12, 2010 7:25 pm

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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby jbviau » Fri Nov 12, 2010 9:43 pm

Now that's what I call an epic first post! Welcome, and thanks. Out of pure greediness, could I ask if you might have a few pics?

p.s. I understand more clearly now why Keurig just replaces these rather than repairing them...
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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby switch998 » Fri Nov 12, 2010 10:01 pm

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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby tinninches » Fri Nov 12, 2010 10:06 pm

-Jayson-
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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby switch998 » Fri Nov 12, 2010 11:06 pm

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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby bcichowlas » Sat Nov 13, 2010 3:00 pm

How timely!

The problem with mine was indeed that the motor was a bit jammed. I got to the point in your procedure where I was supposed to be using a flashlight to somehow get the upper cover off. I did remove the two screws for the upper cover, but didn't get further than that.

Fortunately, with a little bit of prying and sliding a screw driver between panel pieces, I got the side panel up a bit, enough to access the screw that holds the motor in. I really wasn't in the mood for desoldering either, but I dismounted the motor removed the pump piece and twisted the white piece with the hole on the end of the motor shaft. At first, it turned hard but then it turned easier. That seemed very encouraging. So, to put in a slight more effort, I undid two screws that hold the bracket piece to the motor. I discovered an additional hole into the motor, though which I could sometimes see the windings as I slowly turned the motor. I took a small screw driver and gently poked in and out of that hole to try to remove or dislodge dirt. Then I'd turn the shaft past the next winding and try to clean with the screwdriver again. At the end, I could give the motor a twist and it would continue to spin for a revolution or so.

Then, it was time to reassemble things and, as often is the case with me, I had a few screws left over at the end. Getting the bottom plate in place was a little tough and so was getting the arm cover on in the right position.

Since the machine had claimed it needed descaling, I had most recently had vinegar in the system. I didn't see any signs of dirt or obstructions in the tubing and I was really hoping I wouldn't have to prime the pump with water in some way.

When I put it back together, it was now happy to pump the vinegar through the system for the descaling process. Then I pumped through a tank of water, a cup at a time, as they suggested in their descaling process. Then I made a cup of coffee. The color looked great, but yecch! As they said, sometimes it takes more than one tank of water to get rid of the vinegar flavor. However, each cup seems to be a consistent volume. (It wasn't before.) So after another rinse or two, I hope to have my morning coffee at 2PM in the afternoon.

Thanks,
Bruce
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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby jbviau » Sat Nov 13, 2010 3:20 pm

Open question for the tinkerers: Could the machine be upgraded with more reliable parts? It's great that you can do repairs, but what about a more permanent fix?
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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby switch998 » Sat Nov 13, 2010 3:37 pm

You need a 12V 4 PSI pump air pump with the tube hole at the bottom, the diameter is 1/2" i think. The KPM27C is a compatible pump, since the machine (at least mine) doesn't run the pump at 12V, you can get specs for the 6V version of the pump here: http://www.clarksol.com/html/prodspecsKPMRPump.cfm

The problem is that the water will run back down the tube and rust the pump, so I think a one way valve could be used on the tube to prevent this from happening.
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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby maryob » Wed Nov 17, 2010 4:49 am

Perhaps you could buy broken machines for next to nothing if they are cosmetically damaged. Strip for parts and sell as repair parts with your directions. It could be a huge markup just like any parts business,
Mary
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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby 68KANE » Fri Jan 21, 2011 10:32 pm

If you have two units, is it possible to replace the control panel without completely tearing this apart? Has anyone even tried taking one of these control panels out of a B70? I have a broken machine (pump issue) that's pristine and one that works great but the control panel is cosmetically damaged.

TIA
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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby donb » Tue Feb 22, 2011 2:44 pm

I have my malfunctioning Keurig apart while the new one that Keurig gave me makes my coffee. Is there anywhere an explanation of how this machine functions ? There are lots of parts but on mine no obvious defects. I am a retired EE with lots of time and curiosity. I have looked up Keurig for Patents and see some cited ones of interest, but it would be nice to see a simple explanation of what all these parts do.

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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby donb » Thu Feb 24, 2011 4:59 pm

OK: I have found a basic description of how the parts of the Keurig machine work together. The patent listing on the bottom of the carton lists a few that include a general system description.

From what I can see, my symptoms were consistent with a malfunctioning air pump. I will tackle that first.

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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby donb » Mon Mar 07, 2011 1:50 pm

Yup: The air pump would not rotate with voltage applied. Would not rotate after I took it out and apart. Reason is the shaft and bearing are heavily corroded. There was some water in the pump section next to the motor bearing - obviously not designed for a wet environment. The pump diaphragm looked intact at a quick glance.

List price on pumps at Clark solutions is $15. The little motor looks like a 50 cent item, if I knew where from.

Don b
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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby bigbbri » Tue Mar 22, 2011 12:37 am

Hi, I read this post and it was very helpful in assisting me when I took apart my B70. Turned out the 12 volt valve at the very top of the unit. I called Keurig today to see if they would send me a replacement part and they said no. They did replace the entire unit though! The Keurig was purchased in 12/2009 and I never registered it. They took down a lot information but then came back and said they were shipping a new unit and to return the K-cup portion of the machine. If anyone can use a part I won't mind sending to you.
Thanks again for sharing information,
Brian
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Re: Dissassembly + Repair Guide - Keurig B70 Platinum

Postby jbviau » Tue Mar 22, 2011 7:03 am

Welcome, Brian! Glad to hear it.
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