Question about Braun KSM2-WH Electric Grinder

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I have a problem with the switch. KSM2

I have a problem with the switch. The motor stopped in mid-grind. I dismantled. There are two springy contacts. One makes contact when the switch slider "wedge" pushes it. The other doesn't seem to be connected to anything. An ohm meters shows that both contacts have to be made before the motor draws current.

1) What is the purpose of the second spring contact - opposite the one driven by the switch? Should it be hooked behind the terminal so that it makes permanent contact?
2) How should the small, transparent plastic wedge be ortiented? If shifts when I screw the unit back together..


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It is good to repair the switch but it is best to have it
replaced. You may be able to repair it but the problem
will probably recur. However, you are in the best position to resolve the solution either to repair or replace the switch.

Posted on Oct 04, 2009


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Where can I buy the plastic cap nut that protects the threads on the top of the blade shaft? Mine came off after 15years while grinding beans and is not useable any longer.

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I've owned my Baratza Virtuoso for almost two years. Over the past four months it has started acting up on my when I grind beans with a high oil coating. I tried cleaning it today by running white rice...

First, I'm not a Baratza tech, but I have worked on commercial grinders. You should contact your vendor for service.
*** The following is for information only ***
* check on line for your model parts manual. The diagrams will help you identify the parts needed and should provide instructions on replacing/cleaning the burrs.
* As you've figured out, cleaning with rice is not a good idea.
* Burr plates do get dull and needs to be replaced. Longer grind times and frequent adjustments to get finer grinds is an indication of dull plates.
* The oil in the beans used gets caked up under and on the sides of the burr plates.
* Heavy usage and long grind times will melt the oils and fill every part of the burr chamber and even get into the motor and bearings. I've found oil in the on/off switches and rotary switches.
* The burr plates must be removed and chamber cleaned of all oil residue and beans (rice too). Use a vacuum cleaner and stiff brush to clean. Do not use water or any liquids in the burr chamber. You can clean the burrs in wash water once it's removed from equipment. Dry thoroughly before reinstalling.
* The motor should turn freely by hand (no power!) with nothing hitting the sides or under the plate. If it's difficult to turn or makes grinding or whirling noise. Then the lower plate needs to be removed and cleaned. The motor bearings will need to be replaced if the motor does not turn at all.
* Once cleaned and assembled(without any beans) Power up and check the operation. You should have a motor hum without any clanking or screeching (metal rubbing metal) sounds. Stop and power down if you do. Motor bearings are bad.
* If you get nothing then check the switches. Oil probably got in them. Replace.
* Runs okay? Then set the grinder to a large setting (like drip coffee; Turn on and allow to run while you drop some whole beans into the hopper. Use 1/4 cup or less. This should grind through smoothly.
* Placing another 1/4 cup of whole beans. Turn on grinder again. Just hums without grinding? Power down. Replace motor starter capacitor.
* The capacitor is round and usually attached to the motor like a 'hump' on the side or near the top. If you didn't take it apart then one of the wires in the switching side may be miss wired or loose. Check both for loose and correct wired. Careful around the capacitor as it may still have a charge! The capacitor is used to kick start the motor with it's heavy burr plates.
* If your still having problems with low power. Check the motor for burnt smell as you may have overheated and fried the motor. They usually have thermal resets, but if you kept forcing the reset to keep grinding then the motor is defiantly burnt out.
* Final; if everything is working but your not getting the fine grind setting (you should at least get espresso setting but not turkish) then the burrs are gone. It will only be good for drip coffee.
Aloha, ukeboy57

PS I found a cute video on how to clean the burrs (frequent cleaning)

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1 Answer

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Trying to fix the problem is complicated and would require pics and step by step disassembly? Athe simplest way would be to pick up a switch at a hardware store and put it in line. They are used most commonly for lamps but work well on these small motors.

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1 Answer

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There is food grade oils for just your purposed, greases also. Aplliance parts stores carry it

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So I might just rewire it (very easy to do!) so that it runs the minute it's plugged in, and stops when unplugged. I'll post again after I decide what to do.

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1 Answer

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Back pressure is what blew your boiler.

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