Question about Braun KSM 2 Electric Blades Grinder

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Braun KSM1 XXU coffee grinder stuck 'ON'

For no apparent reason, my (older) coffee grinder today simply remained ON when I released the 'grind' button. I see no easy way in to the working parts to de-clog or clean out the stuck switch. The problem appears not to be outside the casing.

How do I get access without damaging the grinder. I love it.

Model No: 4024 755854 KSM1 XXU 120V a.c. 40-60 cps/1.1 amps
Made in West Germany!

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  • esadok Sep 25, 2008

    I had a similar problem. Cleaned out the excess coffee inside the grinder using an old tooth brush. Unfortunately, I dislodges a little plastic piece that is part of the on/off switch mechanism.

    Does anyone have a parts diagram showing how this on/off swich is assembled?



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The little plastic piece is part of the spring tension for one motor brush. It has been re-installed. I no longer need any assistance.

Posted on Sep 25, 2008

  • esadok Sep 25, 2008

    The base of the coffee grinder can be removed and the bottom of the coffee grinder cleaned out with an old tooth brish.


    1) Mark the orientation of the base and the body of the grinder. Place a piece of masking tape on the body (near the base) and another piece of masking tape on the base. Using a pencil or pen to draw a line across the two pieces of tape. This will show how the base and body must be re-assembled after the cleaning is done.

    2) Using a Philips screwdriver, remove the two screws on the bottom of the coffee grinder.

    3) Carefully pull back the base to reveal the motor and on/off switch (attached to a plastic piece).

    3a) The plastic piece pushes against a wire on the motor body. The wire makes contact with one of the motor wires. It is a simple mechanical operation. There is no physical "on/off" switch as one would expect to see.

    4) Use an old tooth brush to brush out loose coffee that has been deposited inside the grinder.

    5) Put the base back onto the body, aligning the two pencil/pen marks.

    6) Screw back the two Philips screws.

    7) Try the grinder to see if this cleaning out allowed the plastic piece (in the switch mechanism) to move freely down and up, to turn "on" and turn "off" the grinder.

    8) If the above does not work, then the coffee grinder has to be dis-assembled more completely to gain access to the plastic piece that is part of the mechanical switch assembly.

  • C Kali
    C Kali Dec 03, 2012

    Hi, is there anyway to replace this part? I have an old KSM 1 with the internal "off/on" plastic part which snapped so I cannot operate it any longer when I twist the cap.



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