Question about Hobart N50 Stand Mixer

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Hobart N-50 mixer clangs on 1st and 2nd speed

Hi,
My Hobart N-50 mixer works fine but is noisy on the 1st and 2nd speed (strangely, the 3rd speed seems to not be affected).

This model is powered on with a pushbutton+relay, so it doesn't have an interlock plunger which locks the shift assy when running. So if I gently rotate the shift assy when running (just slightly shift its position, and no changing the speed) then the noise is really attenuated. But when I release it, the gears start to clang again.

Please, could you help me to fix this problem ? Here are some data about this mixer :
Model : N50CE
ML : 134271

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  • flormont Jun 04, 2008

    Hi and thank you very much for your advices AbsoluteServ.

    First I tried to adjust the set screw (which was hidden by a silicon coat), but I have not been able to find a adjusment quiet in both 1st and 3rd speed positions.
    Then I checked for the two screw which hold the cam plate of the shifter handle but they are Ok. Finally I peeked at the grease through the shifter alcove : many gears were visible and clearly not immersed on the grease ... do you think the grease needs to be repacked ?
    If I give you the drawing views specific to the "CE" version, could you help me to dismantle this mixer ?

    Thanks again,
    flormont@gmail.com


  • flormont Jun 08, 2008

    Hi and thank you for your anwser AbsoluteServ.

    The "CE" designation is written on the plate and attached to the model name : N50CE. This model works with a bowl guard and a no-volt safety switch. Here are the drawing views of this version :
    View 1
    View 2

    Yes, I think that if will be a little difficult for me to dismante then to rebuild the unit (especially if it needs to be closed with sealant), but I can try to mix-up the grease through the shifter alcove... it maybe will be possible to add grease by the same way ? And if I can't find Shell Darina 2, do you know if there is equivalent lubricant I can use ?

    Regards, flormont.


  • flormont Mar 25, 2009

    Thank you Andrew for your answer. Since I requested for help here, I learned a lot about N50 mixers and I have sorted out the problem by replacing the grease on the transmission case.
    You are right about the CE label, but fortunately the classic KA bowl fits this model too and can be imported from USA.
    Regards, Flormont

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CE is the marking that shows its european conformant.  I think the difference is mostly in terms of the no volt interlock switch.  This means the KA style N50 bowl won't work with the CE models - too low.

Posted on Mar 17, 2009

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First, as an N-50 gets old, the grease tends to harden and no adjustment will help. Repacking the grease is not incredibly difficult for the average mechanic.

The adjustment -- Look on the bottom side of the planetary towards the column. The is a set screw. It should actually be a set screw on top of a set screw.

Remove the first set screw. Back out the second screw one to two turns. Run the mixer in 1st gear. While it is running adjust the screw to reduce the noise. (Do not force the screw inward, it doesn't really bottom out.) Repeat in 3rd gear. Test in all gears, and repeat the adjust for the best results.

Something else you can look at --- unplug the unit, remove the shifter switch plate, (note the gear selected), check the two screws at the top of the opening in the transmission section.

Also, with a good set of eyes and a flashlight, you can get a peek at the grease.

When you put the plate back on, hold the shifter in the "selected" gear. Good luck, let me know if you need more specific help.

Posted on Jun 04, 2008

  • AbsoluteServ Jun 05, 2008

    I am not familar with a "CE" designation. Maybe the "CE" is the date code it was manufactured. The "ML" or "spec" is the signigicant version of the mixer. But I've worked on MANY N-50s, they're all the same mechanically.



    If you want to quite the unit, it sounds like you'll need to repack the unit. If you have never done this type of work, it may be a difficult task. Another option it to stir or mix-up the grease. If the grease doesn't look liked dried peanut butter, I'll use a wire hanger, stick it around the shifter cam plate and mix the grease back into the works. (Pretty crappy method, but it can help.)



    http://www.fixya.com/support/t552263-new...



    http://www.hobartlink.com/extranet/extra...$File/F43056%20Rev%20A_LK.pdf



    But if you're inclined to take it on, I can answer any of your questions.

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