Question about KitchenAid KSM90 Ultra Power Series Stand Mixer

3 Answers

Recalibrating of brushes

My children removed the brushes from the side and now the unit will not turn on what can i do to recalibrate since the closest service center is 4 hours away

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  • originalkayo Apr 30, 2009

    Thank You! I had the same problem and I was at my wits' end because my mixer is over 20 years old and I love it so much. It has worked perfectly month in and month out on everything from dough to cookies to cake to you name it. I stupidly forgot to lock in the bowl this morning for the first time ever and it jammed. The machine wouldn't restart after I unjammed it. I took the brushes out, thinking that might help, but I didn't know what I was doing. I must have reinserted them wrong and I tried these solutions and now it restarted and I am so grateful and happy! Thank you so much--this site is invaluable.

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You don't need to guess- get a flashlight and look in the hole.  You'll see a small piece of metal in each- on one side it's upper left, the other lower right.  Put in the brush so that the notch is on the same side at the piece.  If this does not work, swap sides.  This worked first time for me.

Posted on Nov 18, 2007

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Our KitchenAid was dropped on its side and the Speed Control lever was bent. I took out the brushes and the screws to see if I could pull it all apart but I soon realized I couldn't get the motor housing off. I bent the Speed Control lever back so it moved and I put the brushes back and it didn't work either.

Thank you to those who posted especially edremy, I rotated the brushes so that the notch in the brush lined up with the small little notch in the hole and the mixer works perfectly now. Thanks a ton.

Posted on May 02, 2009

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Try swapping the brushes side to side, and/or turning them over, they seat against the sides of the rotor, and if you put them back in wrongly, they won't match up to the curve and make good contact.

Posted on Oct 20, 2007

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2 Answers

Well, I was attempting to replace my speed lever. In the process I removed the back cap (electrical circuit board) and the two screws on the side (flat, springs with magnets attached). After I replaced...


Hello Lora,

I understand that you took you speed lever out to replace it and you took the brushes out of each side of the unit. The reason that the unit will not start is more than like the brushes are not installed the proper direction.

1. Unplug the machine
2. Shine a light in the hole on the hole on the side of the unit. You will notice a notch or a piece sticking out.
3. Take one of the brushes (magnet looking things) put the notch and the cut out in the same corner.
4. Repeat the samething with the other side.
5. Plug in and check and see if it runs

This should solve your problem with the brushes. IF you have any more questions about this mixer please post it to this discussion.

THank you for choosing FixYa.com

Justin

Mar 13, 2011 | KitchenAid KSM150PS Artisan Series Stand...

1 Answer

I have a kitchenaide mixer and now it will not turn on


Remove those plastic caps again and this time remove the brushes from the side of the mixing head. Inspect the curved surface of the brush and clean any carbonized flour from the surface - be careful not to damage the surface of the carbon brush.

When replacing the brushes make sure they go in the correct way - there is only one way, the brushes will not go in far enough if they are in the wrong orientation. Trial and error works, watching how far in the brushes go. once you have found the correct position, the brush will go in 1/4 inch further than the other three positions.

Apr 01, 2010 | KitchenAid 32685 Mixer

1 Answer

We purchased a KitchenAid Plus 275 in 2006. Used it once then packed it for storage since we moved several times. Tried to use it today, will no turn on.


The easiest thing to check is the brushes. There are two large "buttons" on the sides of the mixer. They have a large slot in them. You can use a quarter to stick in the slot and turn the button counterclockwise. Once removed you will see a spring sticking out. Now this is important. On the other end of the spring is a small carbon bar (the brush) which is square and about half an inch long. Note that there is one corner of the carbon bar, the brush, which is removed forming a flat on that corner. Note the position of the flat so that you can replace the brush in the same position. If you don't then the brush will not contact the armature and the unit will never run!

Once removed examine the end of the brush to see if there is some crud on it, most likely charred flour. Carefully scrape the crud off the brush and re-insert it remembering the above . . .make sure it slides easily into position. If it is sticky then remove it again and clean out the brass hole with a q-tip.

Do this to both brushes and the unit will most likely run.

Of course make sure the outlet you are using has power to it!!

If it still doesn't run then there is a problem with the phase control board or the motor.

Mar 28, 2010 | KitchenAid K45SS Classic Stand Mixer

1 Answer

I have an Epicurean KitchenAid Mixer. It does not


The easiest thing to check is the brushes. There are two large "buttons" on the sides of the mixer. They have a large slot in them. You can use a quarter to stick in the slot and turn the button counterclockwise. Once removed you will see a spring sticking out. Now this is important. On the other end of the spring is a small carbon bar (the brush) which is square and about half an inch long. Note that there is one corner of the carbon bar, the brush, which is removed forming a flat on that corner. Note the position of the flat so that you can replace the brush in the same position. If you don't then the brush will not contact the armature and the unit will never run!

Once removed examine the end of the brush to see if there is some crud on it, most likely charred flour. Carefully scrape the crud off the brush and re-insert it remembering the above . . .make sure it slides easily into position. If it is sticky then remove it again and clean out the brass hole with a q-tip.

Do this to both brushes and the unit will most likely run.



Of course make sure the outlet you are using has power to it!!

If it still doesn't run then there is a problem with the motor control board or the motor.

Mar 28, 2010 | KitchenAid KT2651X Epicurean Stand Mixer

1 Answer

Worked fine, then didn't- getting power


The easiest thing to check is the brushes. There are two large "buttons" on the sides of the mixer. They have a large slot in them. You can use a quarter to stick in the slot and turn the button counterclockwise. Once removed you will see a spring sticking out. Now this is important. On the other end of the spring is a small carbon bar (the brush) which is square and about half an inch long. Note that there is one corner of the carbon bar, the brush, which is removed forming a flat on that corner. Note the position of the flat so that you can replace the brush in the same position. If you don't then the brush will not contact the armature and the unit will never run!

Once removed examine the end of the brush to see if there is some crud on it, most likely charred flour. Carefully scrape the crud off the brush and re-insert it remembering the above . . .make sure it slides easily into position. If it is sticky then remove it again and clean out the brass hole with a q-tip.

Do this to both brushes and the unit will most likely run.

Of course make sure the outlet you are using has power to it!

If it still doesn't run then there is a problem with the control board or the motor.

Mar 27, 2010 | Food Mixers

1 Answer

Just stopped working, likemit was not plugged in.


The easiest thing to check is the brushes. There are two large "buttons" on the sides of the mixer. They have a large slot in them. You can use a quarter to stick in the slot and turn the button counterclockwise. Once removed you will see a spring sticking out. Now this is important. On the other end of the spring is a small carbon bar (the brush) which is square and about half an inch long. Note that there is one corner of the carbon bar, the brush, which is removed forming a flat on that corner. Note the position of the flat so that you can replace the brush in the same position. If you don't then the brush will not contact the armature and the unit will never run!

Once removed examine the end of the brush to see if there is some crud on it, most likely charred flour. Carefully scrape the crud off the brush and re-insert it remembering the above . . .make sure it slides easily into position. If it is sticky then remove it again and clean out the brass hole with a q-tip.

Do this to both brushes and the unit will most likely run.

Of course make sure the outlet you are using has power to it!

If it still doesn't run then there is a problem with the control board or the motor.

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1 Answer

I took out the side bolts and removed the top, now have no power to unit. did I put it back wrong? Problem I needed to address was the paddle was too low and scraping the inside of bowl. Help with both...


sm_schedule, the side bolts you removed were, in fact, the brush holder caps, and if you remove the brushes, you cut off the power to the electric motor (armature). I suspect that one or both of the brushes is (are) not seated properly. Did you remove the brushes to replace them or were you just inspecting them? I'd suggest removing them again and make sure the concave contact face of the brushes are resting completely on the armature. If you've turned a brush 90 degrees too much, it wont' seat properly. As far as adjusting the mixer head so that it doesn?t droop, this should be pretty easy to fix if you?ve got a small blade screw driver and a small hex driver (or jewelers screw driver). First, do you still have the KSM90 Parts List? If not, you can download a PDF version from the KA website. Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number (in your case, use KSM90P) and select one of the files that appear under Parts List. Turn to page 4 - Case, Gearing and Planetary unit, which shows the exploded view diagram and locate Illus. Nos. 29 & 30. Page 5 lists the parts as Adjusting Screw and Set Screw respectively. What?s probably happened is that over 12 years of operation, the vibrations from your mixer has caused the set screw to loosen and drop, hence the lower mixer head. Both screws will need to be ?adjusted? to move the head back to its original position. Now the problem is removing the head from its pedestal. Turn to page 8 and gently remove Illus. No. 7, Hinge Pin, with a hammer and pin driver. With the hinge pin removed the mixer head and pedestal can be separated and you should have access to adjusting and set screws. I would inspect them for wear and tear, and replace them, if you deem appropriate. It may take a few trial reassemblies to get the mixer head back to the original factory position, but once there, everything should be OK. I hope this helps! Howard, Burke, VA

Oct 21, 2009 | KitchenAid KSM90 Ultra Power Series Stand...

1 Answer

I removed the Side springs ( Brushes) and not the unit wont start


You sure boo boo'd. Just kidding It's important that the brushes go in the same way they came out and in the same holes because of the contact patter and curvature wear. The trailing edge of the brush is longer than the lesding edge Which is which? If you were totating something clockwise, the 12 would be the lesding edge and the one would be the trailing. So, the longer of the wear curvature would go on the one(1) side and the shrter towards the twelve. Now, how do you know which way it was rotating? The commutator is the part the brushes ride on, Those copper bars. Look closely and you can tell bby the black tracings which was the leading of rotation. There is usually mor on tracings ontrailing edge of the bar so. The trailing edge of the brush would be on the same side as the black tracings on the copper bar. Of course, Unplug it before messing with it. and make sure the brushes are seated and not binfing in the holder. Use an attachment to rotate the motor once or twice(unplugged) in order to set the brushes. Good Luck, Ned

Sep 24, 2009 | KitchenAid K45SS Classic Stand Mixer

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Kitchenaid ultrapower ksm90


Yes, First unplug the unit.On either sides of the mixer there are two black motor brush retainer screws. Carefully remove them paying attention to the motor brush keyed position.You will see that one side is keyed.Check to see if the brush is competely worn down,or possibly cracked ( replace ).Always reinstall brushes the same way they came out.This should solve the problem.

Nov 03, 2007 | KitchenAid KSM90 Ultra Power Series Stand...

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