Question about KitchenAid KSM90 Ultra Power Series Stand Mixer

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I took off the back cap of a 300 mixer. then pulled out the motor brushes. put it back together and now it wont run. What am i missing?

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Hi, KIMAMABELL, While working on your mixer be sure to have the Parts List manual on hand. If you're lacking one, you can download a PDF version from the KA website at: http://www.kitchenaid.com/flash.cmd?/#/page/home.
Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number, in your case, KSM90P, and select one of the files listed under Parts List (check to see it this matches your mixer model).
Turn to pages 6 & 7, titled “Motor And Control Parts”, which provides an exploded view for the disassembly and reassembly of your mixer’s electrical components, along with all the parts. Locate Illus No 32, Brush holder that includes #18, 20, 21, 22, 23, and 31 which is the brush holder and brush & Spring assembly respectively.
The brushes need to be installed so that they both seat correctly on the armature's commutator and it’s possible when you reinstalled them, one or both brushes were turned incorrectly.
The illustration below shows the correct orientation of the brushes and should allow you to reinstall them with confidence.

I took off the back cap of a 300 mixer. then - 0879ff8.jpg

Here are some links to several excellent websites that detail the disassembling/reassembly of a KA Mixer for your future referennce.

Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able to completely disassemble and reassemble your mixer.
Good luck! I hope this helps. Howard, Burke, VA
If this solution has been helpful to you, please rate it, thanks! - hslincoln

Posted on Apr 30, 2010

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Hi TUBEARS, from what you’re describing, I suspect that one or both of the brushes is (are) not seated properly when you reinstalled them. The brushes need to be installed so that they both seat correctly on the armature's commutator or you won’t get any ‘juice’ to the motor. See the illustration below:
ff450a7.jpg
I'd suggest removing them again and making sure the concave contact face rests completely on the armature’s commutator. If you've turned it 90 degrees too much, it won’t seat properly and you get no power to the motor.
It would also be helpful to have the Parts List manual on hand. If you're lacking one, you can download a PDF version from the KA website at: http://www.kitchenaid.com/flash.cmd?/#/page/home.
Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number, in your case use K45SSW, and select the first file K45SSWH0.pdf (341.41 KB) listed under Parts List (1) and then check to verify this matches your mixer model.
Turn to pages 6 & 7, titled “Motor And Control Parts”, which provides an exploded view for the disassembly and reassembly of your mixer’s electrical components, along with all the parts. Locate Illus No 32, Brush holder assembly that includes Illus. Nos. #18, 21, 22, 23 & 31, and Illus. No. 19, Brush & Spring assembly respectively.
The Parts List illustration along with the picture above regarding the orientation of the brushes should get your mixer powered back up and operational. Good luck! I hope this helps. Howard, Burke, VA
If this solution has been helpful to you, please rate it, thanks! -hslincoln

Feb 20, 2010 | KitchenAid K45SS Classic Stand Mixer

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Hi JIM, Happy New Year! From the symptoms you describe of your sister’s mixer it appears there are a couple of issues that need to be addressed. Issue #1, when your sister found the loose governor counterweights that should have been a clue that the governor needs to be replaced. The counterweights should not come off the governor. From your description that you “put everything back together, the actual mixer runs (but a little too fast on slow)” is an indicator that although everything went back together, the governor is still not functioning properly, so it still should be replaced.
Issue #2, which concerned you more, was “the arcing that is constant on the actual contact points that turn the motor on and off.” The contact points you refer to are the mixer’s electric motor brushes, and although arcing continuously occurs (that’s why the mixer head gets hot during heavy usage) under normal operation, it may be time to inspect and replace the mixer’s brushes; the more worn the brushes, the greater the arcing, which makes it more noticeable while more heat is produced.
Before going too much further, be sure to have your Parts List Manual on hand, too. If you don’t have the original you can easily download a PDF version from the KA website: (http://www.kitchenaid.com/flash.cmd?/#/page/home).
Click on Customer Care>Locate Manuals& Guides> and enter the 6 character model number, KSM150P and select the file: KSM150PSWH0.pdf (773.44 KB) listed for your model that appears under Parts List (61). Check to see that this matches your sister’s mixer model.
Turn to pages 8 & 9, titled “Motor And Control Parts” which provide an exploded view for the disassembly and reassembly of the mixer’s motor and electrical control components. Locate Illus. Nos. 29 and 19, Governor Assembly and Carbon Brush, respectively. These are the parts that I would replace – one governor and two carbon brushes.
As far as parts go, here are four potential vendors in no particular order: RepairClinic.com; mendingshed.com; searspartsdirect.com; partstore.com. Prices for the same part can vary widely between vendors, so do your comparison shopping.
Here are some links to several excellent websites that detail the disassembling/reassembly of a KA Mixer.
Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able to completely disassemble and reassemble your mixer.
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Good luck and have fun. I hope this helps. Howard, Burke, VA
If this solution has been helpful, please rate it, thanks! – hslincoln

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If this solution has helped you, please rate it. hslincoln

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