KitchenAid KSM90 Ultra Power Series Stand Mixer Logo
John N Posted on Dec 16, 2012

The speed lever on my KSM 90 won't lock in the off position.

I've got the mixer apart apart, but don't know how to fix it.

1 Answer

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  • Contributor 6 Answers
  • Posted on Dec 22, 2012
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Do you have a manual? You can download one from Kitchen Aid, small appliances. There should be a schematic and how to that will help.

4 Related Answers

Anonymous

  • 235 Answers
  • Posted on Jul 29, 2010

SOURCE: The kitchenaid speed lever is bent and jammed

Hi TIMDEIST, I hate it when you drop your mixer... they’re really not designed for gravity testing. Let’s see what you can do to get it fixed and operable again. The good news is that this can be fixed quite easily (OK, maybe a little effort) by yourself, if you are a DITY type person, feel adventurous, and your mixer is not under warranty. Be sure you 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> then enter the visitor type “Consumer and enter the 6 character model number, in this case K45SSW, and then select the file under Parts List (1) K45SSWH0.pdf (341.41 KB) (definitely check to see it this matches your mixer).
Although not providing step by step instructions, the Parts List manual provides an exploded view of the various component assemblies allowing you to see how the mixer all fits together. It is helpful for the disassembly, troubleshooting, and reassembly of your mixer.
Turn to pages 6 & 7, titled “Motor And Control Parts”, and locate Ill. Nos. 1, 2, 3, & 4. #3 is your Switch Lever and stud. If you can’t straighten it out then you will need to replace it. It might also be a good idea to check and see if anything else might be out of alignment due to the sudden stop when it was dropped.
As far as parts go, here are five potential vendors in no particular order: RepairClinic.com; mendingshed.com; searspartsdirect.com; partstore.com; and Grainger.com (for grease). Prices can vary widely between vendors, so do some comparison shopping. Here are some links to several excellent websites that detail the disassembling/greasing and reassembly of a KA Mixer.
Finally, 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, fix/replace your Switch Lever, and reassemble your mixer.
Good luck, I hope this helps. Howard, Burke, VA
If this solution was helpful, please rate it, thanks! – hslincoln

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Anonymous

  • 1 Answer
  • Posted on Oct 25, 2010

SOURCE: My mixer wont turn off...the speed lever wont stay

i have this same problem!! mine is less than a yr old. im upset that i paid so much for this problem. love the mixer but dang, this shouldnt be happening.

woobie dog

woobie dog

  • 1273 Answers
  • Posted on Oct 20, 2011

SOURCE: My mixer would only stay on fastest speed now it won't go on at all. Anybody know what it could be and if it can be fixed?

Hi Debbie, W/D here.
You can certainly repair this mixer yourself. You will need an exploded diagram, and will need to tear it down to locate and replace the damaged part(s). In your mixer, there are two parts that sound suspect. They are the control plate and the control board, numbered #36 and #39 in the diagram (link) that follows. The link that I'm directing you to is very user friendly; you can toggle back and forth between the various drawings and see everything that goes into making a mixer. It's not very complicated to work on. You can use the diagrams as a guide to getting to the parts. Here are a few things to consider, if this is something unfamiliar to you: 1. Print the schematics, and make notes on the schematics as you go. 2. Use a sharpie to mark terminals as to the color of the wires connecting to each. Pictures and sketches are even better, making re-assembly a snap. A cell phone camera may be good enough. You can also mark wires by using painter's tape and a sharpie, showing what connects to where. I generally use all of the above, and it serves me well. The reason to tear it down to the parts mentioned is that there are several versions of each part in the diagram. There is a picture of each part in the parts list, so you will be able to readily identify your part. Also, you may be able to visually determine which part is defective. Since each part runs in the $30 range, you can save some money if you can see that one part shows signs of damage, and the other doesn't. If you can't determine which one it is, replace both. Keep all of the parts that you remove together.
Make sure that the power is OFF before making any attempt to repair/tear down/re-assemble the mixer.
Here's the link. Best regards and good luck, --W/D--
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=239779&diagram_id=28194300#d28194300

Anonymous

  • 16 Answers
  • Posted on Oct 23, 2011

SOURCE: I don't have a problem I just wanted to know

Except for asthetics and whatever obvious trim such as handles on bowls, etc, there is NO PRACTICAL DIFFERENCE; both mixers are outstanding appliances.

There has always been ONGOING MODIFICATIONS in motor design, relating mostly to formation of the electromagnetic flux and other intangibles, you will find OLDER KSM90s may have a slightly higher degree of OVERBUILDING- such as COPPER plating flashed on the back end of the carbon brushes to improve effciency, reduce heat, and lower electricl resistance, another example is oil wick felts included with the rear bearing assembly to help lubrication on older models. In both cases its over-engineering and it costs money- Ive never been able to read difference between the two carbon brushes on a Watt meter in actual use, nor have I ever actually seen, in more than 30 years mostly as authorized warranty service center more than just one single WORN rear bearing (from a mixer in a science lab, not a kitchen) with or without the oil wick felt- thats out of several hundred thousand mixers!

Newer mixers lack other similar accoutrements which had proven to provide limited tangible benifit on a practcal level.

KitchenAid keeps knowledgeable staff available at their 800 phone line at customer service to go into this subject without the unnecessary technical depth I've given,, and they may yet recall my name after these many years -DeSantis (Im the [disabled] son, JD2, not the grandson)- from the Trenton/central NJ area.

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The kitchenaid warranty is exactly 365 days from date of registration "No Questions Asked" on day 366 you have no warranty and you gotta pay.
Now the good news; first check the wall socket, I know it works but check it anyway. then check your plug, did you step on it while you were working on the machine? The plug often falls to the floor during work and can get underfoot, you may have broken the plug it'self. next you will need a parts list for your model from Kitchenaid's website.
http://www.kitchenaid.com/customer-service/manuals/
My first suggestion is to try a minor adjustment of the speed control switch, they often get out of sync when you do something to the machine. You can find several videos of this on the youtube site. "Adjusting the speed control switch on kitchenaid mixer"
If the two or one of the top 2 screws on the speed control switch move it can shut the machine down just like an on/off switch. Did you remove the back cover during your adjustments? Did you remove and replace the carbon brushes on the side of the machine while working on the machine? If you did you might have put them back in incorrectly, if you did they will also act a a shutoff switch. If you did not take them out then DON"T as there are four ways to put the brushes back in and only one way is correct and there are two brushes to deal with. Has work ever been performed on the mixer before? Because if all you did was to adjjust the beater height screw then nothing should have effected the normal operation of the mixer. So if there is anything that you did but did not include in your description of work you performed then please let us know. We strive to give accurate solutions but... as I am a KA tech I do not have any other solutions with out the machine in front of me. Just so you know you can fix this yourself.
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I took mine apart completely and reassembled everything and greased everything and mine is doing the same thing. I'm thinking, also, that it is the tightening of the top lock nut.
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I don't have a problem I just wanted to know the difference between the two products. I have the KSM 90 and nothing is wrong with it. I just wanted to know how much of a difference between the two. ...

Except for asthetics and whatever obvious trim such as handles on bowls, etc, there is NO PRACTICAL DIFFERENCE; both mixers are outstanding appliances.

There has always been ONGOING MODIFICATIONS in motor design, relating mostly to formation of the electromagnetic flux and other intangibles, you will find OLDER KSM90s may have a slightly higher degree of OVERBUILDING- such as COPPER plating flashed on the back end of the carbon brushes to improve effciency, reduce heat, and lower electricl resistance, another example is oil wick felts included with the rear bearing assembly to help lubrication on older models. In both cases its over-engineering and it costs money- Ive never been able to read difference between the two carbon brushes on a Watt meter in actual use, nor have I ever actually seen, in more than 30 years mostly as authorized warranty service center more than just one single WORN rear bearing (from a mixer in a science lab, not a kitchen) with or without the oil wick felt- thats out of several hundred thousand mixers!

Newer mixers lack other similar accoutrements which had proven to provide limited tangible benifit on a practcal level.

KitchenAid keeps knowledgeable staff available at their 800 phone line at customer service to go into this subject without the unnecessary technical depth I've given,, and they may yet recall my name after these many years -DeSantis (Im the [disabled] son, JD2, not the grandson)- from the Trenton/central NJ area.
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Obtain a copy of the Repair Part List for your model from Kitchenaid.com.
Download a Copy of the Kitchenaid Service manual.

http://www.kitchenaidparts.be/centers/servicemanual/mixer.pdf

First, you may want to adjust the mixer's speeds:

1. Loosen the lock nuts enough & Turn the 2 top screws clockwise until they cannot be turned
anymore. Leave the bottom screw alone for now.
2. Use a dab of white paint or paper whiteout to mark the positions of the Phillips screws.
3. Plug in your mixer and Set the speed selector to "Stir".
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Keep making one full turn at the time (for both left and right) until the motor starts running.
5. Put your hand near the Agitator shaft and allow it to brush your finger slightly. Use your
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For your reference, the planetary RPM's for the 5-qt. tilt-head Artisan Stand Mixer are as follows:
Stir speed - 60
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Speed 4 - 135
Speed 6 - 180
Speed 8 - 225
Speed 10 - 280

Second, if the mixer won't run:
Remove the Control Plate Assembly (36), the Phase Control Board (39)
and the motor Governor Assembly (35). Inspect for loose connections,
burnt or damaged components. If they seem to look OK, re-assemble
them and test the mixer. If the motor still won't run, then I might suspect
a defective Phase Control Board (39).
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Get A Copy of the Repair Parts List from Kitchenaid.com
Make sure the Speed Lever and and the Speed Link are in place
and operating smoothly. The two Large black screws you are referring to
are the Motor Brushes Caps. The Carbon Brushes are keyed and
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All you have to do now is adjust the mixer speeds (if necessary):

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1. Loosen the lock nuts enough & Turn the 2 top screws clockwise until they cannot be turned
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2. Use a dab of white paint or paper whiteout to mark the positions of the Phillips screws.
3. Plug in your mixer and Set the speed selector to "Stir".
4. Turn each top screw One full turn couterclockwise (alternating between Left and Right)
Keep making one full turn at the time (for both left and right) until the motor starts running.
5. Put your hand near the Agitator shaft and allow it to brush your finger slightly. Use your
watch or clock and start counting the number of times the shaft touches your finger in
60 seconds. The correct count should be 60 RPM (Rounds Per Minute). If it is less
or more than 60, give each screw 1/4 turn counterclockwise or clockwise and start counting
again. Now tighten both lock nuts.
6. Set the speed selector to "6" and turn the bottom screw either clockwise or counterclockwise
to achieve a speed of 180 RPM.

For your reference, the planetary RPM's for the 5-qt. tilt-head Artisan Stand Mixer are as follows:
Stir speed - 60
Speed 2 - 95
Speed 4 - 135
Speed 6 - 180
Speed 8 - 225
Speed 10 - 280
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Hi BROOKLYNX. To answer you primary question, no there is no special speed control knob lock that you?ve inadvertently triggered. OK, so without a lock why?s your speed control knob stuck? It most likely that something broken inside your mixer to lock it into position. I wouldn?t continue to operate your machine as you are doing. It?s not good for the electric motor, the electric cord or the plug. It would be better to determine the root cause of your control knob?s obstinacy. The inspection and troubleshooting of the inside of your mixer is a DITY capability, particularly if your mixer is out of warranty. Just 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: http://www.kitchenaid.com/flash.cmd?/#/page/home. Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number, in your case, try K45SSW, 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, along with all the parts. You?ll want to focus on part #s 2, 3, 4, 5, and 6, which is our speed control assembly. Check to see if something isn?t blocking you?re the movement of #3. You should be able to determine if something has broken. If something has broken, you can order replacement parts and install yourself. 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. Once apart you can check for any other unseemly wear and tear on the gears, etc. It can be messy but quite gratifying to diagnose and repair your mixer yourself. Finally, here's a link to an excellent site that details the disassembly and replacement of a mixer's grease, which might be helpful, too. http://www.foodonthefood.com/food_on_the_food/2009/04/how-to-repair-a-kitchenaid-mixer-yourself.html Good luck and have fun. I hope this helps. Howard, Burke, VA If this solution has helped you, please rate it, thanks! - hslincoln
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I need help in correctly reassembling my Kitchenaid KSM 150 mixer. I used the help on the web to successfully take apart, clean and regrease my mixer. However, I have not yet been able to successfully...

First dissconnect the power supply.Next, the locking hook must be facing towards the back of the unit. However the lever itself must be placed inside the bottom portion of the unit going out to the side. Next you need to connect the metal link to the lever and UNDERNEATH the locking hook. Once you have done this you can now put the screw in to hold down the lever. Your one speed problem could be caused by the adjustment screws that are connected to the main board at the bottom. if these are not set correctly and most importantly EVENLY the mixer wont operate correctly. The next possible solution is that the main control board is faulty and would have to be replaced part number for the board is w10119326. Also I have added this link from Whirlpool that you can use. Hope this helps. Thanks
http://www.whirlpoolparts.ca/parts/fspShow.php?model=KSM150PSWH0

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If you find that It cannot be repaired. I suggest you look at other brands to replace it, as Kitchenaid is now owned by Whirlpool Corp. and the quality of the Kitchenaid line is not what it once was when they were built by Hobart.

Goto www.consumeraffairs.com and review the different mixer's pros and cons. Good luck! ricardok45
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