My KitchenAid - model ksm90 - has a high pitched whining noise - when I beat on high speed. It keeps whining for a second or 2 when I turn it off. The mixer has been wonderful - although is getting quite old. I have probably had it for over 15 years.
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Your description is very incomplete. Does it not start turning until the lever is at position 8 or does it run at high speed from the moment it starts at position 1?
If it's not starting until position 8 then the problem is probably mechanical and will require some parts to be replaced or adjusted.
If it starts on high speed at position 1 then it's likely you need to replace the phase board under the back cover at the top.
Whatever you decide to do check the carbon brushes first as worn out brushes can sometimes create funny speed problems.
Get a Copy of the Repair Part List from Kitchenaid.com. You need to adjust the mixer speeds:
Remove the screw holding the End Cover and locate the three screws from the Control Plate. All three (2 top left and right, and 1 bottom) must be adjusted. Make sure that the Control Plate is not damaged in any way, contacts are not charred or burnt,etc...
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". 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
The KSM90 is very similar to the 5-qt. tilt-head Artisan Stand Mixer. You need to adjust the mixer speeds. Obtain a copy of the KSM90 Repair Part List from Kitchenaid.com. Remove the screw holding the End Cover and locate the three screws from the Control Plate. All three (2 top left and right, and 1 bottom) must all be adjusted. 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". 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
You need a reputable repairman. My gears were stripped after trying to mix a very thick dough. It would only work on high speed. After it was repaired.... I still use it, all the speeds work, and that has been 15 years ago. My mixer was at least 8 years old at the time of the "stripping".
Hi. Lubrication of the planetary is essential for your mixer. If you're still under warranty (1 year) call Kitchenaid for a replacement mixer but don't tell them that you disassembled anything.
If out of warranty, locate Chevron FM ALC EP-2 food grade grease for your mixer AND the planetary.
If you haven't already done so, go to kitchenaid.com, click on customer care, then click on manuals search. Enter your full model # in the search window and locate the parts list for you mixer. Download it, it will assist you with your servicing and will have all the part numbers for your mixer. If you need a new trans housing insist that it be METAL!
I would also remove the transmission cover, inspect it for cracks if it's one of the cheap plastic housings. If you find cracks, you have more problems with potential internal damage caused by these cracks as this housing supports two important gears and shafts. When it fails these gears skip and cause damage to the gear cogs and bearings. Kitchenaid's replacement housing is made of metal. Hopefully all you need is the planetary greased.
If this solution has assisted you, please rate it. Good luck! ricardok45
I have a PDF file entitled "kitchenaid service manual" that I could send you that I got online and can't remember where. If so my email address is [email protected] Send me an email and I'll reply with the PDF enclosed. Otherwise try a google search of the above and you might be able to find it.
It's looks old but covers all the essentials including a wiring diagram
There is only one bearing in the back a an A200, the rear motor bearing. Page 12 -- Otherwise I'd look for something rubbing the motor. (wire, capacitor shield) The two back side covers are easy to remove, two screws each.
If you can unplug the mixer and test resistance between leads of the selector switch. The resistance should vary from high to low as you move the selector from low to high. If cord and all else looks good and switch is bad replace the switch.
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