Question about KitchenAid KSM90 Ultra Power Series Stand Mixer

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Speed of mixer

While mixing candy I moved speed lever to desired speed and the motor speed slowly dies to the machine not mixing. Have to move lever back and forth to finish batter

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Re: speed of mixer

Does the motor still run or does it slowly start to get less loud? or is the beater assembly that dosnt work? two different issues. if the motor runs but dosnt beat then its the planitary gears that are ground out and need replacing. if the motor slowly dies out then you need to replace the motor.

Posted on May 05, 2008

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Good Morning,

There is a spring inside your mixer attached to the speed control switch and speed control arm, the spring can sometimes get caught on the slide bar that is just below it inside the mixer. The other reason is that the speed control switch plate in the rear of the machine (that the spring attaches to) vibrates the three speed adjustment screws out or in and the spring will pull the speed switch (control arm that you use to control mixing speed when using the mixer) back to the stir position after you try to turn the mixer off.

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The Speed Control lever is linked to the Speed Link mechanism, which in turn moves the
Speed Control Assembly to allow the motor to operate at different speeds.
Get a Repair Part List from for your particular model to see how it works.
As you select different speed setting, the Speed Link simply moves forward or backward,
thus pushing the Speed Control Assembly back and forth.
If you cannot move the Speed Control lever, means that the Speed Link is somehow bent
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Referring to the following parts description:

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They operate in conjunction with item #25, the control plate assembly.


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Make sure that the spring #4 is attached to the bottom of the control plate #25.

If the governor appears to be opening and closing as the speed increases and the linkage is not binding then the problem is most likely the Phase Control Board, item #27.

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