KitchenAid KSM150PS Artisan Series Stand Mixer Logo
Anonymous Posted on Dec 09, 2009

Mixer component vibrates; seems to sit too low; beaters rub against bowl; alignment seems wrong

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  • Posted on Dec 10, 2009
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Hi, LAHR, by the symptoms you describe it appears that it’s time to adjust your mixer’s "Beater to Bowl Clearance" adjustment screw, which should be a pretty easy to do by yourself.
The instructions for adjusting your beater to bowl clearance are located in your Owners Manual. If you don’t have the original manual you can easily download a PDF version of it 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, in your case KSM150 and select the file listed for your model that appears under Owners Manuals (66) KSM150PSER1.pdf (732.33 KB) and save that file to your PC. Turn to Page 14 and you will find the instructions for adjusting the mixer head height.

But to save you some time, I have extracted the instructions below:
Beater to Bowl Clearance
Your mixer is adjusted at the factory so that the flat beater just clears the bottom of the bowl. If for any reason, the flat beater hits the bottom of the bowl or is too far away from the bowl, clearance

Tilt-Head models
• Unplug mixer.
• Lift motor head.
mixer component vibrates - 56a2398.jpg

• Turn screw (A) SLIGHTLY counter clockwise (left) to raise flat beater or clockwise (right) to lower flat beater.
• Make adjustment with flat beater, so it just clears surface of bowl.
If you over adjust the screw, the bowl lock lever may not lock into place.

I hope this helps! – Howard, Burke, VA
If this solution has helped you, please rate it, thanks! - hslincoln

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Just replaced planetary and gears, flat beater still heating bowl. is planetary to be loose or fit tight against mixer head?

The beater cannot "heat" the bowl, so I am going to assume that is a typing error, and you meant hitting.
If the beater hits the bowl it is usually caused by the adjusting screw at rear of the column being improperly set. To correct this you need to turn the adjusting screw slightly to right, or left to adjust clearance. Clearance should be 1/16", about the thickness of a dime.
If this does not fix the problem, and the beater still rubs the bottom of the bowl, it can be corrected by tapping the yoke arm with a mallet, there should be 1/16" clearance between bottom of bowl and end of the beater.
You can determine the 1/16" by dropping a dime in the bowl, the flat beater should just "touch" the coin as the beater rotates.
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If that is the bowl that came with the machine it is not wrong. What happens from time to time is that the head on the mixer automatically adjusts causing the beater to not operate as it should. To adjust the head on the mixer place a dime at the bottom of the bowl, attatch the beater to the mixer and make as if you are going to start mixing. The beater should JUST touch the dime. If it doesn't touch it at all or is pressing it against the bowl, tilt the head of the mixer up to locate the adjustment screw located inside the shaft. Take a flat head screw driver, turn the screw clockwise (to lower the head) or counter clockwise (to raise the head). Place the beater back on the mixer, turn the machine on and see if it moves the dime moves. Once it is properly adjusted the dime should move ever so slightly.
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It sounds like you have two problems. First, the black marks are usually because of a reaction between the beater and certain chemicals used in dishwashers. Try washing the beater by hand and scrubbing it throughly to remove any residue. If this works, don't use the dishwasher again. You could also buy a plastic coated beater.

It also sounds like the bowl height needs adjusting. There is a screw just under the head for this.
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Beater rubs bottom of mixing bowl.

JOE:You don’t say if you have a ‘tilt-head’or a ‘bowl-lift' mixer, but you can easily download a PDF version of your Owners Manual 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 (in your case, use KSM90P)and select the last file listed that appear under Owners Manuals:KSM90PSWW0.pdf (2930.74 KB)and save that file to your PC.You’ll need to have Adobe Reader to be able to open it. Turn to Page 11 and you will find the instructions for adjusting the mixer head height.I have extracted the instructions below:
Beater to Bowl Clearance
Your mixer is adjusted at the factory so that the flat beaterjust clears the bottom of the bowl. If for any reason, the flat beater hits thebottom of the bowl or is too far away from the bowl, clearance

Tilt-Head models
• Unplug mixer.
• Lift motor head.
1aa320c.jpg
• Turn screw (A) SLIGHTLY counter clockwise (left) to raise flat beater or clockwise (right) to lower flat beater.
• Make adjustment with flat beater, so it just clears surface of bowl.
If you over adjust the screw, the bowl lock lever may not lock into place.


Bowl-Lift models
• Unplug mixer.
• Place bowl lift handle in down position.
9d33ad0.jpg
• Turn screw (B) SLIGHTLY counter clockwise (left) to raise flat beater and clockwise (right) to lower flat beater.
•Make adjustments with flat beater, so it just clears surface of bowl.

I hope this helps! –Howard, Burke, VA
If this solution has helped you, please rate it, thanks!.hslincoln
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Several things:

The Professional 600 has a metal gear housing with a metal gearing. Because of this, the Professional 600 will generally run louder than other stand mixers that may have a nylon/metal mesh gearing.

How long is the bread dough being mixed for? Kitchenaid stand mixers must be used on speed 2 for bread doughs, using the spiral shaped dough hook, and mixing for no longer than 7 minutes.

If the flat beater is getting caught on the bottom of the bowl, pleasure assure the bowl is being seated correctly. You will place the bowl on the mixer arms on the left and right hand side. You will also want to take your fingers along the back of the bowl, where it butts up against the base of the mixer, and press downward. You will hear an audible click as the bowl falls into a spring latch and allows the bowl to sit flush and secure. If this is not being done, the flat beater may strike the bottom of the bowl.

If this was not the cause of the problem, please consult your Use and Care Guide about the beater to bowl adjustment. This is an easy adjustment made with a flat head screwdriver that can quickly correct the problem of a flat beater hitting the bottom of the bowl.
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Kitchenaid beater rubs bottom of the bowl

Your beater to bowl clearance has come out of alignment. This can happen naturally over time and with normal use of the appliance. This is something you may correct from home using a flathead screwdriver.

Unplug the mixer, with the bowl and flat beater removed. Tilt the mixing head back as far as the machine will allow. In the exposed hinge, behind where the bowl would normally sit, you will see a 3/8 screw exposed. Turn this screw half a turn counterclockwise (to your left) in order to raise the flat beater from the bottom of the bowl.

This may take a few attempts until the beater is clearing the bottom of the bowl again. If the adjustment screw will no longer turn, do not force it. It is only designed to move so far to make the appropriate adjustment.

Be cautious. Raising the flat beater too high may leave dry ingredients at the bottom of the bowl.

If further information is needed, I would advise you to contact Kitchenaid Customer Service. They may walk through this adjustment through you over the phone and can look into ordering replacement beaters for you also.

Their toll-free telephone number is 1-800-541-6390.
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If the flat beater is striking the bottom of your bowl, this may cause the locking mechanism to loosen and may cause the mixing head to "bounce" during use.

Your Use and Care Guide will cover the "beater to bowl adjustment," which you can do at home in a few minutes with a flathead screwdriver.
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This sounds like an issue of beater to bowl adjustment, which can come out of alignment naturally over time and with use of the machine.

If the flat beater is striking the bottom of your bowl, this may cause the locking mechanism to loosen and may cause the mixing head to "bounce" during use.

Your Use and Care Guide will cover the "beater to bowl adjustment," which you can do at home in a few minutes with a flathead screwdriver.
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This sounds like an issue of beater to bowl adjustment, which can come out of alignment naturally over time and with use of the machine.

If the flat beater is striking the bottom of your bowl, this may cause the locking mechanism to loosen and may cause the mixing head to "bounce" during use.

Your Use and Care Guide will cover the "beater to bowl adjustment," which you can do at home in a few minutes with a flathead screwdriver.
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This may have a simple solution: This sounds like an issue of beater to bowl adjustment, which can come out of alignment naturally over time and with use of the machine.

If the flat beater is striking the bottom of your bowl, this may cause the locking mechanism to loosen and may cause the mixing head to "bounce" during use.

Your Use and Care Guide will cover the "beater to bowl adjustment," which you can do at home in a few minutes with a flathead screwdriver.
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