Tip the machine upside down on a towel, centralise the hinge pin and tighten the grub screw that locks it into place. This is right up inside the pedestal, there is only one screw there to see.
Now stand it up and fit the mixing bowl & flat paddle, turn the machine on speed one, if the paddle is tinging on the bowl then we now need to set the head height. Turn the motor off.
Raise the motor up and from the front of the machine look in by where the motor hinges on the pedestal. You can see one screw head there. If it's tinging the bowl then you need to turn the screw anti clockwise enough so that the paddle no longer tings on the bowl.
Once it's stopped tinging put it onto max speed and make sure it still clears at high speed, if not turn the screw until it stops tinging. That's it.
SOURCE: Kitchen aid 300 watt counter mixer model ksm90
Here is a link to the instruction manual:
http://www.kitchenaid.com/assets/pdfs/product/ZUSECARE/KSM150PSOB_Use%20and%20Care.pdf
Quick summary:
Tilt back the head of your mixer. Look at the joint between the head/body of the mixer. A flat-head (standard) screw will now be visible. Turn this screw counter-clockwise to raise the attachments, clockwise to lower them. Don't turn the screw too much, it is pretty sensitive.
SOURCE: the head, on which the mixer is attached, is dipping down too low
HI. You may have asked your question in the wrong mixer category. The following link describes the Kitchenaid mixer at this heading. If this is not your mixer, try again. If this solution has assisted you, please rate it. Good luck! ricardok45 http://shared.whirlpoolcorp.com/assets/pdfs/literature/Repair%20Part%20List%20-%208212054.pdf
SOURCE: Can't get the screw adjustment to change the height of the bowl
I had a similar problem with mine - the problem turned out to be that I hadn't clicked the bowl into place corectly. If you find the bowl is tilting forward slightly then you probably need to push it into the clip at the back.
SOURCE: 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.
• 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.
• 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
Testimonial: "Thanks to this answer, I was able to fix the problem in about five minutes. I am very grateful. Joe McCutchen"
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