Kitchen Aid KSM90 300watt Ultra Power Mixer

smell the motor housing for any burnt smell.suggest you buy a new one.theire not worth fixing

We sell the beaters at The Mending Shed, they are $8.95 for the set of beaters.
Here is a link to those on our website: http://www.mendingshed.com/kahandbeater.html

The button doesn't move. You must push the beater up beyond th notch and turn it while pushing up.

Are you using the white coated beaters or the burnished beaters. If they are the white coated beaters then the finish has come off and the zinc/underneath is rubbing off. Are you using the aluminum looking beaters in heavy acidic applications? if the mixer is new go to kitchaid customer support they will re-place. if your mixer is out of warranty then you need to replace it. about 15.00 t0 24.00 USD. if the problem persists then you may be leaking metal shavings from the planetary head, (I don't think it is happening but it is a possibility) if it is ground metal shavings you have a serious problem. I can't say anymore without knowing more. What application are you getting this result. is it all the time. is it after the mixer sits along time. need more info.

There is only one pin on the beater shaft to hold the beater in place.
There is no spring or washer on the shaft.

To Attach Flat Beater,Wire Whip, or Spiral Dough Hook, simply
1. Slip flat beater on beater shaft.

2. Turn beater to right, hooking beater over the pin on shaft.

The likelyhood of grease coming from the mixer is extremely small. As long as the beater & bowl were washed first and the shortening you used was fresh, there shouldn't be a grease taste.

There are 2 possibilities, the attachments are worn out where they go on the shaft, simply replacing them could fix it, the other is the shaft is worn out inside the planetary ( where it spins), if it moves allot, 1/8 " or more from side to side, the housing is probably worn, and the planetary needs to be replaced, easy job, don't know cost, a new mixer may be in order.

http://www.marbeck.com/mixers_kitchenaid_parts.html

heres link for replacement parts

my recommendations i would go with new parts but some will like to do the work them selves

you most likely stripped the plastic gear (Worm gear???).  This gear is designed to fail to prevent the motor from burning out under EXTREME loads (i.e. when a metal piece falls into the bowl). The plastic gear is much cheaper than a new motor.  Look around on this site to see how to get at/repair the gear.  I've found many parts on eBay.com and also PartSelect.com.

good day,
hope this link below will solve your problem.

kitchen