I do not know why you would which to remove the motor. I do not recommend it. The motor is connected to a transmission in the front of the mixer and was most likely pressed in to place by a machine into a baring in the back of the transmission. As far as I can tell the only user serviceable parts are in the back. Primarily the bushings and the back service cover.
To remove the windings you will need a puller. You might be able to find one at your local auto parts store, or one of the stores that specializes in tools such as Harbor Fright, Northern Tool or something like that. Once you remove the back cover you should see the armature, simply attache the puller to the shaft and extract it. If you are lucky you will be able to reinsert it in the opposite order. However, there is a chance that parts of the transmission will fall out of place making it difficult to reassemble.
I am pretty sure you can disassemble it, but putting it back together will be much more challenging.
If you are having trouble with a switch or the bushings I would call Kitchen Aid first. Help Contact Us KitchenAid