KitchenAid Artisan Series Tilt-Head Stand Mixer "repair mixer wobbles back" Questions

mixer (325 watts/model KSM150), about 5 years old. Lately, when mixing dough for bread or cookies, the motor head of the machine wobbles a bit from side to side. In addition the pin on the side starts

repair your mixer yourself. Finally, here's a link to an excellent site that details the disassembly and replacement of a mixer's grease, which might be helpful, too. http://www.foodonthefood.com/food