Wojciech W Mchenry , IL December 26, 2015 Appliance: KitchenAid 6 Quart Professional 600 Bowl Lift Stand Mixer KP26M1XER5 Kitchenaid Mixer Kp26m1xer5: Stripped gears. How to replace Stand Mixer Retaining Dowel Pin. Replaced beveled gear, worm gear and grease Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes