Douglas S Abington , PA November 26, 2016 Appliance: KitchenAid 6 Qt. Stand Mixer KP26M1XNP4 Kitchenaid Mixer Kp26m1xnp4: The planetary was causing a noise because it was not sitting square on the unit. How to replace Planetary. By replacing the planetary, the problem was resolved with no further damage to the unit. The job was easily completed, though it would have helped A LOT if I had a set of snap ring pliers. Otherwise the job was easy. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes