Dennis S Ririe , ID April 29, 2021 Appliance: Whirlpool 4 1/2 Qt. Stand Mixer Classic - Tilt K45SSWH-0 Whirlpool Mixer K45sswh-0: Mixer would not turn when under any pressure or strain and leaking grease. How to replace Stand Mixer Hub Gear Kit. Replaced worn gear-hub and replaced old grease with new. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes