John S Miami , FL October 20, 2017 Appliance: Whirlpool Mixer K5SS Whirlpool Mixer K5ss: Bad kitchenaid mixer (at least 35 years old). How to replace K5ab 5 Quart Kitchenaid Flat Beater. Four parts shipped to Central America. Parts ordered & Mixer fixed with help from your parts list & your diagrams. Most serious was the plastic sacrificial gear. Buy a spare! Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours