Charles T Vermilion , OH September 09, 2018 Appliance: Whirlpool Dishwasher DU960PWKQ0 Whirlpool Dishwasher Du960pwkq0: A top dish rack shelf wheel was broken. How to replace Arm Assembly. I replaced the Arm Assemblies on both sides. Just remember how it was removed and do the opposite to put them on. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes