Thomas D Ocala , FL April 26, 2017 Appliance: Whirlpool Undercounter Dishwasher DU915PWPS0 Whirlpool Dishwasher Du915pwps0: Broken spray arm nut. How to replace Dishwasher Spray Arm Ring Bearing. Replaced the spray arm nut. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes