William B Centerville , MA April 04, 2015 Appliance: Whirlpool Dishwasher DU951PWKQ1 Whirlpool Dishwasher Du951pwkq1: Spray arm nut broke. How to replace Spray Arm Nut. Removed threaded part and relaced with new one Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes