Pam H Turner , ME January 14, 2019 Appliance: Whirlpool Undercounter Dishwasher WDF510PAYBA Whirlpool Dishwasher Wdf510payba: Arm edges broken and chewed up leaking water not thru holes. How to replace Dishwasher Lower Spray Arm. Replaced lower arm. Easy fix, saved $75.00 on plumber visit. Works like a charm!???? Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes