Ken G Lexington , SC January 25, 2024 Appliance: Whirlpool Dishwasher WDF520PADB7 Whirlpool Dishwasher Wdf520padb7: The spray arms on the dishwasher were not spraying. How to replace Dishwasher Circulation Pump And Motor. Replaced the circulation pump. Had to buy a hose clamp crimper to use the clamp that came with the pump. Could not find the thinner screw hose clamp suggested in the video locally. It would have taken less time if you recommend/offered the hose clamp at the time of purchase. 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours