Linda P Orange , VA February 14, 2021 Appliance: KitchenAid Dishwasher KDTM504EPA0 Kitchenaid Dishwasher Kdtm504epa0: One of the propellers came off of the bottom wash arm. How to replace Arm-Spray. I replaced the entire wash arm. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes