Joanne M Cohasset , MA March 21, 2015 Appliance: Maytag Dishwasher MDBTT79AWB Maytag Dishwasher Mdbtt79awb: Upper wash arm broken on dishwasher. How to replace Upper Wash Arm. Ordered new part - delivery was excellent - repair took less than 5 minutes! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes