John P Grafton , MA November 15, 2024 Appliance: Maytag Dishwasher MDB4949SHZ0 Maytag Dishwasher Mdb4949shz0: Top dishwasher rack falling out of tracks. How to replace Upper Dishrack Wheel Assembly. Installed new Upper dishrack wheel assemblies (4). Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes