Christine E Ann Arbor , MI April 10, 2015 Appliance: Maytag Dishwasher MDB8750AWW Maytag Dishwasher Mdb8750aww: Bottom rack of dishwasher needed replacement (2004 maytag). How to replace Lower Dishrack. Bottom replacement rack is a complete unit. Simply slid the old, rusted one out and slid the new one in. 17 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes