Roger G Lincoln , NE August 04, 2017 Appliance: Maytag Dishwasher MDB6949SDE0 Maytag Dishwasher Mdb6949sde0: Grinding sound in dishwasher. How to replace Dishwasher Circulation Pump And Motor Assembly. Ended up with replacement of the motor assembly. 6 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours