Loud grinding noise from water pump

Rather than remove the pump assembly - as an earlier post had done - I pulled the entire dishwasher out and laid it down on the floor. This allowed easy, direct access to the motor (that was the hard, messy part). From this point it was easy. Unplug the wiring, remove the retaining bolt, rotate the motor off the mounting brackets and pull it out. Then put the new one in. That was the easy part (about 15 minutes). The entire job took 2-and-a-half hours, most of which was taken in disconnecting, cleaning up and reconnecting the dishwasher. It's much quieter now.