How to replace: It is not difficult to replace the 122650 Ametek motor. There are three to four screw brackets and a couple of wires. All of our customers are amazed at how easy it is. NOTE: There is no core trade-in. Used motors are thrown away or taken to a metal recycling center. Click here to read and print out our step-by-step motor replacement instructions. Note that if the unit bolts into metal brackets, then the ground wire can be snipped. If plastic, then attach the ground wire to the ground from the power cord or anywhere to metal on the unit.