The motor is fastened to the cover plate and connected by two or three wires. Before disconnecting any wires, carefully label their placement. The wires may go directly inside the motor or they may be attached to terminals with slip-on connectors. If they are connected with slip-on connectors, disconnect them from the motor. Otherwise, follow the wires to the other end and disconnect them there.
One of the motor wires connects to a wire cap. If this wire cannot be disconnected from the motor, unscrew the wire cap and untwist the wires.
The remaining wire or wires connect to the shutoff switch near the shutoff arm. Disconnect the wire by firmly pulling the connector off of the terminal (do not pull on the wire). You may need to use a pair of needle-nose pliers to remove the connector. Inspect the connector and the terminal for corrosion. If the connector is corroded it should be replaced.
The motor is attached either directly to the mounting plate or sits atop a gear box mounted to the mounting plate. It may be necessary to replace the gear box if the replacement motor is not available seperately.