How do you install a motor in a Lionel train?

To install a motor in a Lionel train, first, carefully remove the shell or body of the locomotive by unscrewing any screws or using a flathead screwdriver to pry it off gently. Next, disconnect the old motor by unsoldering the wires from the circuit board or motor terminals. Place the new motor in the designated slot, re-solder the connections, and ensure proper alignment. Finally, reassemble the locomotive shell and test the motor to ensure it operates correctly.