Locate a manual for the sewing machine if possible. Most antique sewing machines do not have manuals, but you might be able to find one online.
Unplug the sewing machine from the wall outlet in your home and disconnect the foot pedal from the unit with your fingers. Turn the hand wheel to make the needle rise to its highest position.
Remove the screws holding the unit casing onto your Singer sewing machine. Depending on the year, the locations of the screws can vary, but they are primarily found on the sides and top of the unit casing.
Pull the unit casing off of the unit to expose the inner components. Remove the belt from the motor’s stator and then use your fingers to disconnect the wire nuts holding the motor in place. Pull the motor out of the unit.
Use your fingers to remove the gear assembly connected to the belt drive and the needle assembly. These are located on the inside of the sewing machine. Keep all of the parts together. You should have a barren unit casing now.