How to disassemble - Jeanie Rub Variable Speed Professional Back Massager

There is an adhesive label on top of the unit. Use a single edge razor blade to lift the label from either side (left or right) until the two recessed hex nuts are exposed. You will need a 9mm socket to remove these hex nuts. Be careful as there is a 6mm jam nut at the base of the threaded rod that holds the rod against the top of the motor housing.
Once you have removed the two hex nuts, be sure to save the tiny washers in a safe place. Once the handle is off, you might want to mark the black wire that is conected to the white wire to ensure that reassembly enables the proper connections.
Once the handle is off, you can take a small pair of needle nose vice grips and squeeze the cord retainer to facilitate the removal of the handle completely after removing the wire nuts.
Be sure all wire ends are marked to your approval.

The jam nut on the threaded rod needs to be loosened in order to lift the motor housing off of the motor. Use only a drop or two of penetrating oil on the threaded rod. Attach the two hex nnts removed earlier at the top of the threaded rod to create a jam nut at the top, by tightening them together. Holding these with a wrench, use a 6mm open end wrench or tiny vice grips to loosen the jam nut. Be sure the 6mm jam nut freely moves to the top on each side.
Remove all hex nuts and the motor housing can be lifted off.
Be very careful not to let the motor tirn over or you may lose the springs.