If you decide to disassemble the motor pulley for any reason, be aware that
there is a strong spring holding the pulley closed against the belt. If
yours is like mine, removal of thye retaining clip will cause the parts to
leap across the room. The spring and the clip will try toi get away from
you.

My solution: tie one end of a cord to the clip, and the other end to the
spring. Try to keep the string in hand as things fly apart.