Originally Posted by mickey
when i turn the little knob it is as tight as it will go and the wheel still free spins
Sounds like the washer might be put in wrong OR it is missing completely. It looks like your machine was a parts machine for another 128. But It can be fixed!!
Take the small screw out of the center knob and unscrew it completely off is there a washer there? if it is flip it over and put it back together again and try it out.
Billy