Its not stuck but the knob is missing and there is just a screw to turn it. I oiled the joints and the shaft now slides in and out easily. Guess its time to put some grease in the appropriate places and clean everything. Then I'll close it up and see how it sews.
Youse guys are the greatest. Thanks ThayerRags and Miriam.
Daughter is already taking home two she intended to give me. Guess I shoulda waited till she left for home to fix them.