Slicing blade wobbles.

Question

I have a Rival meat slicer, Model 1101/8. Although the blade holding s***w is tight I can feel looseness in the blade. I assume that the blade also wobbles when in use. It appears that the blade holding s***w is slightly too long. Before I try to shorten the s***w I'm trying to find out if the blade is supposed to be loose or if I am missing a washer.