oh sorry. the crank pushes out a stainless tape that is connected to the bottom of the windshield, the top has hinges. turning the crank turns a worm gear, the worm gear turns the shaft, the shaft has a toothed wheel that pushes the tape.
but the shaft is steel mounted in the pot metal bracket. add a couple years and the steel wears the pot metal like this
the worm gear loses mesh with the shaft and the windshield flops around, unable to be cranked tight against the cab.
so what I do is fixture the bracket and drill the ovaled hole out. then I center drill a brass bushing and turn the outside for an interference fit with the hole in the bracket, and squished it all together in the vice. I have three more windshield ragulators, one more so far needs this repair, the one in the 41 in the back yard seems tight and so does the 46 still down south (my future diesel truck) I sold a perfectly working one for $400, which is about the market. broken they are worth about a quarter of that.