[QUOTE=RAG;1079548] the other *should* swivel the chair, that's the one I'm referring to in my original question. It won't release the chair.
If lever is doing its job it releases a cog, however the chair monkey at AS makes sure you don't get a loose feeling while riding down the road. He tightens the crown nut located in the center of the seat. Put your hand carefully under the seat, reach to the middle and you should be able to feel it. I think it is bigger than 3/4, hardest part is removing the cotter pin, it only takes a quarter turn counter clockwise to have a swiveling seat, once you lift the lever.