...take some pics if you could....
..okay, so you put on the moving pulley and ramp / roller / face seal cover assembly...slip the belt onto the shaft..at this point, the belt should be against the moveable drive face pulley, and hugged around the shaft collar....
..next, install the non-moveable drive face, washer and nut, making sure the drive face is seated against the collar...should squeeze against the belt...