removing control knob on washer

I am replacing the timer on my old washer and am having difficulty removing the control knob. The videos show a mechanism on the timer itself which you secure while pulling the knob off. My machine’s timer does not have this. I don’t want to break the knob as I have attempted to pull it forward unsuccessfully. Any ideas??

Try pulling it out and unscrewing it off while holding the ring behind it if yours come equipped with it…