Last one to post in this thread wins!

Yes I did a search online for billhook wont release knot. It turns out the sweep needed to be closer to the billhook. Somehow it got pulled away and was not pulling it off the hook. It is over 50 years old and sometimes we also need an adjustment.
We sure do Lol. Glad you got it fixed but when you think about being 50 years old working in the dirt and grass it is doing great.