With the help of a YouTube video, (thank you, Obie Acres) and Tx Jim original information about the Idler pully, I think we're ready to go.
After lifting the back gate about half way to engage the pump, we could see that the belt was not engaged when the #46 pully was turning.
Turned the tractor off and started moving things around and checking springs.
Something moved/got unstuck! (I still have all my fingers.) Now the parts are moving much more and there is tension on the belt! Yay!
Hope to get the baling done tomorrow!