Here is the update. My tractor was not equipped with the PTO engagement lever and no way to install one. It has the PTO shaft and the two speed lever but no way to engage the PTO shaft with the power shaft.
I know this is an old post but I also have a taskmaster 426. All is well with It except I do not have a lever or as far as I can see a place for one to shift the PTO in or out of gear. I have the lever in the back to change pto speeds 500 or 1000 plus neutral. A photo of where it should be or...