Recently picked this band saw up. It is 50 plus years old but it is built like a tank with American steel. 

anyway all is going great but I can’t seem to get the bottom thrust bearing adjusted. I’ve got it tapped out as far away from the blade as it will go, but it is barely touching the thrust bearing. The top one I have plenty more adjustment room. Due  to this I have to run the saw blade with the blade starting halfway on the pulley tire. This puts the teeth right at the end of the pulley width.

any ideas ?