Install you're draft arms in the bottom holes of the blower as well and then put the blower on the ground and adjust the top link to level it. It's all in the pivot point locations.. The blower in the raised position should look a bit tipped towards the ground, and level out by the time it hits the ground.
Ideally the blower should remain level through it's full range of motion, from on the ground to fully raised.
If I lift mine all the way up and it doesn't lilt towards the ground just a bit, when I'm blowing on a little uneven ground it will skip a bit that's why I set the top link to angle downward a bit when the blower is lifted all the way up..
Do whatever works for you but do it with the understanding that the blower input shaft and tractor output shaft aren't aligned with each other when you have the blower raised. In the raised position you usually aren't blowing snow so a small amount of misalignment probably won't hurt anything.
They actually are aligned, it differs on different tractors depending on the size of the tractor. It's not a one size fits all, most blowers are close to the same overall height, add a tractor with a lot of height and you have more angle to deal with..
The steeper the angle on the driveshaft, the faster it will wear out U-joints, but it should work within reason.Maybe I misunderstood what you were saying. I made the assumption, my mistake, that you were saying the blower is level when in the lowered position but tipped back when in the raised position. If that were the case the PTO shafts would be at the same angle to each other (aligned) when in the lowered position but not at the same angle to each other (aligned) in the raised position.
The height of the tractor PTO and the blower input shaft make no difference in the angle of the PTO shafts but does make a difference in the angle of the driveline. Any of my discussion has been in reference to the angle of the PTO shafts to each other, not the angle of the driveline.
I'v never had a gift for words so I am probably creating some confusion.