Do I hurt my 1025R by not using low range when mowing up steep hills?

Just got my 1025R a few weeks ago and so far use it mostly for mowing (I have the 60D). Some of the areas I mow are pretty steep and I'm somewhat disappointed that the tractor isn't able to climb those sections of the yard without me putting it in low range. I have plenty of traction and don't need to go in 4x4 mode, and it will go if I push the forward pedal really hard, but I feel like I'm going the bend the "spoons", if you know what I mean.

So to those that mow up steep hills, are you switching to low range and then back to high range once you get to flatter land again? It is a bit of a pain to having to constantly switch back and fourth...