</font><font color="blue" class="small">( <font color="blue"> How much trouble is it? </font> )</font>
It's a right royal pain. I've only ever had to do it twice on one of the farm tractors but manhandling filled rear tires was so much trouble that I never had them refilled. In our area, no one will come out to fix flats anymore, you have to get them off and bring them in to be fixed ... thank you insurance companies and lawyers.
First, you need 2 tractors because one is jacked up and useless. The second better have a FEL or it comes down to brute force to manhandle the wheel. You have to drain the tire and catch the liquid because you don't need to be spilling either CaCl2 or antifreeze on the ground. Then you have to reinflate it, if your lucky, because handling a flat rear tire is a challenge, break it off and get it on to a trailer or into a truck and off to be fixed. Reverse the procedure to get it back on. All in all, it's a lot of grunt work and one of my least favorite tractoring experiences. For me, if I desperately needed the additonal weight and traction, wheel weights would be a better alternative and I'd love to be able to afford to have them foam filled ... one can only dream.
Ofcourse, none of this applies if there is someone in your area who will fix them in situ but those guys are getting harder to find because of liability issues. I'd check around to find out before making any decision. It doesn't happen very often, twice in twenty years in my case, but that's was more than often enough.
