Even though your an enginier, and gess who diesingns these things, i'll agree these tractors aren't designed for what we do to them. I have seen broken front axeles and i have said in the past to keep front wheels turned in there are guys that will say turn them out but i don't think they realize the stress the front end will take expecally if the axle hits the stops on one front wheel. Yet we all want more lift on loader, well mine lifts enough i don't want more and mine will last! but back to the weight the loader just blew the bias out the window as did loaded tires the wheights you put are recomended not an auctal. i'll bet the tractor stock is probly off the mark. close maybe! Cat enginers suck they down size parts and when they break there is always an update kit to fix it,at first its the operator then after a couple times the update kit, then they still don't admit it was a problem! I'm not picking on you just stating enginers mak mistakes even in the const. field i see scewd up plans every day,water will run up hill acording to the plan.