That depends mightily on the size of hay bales you need to carry. Round bales weigh between 500 and 2500 lbs. The 430 loader weight limit is somewhere around 1200 lbs and the 3ph is around 2500 lbs IIRC. A 500 lb. bale on each end shouldn't be a problem, but I wouldn't want to go too heavy on each end at the same time - that would really stress the bell housing area of any machine.