I have looked threw a bunch of postings about Walker Hydros. I have learned that I need to check my belt and pulleys and the tensioner spring. But I am not sure if this is going to help. My machine has trouble backing up a hill but one (the right one) wheel seems to be doing most of the work. The machine goes forward straight but turning left is harder than turning right. Another thing this problem only happens when the machine has been used for a bit and is warmed up. What do you think might be happening?