Been running my tractor I got last spring pushing and lifting snow. Uneven ground. I keep the ballast box low and noticed it seemed to be a little higher. Pushed the lever to try to get it to go down and it will only go up. I've only used this function once or twice so it can't be worn. What do you think? Now it is stuck in the up position that makes it dicey to drive that way because of the higher center of gravity I don't need.