I own a mahindra 5500 4wd tractor. It has 1300 hrs. the other day the power steering just stopped working. I can steer the tractor but not easily. I know that the pump is a tandem pump My problem is that the hydraulics are working just fine. Could the power steering part of the pump be bad. I probably could fix it myself if I knew what the problem was. Could use any help I can get. Thanks Steve