I have a 2013 B2620 with 180 hours on it. Just recently I am noticing a feed back almost hesitation through the steering wheel. I turn the wheel and the steering wheel fights back and tries to turn the opposite way to the way I am turning. It almost feels as though there is air in the system. A side note I just had a front end loader added to the tractor, not sure if that could have allowed air into the hydraulic system. Thank you for any assistance you may be able to give.