I have a Case 1570 on which I recently installed an Artsway 4000 loader. It all went together fine but the front wheels rub the siderails when cramped sharply. The simplest solution appears to be setting the wheels out a notch. However, the two big bolts that go through the telescoping axle won't budge. Getting the nuts off wasn't a problem but those bolts have a head that's flat on two sides and they refuse to turn. Also, finger spinning the nuts partially back on and tapping yields nothing; in fact, the taps sound absolutely solid as though the bolts are part of the axle. Does anyone know the trick to getting those bolts out?