My brother picked up an AF22 gray market Yanmar (no manual available) and I'm hoping someone can steer me to a comparable tractor sold in the states. I'm wondering how close it might be to a YM2200. The front axle 4x4 wont engage and it seems to be a spline right at the front axle that is keeping it from engaging- either broken or stripped. Trying to figure out how to access it. Surely this mechanism must be the same or similar than other models. Any help would be greatly appreciated!