Back around last Thanksgiving, I brought home a AC C, with a 5' sickle mower on it,( mid mount). The right rear wheel wouldn't rotate, and I think the brake is rusted up and stopping it. We had a couple of sunny days this week, and I took the wheel off, then the cast center, and god was that center heavy! After letting it fall to the ground, and doing a fancy dance step, to avoid getting my foot crushed, I saw that the center had a full fledged wheel weight, in side it. apparently they will fit on either side of the wheel. The other wheel is also the same. Any idea why they put them inside the wheel? The pitman arm is missing on the mower, and the attaching bearing is made strangely, with two pins sticking out on it like maybe a yoke is on the end of the pitman arm. That is going to be hard to find, especially since I have nothing to go by.