I have a 1989 b9200 gear driven 4x4. It seems as if the pto lever and 4x4 lever will only work together so basically it will it will only go into 4 wheel drive when the pto is engaged and vice versa. Should the two levers work independently or is it meant to work together? It’s a little rusty and I can’t tell how the levers should work and can’t get them off of the shaft to try to figure it out. Any help is appreciated. Thanks