I am preparing for a B7100 tractor split and am having trouble removing the knuckle arm drag assembly link arm . I loosened slotted nuts both ends but cannot get it to shift at all. I then tried to loosen the pitman arm (from the steering box) off it's spline ( to see if this loosened up things) but couldn't shift that either. So far I have been using a rubber hammer and timber as I didn't want to damage anything.