I have never seen chains of a tractor! However, I have stuck a small (32 hp) 4WD tractor twice in the mud while trying to bush hog the edges of my marshy areas.
Both times when I was getting pulled out, I could hear the massive suction on the sidewalls of the tractor tires finally break as the tractor got back on top of the ground.
I wonder if one way the chains help is to prevent all of the suction when the tractor tires do deeply sink into saturated ground?
