The original side link and top link do not float. They are fixed. The three point lift arm will float up.
I understand and use the float function on a loader. Exactly what would I use a float function for on a side link attached to a scrape blade, box blade or tiller?
Actually, many tractors have a slot in the lower clevis of the side link. The pin can be either locked in place so it is rigid or unlocked and then the implement is free to float up independent from one side to the other. John Deere has this on all of their deluxe tractors 3000 series and up. Kubota has it on the M8540 and up and many of the Korean tractors have it on the 50hp and up sizes. And I think that some New Holland's have it also. So there are a few that do have the option of side-side floating, even with manually adjusted linkages.
Yes the 3pt arms float up, but together, not independently. Having the arms being able to move separately has it's place.
You would use it anytime that you want to scrape a surface clean, not trying to level anything out.
When finish grading a road at an intersection. The camber of the road changes from one road to the next. Just as you go around a corner, kick the side link into float and the implement then follows the angle of the road instead of the angle of the tractor as it goes around the corner. That way you don't dig in or leave piles of dirt where you don't want it.
I guess that you could use it on a tiller, John Deere recommends that the slots be used when tilling, also when mowing. The hydraulic float is not a good thing for mowing. It's main use is when doing dirt work. It is not like you use it all the time, just in certain situations.
the pictures are of a JD and a Kubota.
I hope that sort of gives you an idea.
