My only experience with modern tractors is with my Branson. Now it's not a 10 or 15 series, like what is being discussed, but a 25 series. A "mid sized CUT"?
My bare tractor weight is listed at 4200 lbs (cabbed unit), and that's without the loader. I think the loader and std bucket weighs 1500? I don't remember. What I do know, because I actually weighed mine on a certified CAT scale, is with Rimguard filled rear tires, the loader, and a light duty 6' box blade on, it weighs 7100 lbs.
I have never deliberately tried to "lift a ton to full height". I have lifted and carried large round bales:
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I did not try to lift it to full height. Never needed to. I did lift it up and over the side of the feeder, which was 4 feet? I would have preferred more ballast on the 3 pt, but at the time I needed to feed the barrel, that is what was on it. Now I'm only guessing that the bale weighed between 1400-1600 lbs. I had no way to weigh them, nor did I really care. The center of the weight was certainly farther forward than "the pins".
I also lift this pallet of sand bags in and out of the bed of my pickup truck every winter:
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I usually have between 22 and 24 bags of sand on that pallet, the bags weigh 60 pounds each, plus whatever the wooden pallet weighs. Again, I don't try to lift it to full height, but up to the level of my truck bed. Also, obviously I'm lifting well in front of "the pins".
This planter is the most weight I've ever tried to lift with my loader. When it was full of dirt, and I mean level with the top, it would not lift it. After refiguring the weight from the original math error (I was trying to set up a planter that I could pick up and carry). I came up with a "guesstimate" of 3000 pounds. Again, it would not lift it:
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I then hand shovelled out a good amount (maybe half?), and it would lift it this far. Again, I'm not certain of the weight, I have no way to weigh it. As you can see, the center of the weight is much farther ahead of "the pins".
Looking at these lifts, bear in mind that I think (I honestly don't remember) my loader spec is 2200 pounds "at the pins". And that is to full height.
I have never tried to lift any serious weight by hanging it off the pins to check the spec. From my own seat of the pants "figuring", I think it would do it. Would I want to? Not if I had a choice. That much weight, that high in the air takes some serious attention. With enough weight on the 3 pt, and flat, level ground, like a concrete pad I think it would be fine. But moving it around? Dangling from a sling or chain? Yikes.
With as much weight as I have lifted from a normal "in front of the pins" setup, I believe it would do it (lift a ton from the pins).
So what I'm saying is, I believe the Branson spec on the smaller frame tractors too. Yes they will lift a ton at the pins. Whether that becomes a problem or not entirely depends on the operator, and what setup and precautions they've put in place. At least Branson, and I think the other Korean brands, they don't "Nanny" you. Yes the lift is there. Whether you know how to set up the equipment to make that lift safe or not, is up to you.