You must have some figures backward or something. My 72 HP Utility tractor will only spec out as 3500 # lift with the loader while it spec to lift 6173# with the 3 PH. MY Tractor weight without
ballast or FEL weight is around 6600#. Your info doesn't list tractor size but the tractor in your profile photo looks like a CUT and NOT as big as a utility tractor. I think it will pick up a bit more than spec but not much more. The heaviest known weight I have lifted is probably when I lifted the front of my Chevy Silverado Z71. I have lifted rocks bigger than the one in your photo and I don't think they weighed more than 2500-3000 Lb.