I think you'll just make it. Another option would be to use the loader to lift it from above with straps to get the weight closer to the tractor.
Dang! If you're moving gold bullion with a Kubota, well, you gotta take pictures.
The 4240 has the 854 FEL? 854 x 2.2 (lbs/kg) = 1878.8... say ... is this a joke?