I have the same tractor and bumped mine up a couple of weeks ago from 1450psi to 1750psi. I highly recomend you buy a wet gauge to measure so you don't end up damaging something.
I think you mis-typed. Didn't you mean from 2450 to 2750 psi?
The attachment is a camera snap from the Kubota WSM showing the valve, it's parts and the pressure per shim.
jb
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