Check the Rods on all the hydraulic cylinders for paint overspray. On the loader, for example, Kubota retracts the cylinders then spray paints the whole thing. There have been several cases reported, including two on my own, where the cylinders weren't completely retracted when painted. When you the use the loader and they do retract all the way, the paint on the rod abraids the seals in the end of the cylinder and you get leaks. I had leaks develop in a loader cylinder and my backhoe swing cylinder from this. Both were fixed under warranty, but the down time and logistics were a pain in the butt.
When you get the tractor, check all 4 cylinders on the loader, and any cylinders on other implements. If there is any question, just take a razor blade and scrape back the paint on the rod. It's real easy and can same you a completely unnecessary nusance repair. I suggested to my local dealer that they do this as a matter of course when setting up new machines, but it went in one ear and out the other.
I've also received equipment with loose hydraulic fittings and related leaks, and even had my new tractor delivered with the oil filler cap off. Unfortunately I didn't find it until after running for several hours, but I don't think any harm was done.
High techie, reciently founded a startup company and struggling for tractor time.