Congrats on the new Kubota. I got a new L3540 HST delivered last week & I read in the manual that it's best not to challenge the tractor too much till it gets 50 hrs on it. The dealer didn't mention it at all but I guess it's just common sense. I used a 5 ft bush hog for about an hour and the tractor didn't seem to be working hard at all.
Ques - Did the dealer give you any instructions re the 1st 50 hrs?
I have about 90 hours onj my L4400HST and am happy with the machine. I have not had the first issue with it. You will love running this machine and it sips the fuel for the HP.