I would at least look where the fluid is coming from, fitting may just need tightened, not going to void warranty for tighening fitting. I had simular experiance when cylinder replaced, gone two weeks, then got back and puddle hydulic fliud under it. Took 10 minutes to see where it was coming from. Tighten and fine since then. So my blood pressure was only up for 15minites rather than days going back to dealer.
Of course if it looks like more than tighten something guess you are stuck with dealer and i'd give him one more shot then call kubota and tell them you want another dealer to come out and fix.
Taxes sounds fishy, personnally i'd look for my receipt quote to see if taxes on it, at deal is a deal though, if they quoted and you signed for the lower price I'd think it was dealers problem.
Of course if it looks like more than tighten something guess you are stuck with dealer and i'd give him one more shot then call kubota and tell them you want another dealer to come out and fix.
Taxes sounds fishy, personnally i'd look for my receipt quote to see if taxes on it, at deal is a deal though, if they quoted and you signed for the lower price I'd think it was dealers problem.