My take on why the dealer declined to service the unit.
1. Still under Kubota warranty.
2. No Kubota fluid- UDT-SUDT.
3. No Filters.
4. No training on Kubotas
5. The list could go on and on - Who would pay for the mechanic to learn the service procedure? (Customer) - (Dealer) ?
6. Who would pay for the mechanic-parts person to located filters, fluids? (Customer)? (Dealer)?
7. Who would arbitrate, it wasn't doing that before you serviced it?
8. Etc..............
I am a strong advocate of having automobiles, trucks, tractors, motorcycles serviced at place of purchase. Most dealers will sell a unit, car, truck or tractor at a fair and reasonable mark-up price. I check prices before making a car, truck or tractor purchase. I don't tell one dealer what another dealer will sell for. My view on this is I am trying to purchase something not get two or more dealer in a shouting contest. I then evaluate distance for service work, dealer (sales-staff) attitude, service department attitude, etc prior to service. I WOULD NEVER unless traveling have service work done at a dealer other than where the unit was purchased.
I surely would not take my new Cadillac to a VW dealer for it's first service or for warranty work and then get upset when they advised they would prefer if I had the work done at a Cadillac Dealership.