I just had a kind of the same experience.
I purchased a new 5030 HSTC and came up on the 50 hour service. The 5030 has a service reminder built into the dash that blinks at you so you can't ignore it. I deal with a large farm equipment dealer who sells a lot of Kubota tractors along with several other lines. They have a well stocked parts department and what I consider to be an excellent service department also. The 5030 takes 3 filters, 1 for engine oil, 1 for transmission fluid (high pressure filter) and 1 for the hydraulics. It also takes a fuel filter, 2 air cleaner filters and a cab inlet air filter but these are changed as more hours accrue.
I asked the counterperson for a set of oil filters for the 5030 including an engine oil filter. When they consulted the parts computer (microfiche), there were no listings for the 5030 filters. The counterperson then called Kubota in Columbus, Ohio and obtained the reference numbers and found they were on the shelf as the filters are also used on other models. I suspect that Kubota is having a little trouble updating their parts inventory numbers as they have introduced a number of new models and upgrading does take time.
As I deal quite a bit with this dealer on tractor parts and implements I know most of the mechanics personally. The mechanic that works almost exclusively on Kubota's told me that the only difference between Super UDT and UDT other than the price was that the Super was introduced for Hydrostatic units because it has better flow characteristics at low temperatures than UDT. He told me that because I keep the 5030 in a heated shop in the winter, the Super UDT was unnecessary and that is fine with me as the UDT is cheaper, especially by the drum.
I also compared the prices at Tractorsmart.com with my local dealer and the prices were the same. I don't pay tax anyway because we have an agricultural operation. The mechanic also told me that he believed that Valvoline manufactured the UDT oil for Kubota.
As far as changing the UDT at 50 hours, I do a filter changeout at 50 and then add makeup fluid to the full mark. I do a complete fluid change and lube filters at 100 hours and then a complete fluid change after every growing season. Kubota's internals are very clean from the factory, much cleaner that earlier models and at least on the 5030, Kubota has done away with the filter screen banjo on the intake side of the pump. If you look on the back panel of a UDT jug or drum for that matter, you will see that UDT is compatable with most HY-Trans fluids designed for wet brakes.
Please understand, our maintenance program is geared toward our ag operation. I'm sure that we use our tractors much harder than a homeowner would. Don't forget to grease all zerks at least every 10 hours also.
Daryl
Forage Services, L.P.
