Since your machine only holds 2.9 gal, and Messicks sells Kubota UDT for $17.86 per gal, or $15.85 if you buy a 5 gal pail, to me it is not the place to be selecting a generic lubricant when you don't know which properties are important in the design.
I don't know the current situation but, in the 1980's Ford and GM had different automatic transmission oils. You would think what would the difference be but there was one and it was important. One had a high static friction coefficient and the other did not. Put the wrong one in your car and the damage was thousands of $.
Often owners with large machines have UDT left over from a drain and refill and may be willing to sell you enough for your machine just not to have a partial 5 gal sitting around.
Dave M7040