eepete
Platinum Member
OrangeRidge, tnx for the reply.
When my Kubota dealer serviced my B21 after it's 1st 50 hours, he put in "plain old" UDT. He said that the SUDT didn't really make a difference with the warm winters we have here in North Carolina. Owners manual recommends SUDT and advises to consult your local Kubota dealer for further details. This is a '97 B21, so warranty not an issue. The tractor is kept in an insulated garage, so even in winter it will be started at a temperature somewhere above 45 degrees.
My Deere dealer sells 95% regular JD Hy-Guard, 5% low viscosity Hy-Guard. I put regular Hy-Guard in my JD 4520, low vis in the 318 since it gets used to remove snow when we get it, but might be changing everything over to Hy-Guard come spring.
I found somewhere on the net the viscosity numbers (the "cSt") ratings for UDT, Hy-Guard, Super UDT, and low vis Hy-Guard. The UDT and Hy-Guard are within 1.5% the same stuff (viscosity wise). The properties for SUDT are a bit wider as a multi-weight oil, but in general it's a bit thinner than UDT. There is no Deere equivalent to SUDT.
So in the interest of having fluids that are common to my equipment, I'm going to change out the B21 to the Hy-Guard. If this is wrong, then my Kubota dealer is wrong and so is every tractor they service. Deere and Kubota are great companies and I'm sure they have all the additives needed in their transmission oil.
If I lived north of the Mason-Dixon (more or less) I'd use the SUDT due to the colder winters.
Not trying to start an argument here, just putting my out loud thinking and dealer experience on the table. I've enjoyed this thread because it's time to change out my B21 oil.
Pete
When my Kubota dealer serviced my B21 after it's 1st 50 hours, he put in "plain old" UDT. He said that the SUDT didn't really make a difference with the warm winters we have here in North Carolina. Owners manual recommends SUDT and advises to consult your local Kubota dealer for further details. This is a '97 B21, so warranty not an issue. The tractor is kept in an insulated garage, so even in winter it will be started at a temperature somewhere above 45 degrees.
My Deere dealer sells 95% regular JD Hy-Guard, 5% low viscosity Hy-Guard. I put regular Hy-Guard in my JD 4520, low vis in the 318 since it gets used to remove snow when we get it, but might be changing everything over to Hy-Guard come spring.
I found somewhere on the net the viscosity numbers (the "cSt") ratings for UDT, Hy-Guard, Super UDT, and low vis Hy-Guard. The UDT and Hy-Guard are within 1.5% the same stuff (viscosity wise). The properties for SUDT are a bit wider as a multi-weight oil, but in general it's a bit thinner than UDT. There is no Deere equivalent to SUDT.
So in the interest of having fluids that are common to my equipment, I'm going to change out the B21 to the Hy-Guard. If this is wrong, then my Kubota dealer is wrong and so is every tractor they service. Deere and Kubota are great companies and I'm sure they have all the additives needed in their transmission oil.
If I lived north of the Mason-Dixon (more or less) I'd use the SUDT due to the colder winters.
Not trying to start an argument here, just putting my out loud thinking and dealer experience on the table. I've enjoyed this thread because it's time to change out my B21 oil.
Pete