Did kuboto raise 1sr udt change from 50 to 400hrs?

LBrown59 · Jul 31, 2009

No they just screwed up the owners manual instead.

bstrom · Aug 1, 2009

Changed my SUDT fluid today at 98 hours on my b2620. It was clean as a whistle, no metal that my tired eyes could see. My personal and unprofessional opinion? A waste of time, money and resources. Next tractor I'll just change the filter until I get to 300 or 400 hours.

Ob1kubota · Aug 1, 2009

MessickFarmEqu said:
We called Kubota and asked for an answer on this. It seems there is a typo in the charts for several of the B-Series tractors. They trans fluid should be changed at 50-hours on these machines. There is some confusion because the charts for the L-series also changed showing 300 hours as the first interval for the fluid, this is correct. In the short term they are saying that if damage occurs because of fluid is not changed it won't be held against the customer for following their owners manual. I'd expect we'll see some official communication on this here eventually. It seems that there are people aware of the problem, but I'm not sure if anyone is owning it yet to formulate an offical response to it.

What's that say for super UDT, I believe in changing the filters at 45 to 60 hours and topping the system off on the first service then following the cook book from there. I have thousands of hours on my machines with no problems. I have never completely flushed SUDT out of my tractors just changed the filters, sampled the oil and topped them off.

vrman · Aug 4, 2009

My BX23 manual shows the 50hr change. So I did it.
However my ZD326 shows 400 hours before changing the fluid, but changing the filter every 100hrs.

Frostybear · Aug 4, 2009

I contacted Kubota regarding my L2800 gearshift. They sent me a reply e mail and said my manual is correct. Just change the hydraulic filter at 50 hours to get rid of any assembly debris. Good, I'll do what they say and save myself some $.

timswi · Aug 4, 2009

Ob1kubota said:
What's that say for super UDT, I believe in changing the filters at 45 to 60 hours and topping the system off on the first service then following the cook book from there. I have thousands of hours on my machines with no problems. I have never completely flushed SUDT out of my tractors just changed the filters, sampled the oil and topped them off.

It really doesn't have much to do with the fluid, there is assembly debris floating in it. The filters and screens need the first maintenance to get rid of it. The shavings still are in the fluid on the first change. Yours just might have less due to multiple filter changes. Not a chance I'd take after seeing what comes out...To each his own.

Too much $$$ to take a chance like that. These are far more sophisticated than the 8N's and such.

On the old stuff, you could measure crank bearing tolerance with a tape measure (kidding). Certainly not the newer stuff.

tallyho8 · Aug 4, 2009

To the people who have tractors that Kubota recommends fluid change at 400 hours and you change it at 50 hours because "you don't want to take any chances", I ask you, "Why don't you change it at 25 hours instead of running it all that time with trash in it?

Really, why don't you change it at 10 hours? After all, why take chances?

Why do you think you know so much more than the Kubota engineers know who do the studies and make these recommendations? Kubota has to do the warranty repairs for free if it causes problems so they would be the first ones to recommend fluid changes earlier if necessary.

Kubota makes a good product. I trust their engineers. If I didn't, I would have bought a John Deere.

mswlogo · Aug 5, 2009

Why are we even talking about BioDiesel.

Accord to what I've read Kubota won't support anything over B5 (5%).
Which is kind of useless.

I also read that anything over B5 runs like crap in the Bxx20 series (E-TVCS engines)

Volfandt · Aug 5, 2009

tallyho8 said:
To the people who have tractors that Kubota recommends fluid change at 400 hours and you change it at 50 hours because "you don't want to take any chances", I ask you, "Why don't you change it at 25 hours instead of running it all that time with trash in it?

Really, why don't you change it at 10 hours? After all, why take chances?

Why do you think you know so much more than the Kubota engineers know who do the studies and make these recommendations? Kubota has to do the warranty repairs for free if it causes problems so they would be the first ones to recommend fluid changes earlier if necessary.

Kubota makes a good product. I trust their engineers. If I didn't, I would have bought a John Deere.

I think the argument/settlement for the newer B and BX models 1st scheduled HST oil change has been achieved via Kubota indicating that the owners manuals that came w/these newer models were wrong and that they recommend to change the HST fluid & filter @ the 50 hr mark. This has been verified by an authorized Kubota dealer and several posters who recieved reply's from Kubota regarding the conflicting info giving in the new B & BX owners manuals.......
Theres been no retraction from Kubota re. the 1st scheduled HST filter & oil change on the L series and up so unless there is a retraction, those owners should follow their manuals.

re. why 50 hrs and not 10 or 25?
Your guess is as good as mine but it could be possible that the Kubota engr's had discovered via trial and error that it takes approx 50 hrs for the B & BX model HST's to clear their systems of possible break in debris.
Maybe their studies showed it took 46.6 hrs or maybe 45.8, who knows, but my guess is the 50 hrs bench mark is just that, a benchmark when followed will ensure that they will honor their warranty should a fialure occur......

The L's and M's hold quite a bit more fluid, have larger filters and have larger hydraulic cooling systems so that may come into play on extending the life of the hydraulic fluid.
The BX uses a fan only to force air across the HST's pressurizing section and the B models have much smaller hydraulic oil cooling radiators than the larger tractors and when considering it's the heat that breaks down the hydraulic oils additive pkg's, it's probable the hydraulic oil in the B & BX models may run hotter than the larger tractors which causes the oil to lose it's lubricating and cooling properties sooner. But thats just a swag on my part...

Course, Kubota just may be just a geedy company and wants to sell us as much unnecessary hydraulic oil as possible, who knows

mswlogo · Aug 5, 2009

Volfandt said:
I think the argument/settlement for the newer B and BX models 1st scheduled HST oil change has been achieved via Kubota indicating that the owners manuals that came w/these newer models were wrong and that they recommend to change the HST fluid & filter @ the 50 hr mark. This has been verified by an authorized Kubota dealer and several posters who recieved reply's from Kubota regarding the conflicting info giving in the new B & BX owners manuals.......
Theres been no retraction from Kubota re. the 1st scheduled HST filter & oil change on the L series and up so unless there is a retraction, those owners should follow their manuals.

re. why 50 hrs and not 10 or 25?
Your guess is as good as mine but it could be possible that the Kubota engr's had discovered via trial and error that it takes approx 50 hrs for the B & BX model HST's to clear their systems of possible break in debris.
Maybe their studies showed it took 46.6 hrs or maybe 45.8, who knows, but my guess is the 50 hrs bench mark is just that, a benchmark when followed will ensure that they will honor their warranty should a fialure occur......

The L's and M's hold quite a bit more fluid, have larger filters and have larger hydraulic cooling systems so that may come into play on extending the life of the hydraulic fluid.
The BX uses a fan only to force air across the HST's pressurizing section and the B models have much smaller hydraulic oil cooling radiators than the larger tractors and when considering it's the heat that breaks down the hydraulic oils additive pkg's, it's probable the hydraulic oil in the B & BX models may run hotter than the larger tractors which causes the oil to lose it's lubricating and cooling properties sooner. But thats just a swag on my part...

Course, Kubota just may be just a geedy company and wants to sell us as much unnecessary hydraulic oil as possible, who knows