Transmisson problem: Kubota Review  -- Kubota Tractors Discussion Forum and Review Transmisson problem: Kubota Review -- Kubota Tractors Discussion Forum

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 12-23-2004, 20:56 Post: 102848
evad102a



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 Transmisson problem

My father has a 4310 HST. He recently replaced all the fluids and filters. Since then the tractor is very slow when moving forward, reverse seems to be a bit faster than before the oil change. The FEL, 3 point hitch operate correctly. The oil and filters are factory approved. Has anybody has similar problems?






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 12-23-2004, 21:25 Post: 102855
Art White



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What does factory approved mean?






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 12-24-2004, 05:43 Post: 102870
evad102a



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 Transmisson problem

The oil is Kubota's UDT and the filters are OEM. The strainer was removed also, it had a few bits of aluminum. Not sure about the tractors hours but it's 4 or 5 years old.






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 12-24-2004, 10:06 Post: 102880
Chief



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 Transmisson problem

Below is a link to a post that covered vicsosity of UDT as compared with Hygard and Chevron All Weather Synthetic Trans. Fluid. In a nut shell, Kubota UDT has a higher viscosity that Deere Hyguard. This may be why your father's 4310 hydro. trans operates slower. You said you have already checked and replaced the suction screen so there is a good chance it is the viscosity of the oil. The hydraulics are not near as picky as the hydro. If the tractor is 4 or 5 years old; it is most likely a 4300. In your neck of the woods, I would suggest using the Deere Low Viscosity Hyguard or if UDT is all that is available to you; use the Super UDT. Super UDT is very close to the same viscosity as the Deere fluids. Good luck!






Link:   UDT vs Super UDT 

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 12-24-2004, 10:57 Post: 102882
DRankin



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 Transmisson problem

I think I lost the numbers when the lap-top crashed, but I remember doing a direct comparison with 3 or 4 different oils.

The result I remember was that Super UDT is, by far, the lowest viscosity hydraulic oil I have seen.

I have had two similar experiences now with hydraulic oils affecting performance in Kubota HST's

In the first instance I replaced the Super UDT with Chevron Synthetic in my BX22. The tractor slowed down noticeably.

The second instance was this month when I replaced the dealer installed Hy Tran in my RTV 900 with Super UDT. There was a noticeable improvement in performance despite the fact that the weather was much, much colder.

Bottom line: The viscosity numbers differ enough between UDT(or any standard hydro-oil) and Super UDT to account for the missing performance in your tractor. Plus, I have experienced the same sort of problems going from one to the other.

If you expect top performance, the only thing to put in a Kubota HST is Super UDT.






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 12-24-2004, 15:54 Post: 102894
evad102a



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 Transmisson problem

Thanks very much for the information. We will be replacing the oil next week. I will let you know how we made out.






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 12-25-2004, 09:58 Post: 102907
Art White



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Don't use JD's hygaurd if you can get the super udt! I'd only use that in case of emergency and would change it as soon as possible. Your results would be the same as udt's.






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 12-28-2004, 17:38 Post: 103095
dedeye



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 Transmisson problem

Can anyone explain what the difference is in hydraulic fluid viscosity between going forwards and backwards.
I thought evad102a was only noticing a problem going forward.
.... Trans problems and Kubota... Who'd of thunk it!!!!
This sounds like a song I've heard before...
Dedeye






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 12-29-2004, 06:31 Post: 103113
Art White



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Good point, but I still wouldn't make any adjustments or attempt to rememdy a problem until I knew the unit was given every chance to operate the right way. If it was just UDT and a Kubota filter then something else might be entering into it with the F-R petal. Normally for what the problem seems the neutral would also be out of place!






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 12-29-2004, 07:47 Post: 103115
ncrunch32



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 Transmisson problem

Is this discussion about a Kubota L4310 or a JD 4310? It seems that 2ndHandLion is addressing this post as a JD4310 tractor and Art, Dedeye are viewing this as a Kubota tractor. Since this is in the Kubota discussion I would expect it to be a Kubota tractor. However the post says HST and the Kubota L4310 is not an HST tractor, correct?






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Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

Thread 102848 Filter by Poster:
Art White 6 | Chief 2 | dedeye 1 | DRankin 3 | evad102a 5 | grassgod 2 | kwschumm 1 | Murf 6 | ncrunch32 1 | TNCHRIS 1 |




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