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  1. #1
    Platinum Member
    Join Date
    Aug 2001
    Posts
    990
    Location
    Winchester, New Hampshire
    Tractor
    Kubota L3000

    Default Transmission hydraulic fluid change

    The time had come to change the transmission hydraulic fluid on my kubota L3000DT. I stopped at the nearest Kubota dealer to check out the price of UDT, which is what my manual suggested. There was a slight degree of sticker shock when the parts attendant told me a 5 gallon pail was going for $75.00 and change.

    I did some searching and found an oil made called Ultra Trans 245 made by (sp) Amailee at a local auto parts store that meets the specs for UDT and Super UDT Kubota oil. After my discount a five gallon pail costs about 40% less than the Kubota UDT. I needed two 5 gallon pails to change the transmission and front differential fluids so the savings were significant.

    On this particular tractor there is a screen type filter inside the rear end housing which all the hydraulic oil has to pass through. The manual tells you to remove and clean the metal shavings from the filter element . Well, I was shocked to see how many little metal particles where stuck in that filter. I bet the filter was over 50% blocked with these particles.

    After putting everything back together I could notice a difference in the speed of the hydraulics. I was a few hours over the 400 hour mark when I changed my oil and thought it may have been unnecessary, but not any more.

    It would be nice if there was an external filter system that could be changed a little more frequently.

    Randy

  2. #2
    Gold Member Happyman's Avatar
    Join Date
    Jun 2008
    Posts
    477
    Location
    Kents Store, Virginia
    Tractor
    Kubota Grand L 3940

    Default Re: Transmission hydraulic fluid change

    The newer models use an external filter, like, an oil filter.
    Glad you're up and running again at full spee!
    Grand L3940 HST, Wallenstein BX62 chipper, Woods GTR72 tiller, Woods BH90-X backhoe, 724 FEL, forks, 1000lb PTO rotary spreader, Woods PRD8400 finish mower, Leinbach 7' landscape rake, United 7' box blade, Pequea 80 bushel manure spreader, Woods 7' Brush Hog.

  3. #3
    New Member
    Join Date
    Feb 2010
    Posts
    9
    Location
    Lower Delaware
    Tractor
    Kubota B2710

    Default Re: Transmission hydraulic fluid change

    What are you using for the front axle? I recently changed mine and used 5qts of 90w gear oil from the local auto parts store for about $25. Enjoy!!!

  4. #4
    Platinum Member
    Join Date
    Aug 2001
    Posts
    990
    Location
    Winchester, New Hampshire
    Tractor
    Kubota L3000

    Default Re: Transmission hydraulic fluid change

    Quote Originally Posted by lennyb99 View Post
    What are you using for the front axle? I recently changed mine and used 5qts of 90w gear oil from the local auto parts store for about $25. Enjoy!!!

    The front differential originally came filled with kubota UDT. I have been using the same fluid but did notice that 90W gear oil can be used instead. I use the tractor in the winter to keep the driveway clear of snow and it can get cold here in New Hampshire so I have stayed away from the thicker gear oil.

    Randy

  5. #5
    Silver Member
    Join Date
    Aug 2009
    Posts
    238
    Location
    SC
    Tractor
    Kubota BX24

    Default Re: Transmission hydraulic fluid change

    On my BX24 I have both the external hydraulic transmission oil filter and the screen type that should be cleaned every time the hydraulic fluid it changed.

  6. #6
    Veteran Member David_Kb7uns's Avatar
    Join Date
    Aug 2005
    Posts
    1,002
    Location
    Willamette Valley Oregon
    Tractor
    Kubota X 4

    Default Re: Transmission hydraulic fluid change

    If it is a gear transmission the UDT or Super UDT is not as critical, where the Super is really needed is colder areas with HST or GST transmissions.

    David Kb7uns
    Grand L3130GST LA723 Loader, ATI grapple, ATI grapple bucket, WR Long front remote, Kubota rear remotes, Bradco 408 Backhoe with thumb, 60"KK brush hog, 60" RM Finish Mower, Speeco Post Auger, 72" KK rear blade, 60" box blade
    BX2230 LA211, RCK60, GCK60 Bagger,42"Land Pride Tiller, XB BB, XB RB, rake, Fimco 3PT sprayer
    G2160 RCK60 Mower
    RTV1100 Orange, Work Lights, Front Rear Winch,Rear Screen, High Mount air cleaner, water seperator
    2010 Polaris RZR 800 S
    2007 CAN AM Outlander 800 LTD

  7. #7
    Silver Member
    Join Date
    Feb 2010
    Posts
    146
    Location
    Ontario, Canada

    Default Re: Transmission hydraulic fluid change

    Quote Originally Posted by Happyman View Post
    The newer models use an external filter, like, an oil filter.
    Glad you're up and running again at full spee!
    They also have an internal too.

    df.

  8. #8
    New Member Teleskiah's Avatar
    Join Date
    Sep 2008
    Posts
    24
    Location
    Caribou, Maine
    Tractor
    Kubota B7610

    Default Re: Transmission hydraulic fluid change

    Good morning. I started draining all the fluids on my 2002 kubota l3000dt with lb402loader which is hydaulicly plumbed from behind the seat. My question is later today i plan on replacing the fluids and i am confused by the manual. The manual states that there are two fill points, one directly over the transmission and the second behind the seat, which i have found both, but the manual does not differentiate how much fluid goes in each compartment, it states roughly 7.4 gallons total. Can someone please elaborate on how much the trani case takes and how much the hydro reservoir takes?
    Or am i misunderstanding this? Do i only need to add hydro oil to behind the seat and from there the trani case also receives the oil???

  9. #9
    Elite Member Baby Grand's Avatar
    Join Date
    Nov 2007
    Posts
    3,281
    Location
    Windsor, CT.
    Tractor
    L3240GST, B2320HST, B5100D & G5200H

    Default Re: Transmission hydraulic fluid change

    I suspect that what you have is two places to fill a single bearing compartment that shares oil with your transmission, final drive, PTO and hydraulic system.
    So you'd be correct that:
    ... i only need to add hydro oil to behind the seat and from there the trani case also receives the oil???
    That's how all of our machines are configured.
    That's the problem with trouble.
    It always starts out as such fun."
    - Randall Brown

  10. #10
    Veteran Member gwdixon's Avatar
    Join Date
    Jul 2009
    Posts
    2,396
    Location
    Northern CA

    Default Re: Transmission hydraulic fluid change

    Baby Grand has it right. There are usually a couple of fill point for the single hydraulic reservoir. Use the one that is easiest to access with your fill method.

    Similarly, there are multiple drain points on most tractors. However, I would suggest opening all drain points to ensure the old oil is removed along with the gunk that sits on the bottom of the case.

    Especially look for drain points for the wet brakes if so equipped.
    2009 Kubota M7040, R1s, LA1153 FEL, fork lift, 3 rear remotes, T&T
    2002 Kubota L48 TLB, 12", 18", 24" HD buckets
    2001 Kubota BX2200, Turf, LA211 FEL
    7.5' Howse 3PT disc, 88" Gearmore 4G4 box scraper, 4' box scraper, Gearmore GB85 blade, LandPride RCR2596 cutter, 6', 4' flail mowers, 6', 4' rototiller, 4' Bush Hog cutter, HD subsoiler, Bearcat 70554 chipper, Bush Hog PHD w/ 12", 6" augers, Ford 101 3-bottom plow, 8' land leveler, 6' rake, lots of misc.

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