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  1. #31
    Gold Member lhansman's Avatar
    Join Date
    Sep 2005
    Posts
    310
    Location
    Alton, ON
    Tractor
    Kubota L45

    Default Re: L45 200 Hour Maintenance

    Me three.

    I am not an expert but to me the SUDT is not being used the same as hydraulic oil. Hydraulic oil is just pumped to the cylinders with minimal wear except for seals. Since the SUDT is doing this plus going through the HST+ transmission it would seem to me there is more of an opportunity for foreign matter from clutch discs and other components in the drivetrain to get in the SUDT. kubota didn't install three filters just for fun.

    I think it is false economy to go with cheaper lubricants on an expensive machine. I run synthetic lubricants in all my vehicles and machines from my Honda lawn trimmer to my 2012 F250 diesel. Synthetics have served me well for more than 30 years.
    Kubota L45, Laurin cab with heat and A/C, multiple hoe buckets and front buckets, hydraulic pallet forks, Grattex snow blade, 78" grapple, 78" Normand E78-240 snow blower, hydraulic thumb, auxiliary front hydraulics, rear remotes, work lights.
    Sold: Kubota B26, Kubota B21

  2. #32
    Platinum Member
    Join Date
    Jun 2005
    Posts
    849
    Location
    Central NH (God's Country)
    Tractor
    Kubota 1982 B7200 , L-39(2005) Kubota RTV 900 (2005) & Komatsu PC75UU2E(1997)

    Default Re: L45 200 Hour Maintenance

    Quote Originally Posted by lhansman View Post
    Me three.

    I am not an expert but to me the SUDT is not being used the same as hydraulic oil. Hydraulic oil is just pumped to the cylinders with minimal wear except for seals. Since the SUDT is doing this plus going through the HST+ transmission it would seem to me there is more of an opportunity for foreign matter from clutch discs and other components in the drivetrain to get in the SUDT. kubota didn't install three filters just for fun.

    I think it is false economy to go with cheaper lubricants on an expensive machine. I run synthetic lubricants in all my vehicles and machines from my Honda lawn trimmer to my 2012 F250 diesel. Synthetics have served me well for more than 30 years.
    GST on the L39 has a wet clutch also, but I am not to concerned about repacing synthetric hydraulic oil at 400 hours. I'll probably let mine go another 800 hours to 2500 Hours total or at 2500 Hours do an anaylsis. i do replace the filters every 800 hours or so and use the correct PN Kubota filters, not aftermarket as aftermarket like other Kubota filters may physically fit but not have the same internal reliefs and fiter media.

    Mistake No. 1 – Changing the oil

    There are only two conditions that mandate a hydraulic oil change: degradation of the base oil or depletion of the additive package. Because there are so many variables that determine the rate at which oil degrades and additives get used up, changing hydraulic oil based on hours in service, without any reference to the actual condition of the oil, is like shooting in the dark.

    Given the current high price of oil, dumping oil which doesn’t need to be changed is the last thing you want to do. On the other hand, if you continue to operate with the base oil degraded or additives depleted, you compromise the service life of every other component in the hydraulic system. The only way to know when the oil needs to be changed is through oil analysis.

  3. #33
    Super Member
    Join Date
    Sep 2000
    Posts
    6,548

    Default Re: L45 200 Hour Maintenance

    Quote Originally Posted by Bota4me View Post

    Now if they only made lifetime underwear lol

    You mean it's not???


    Oh great, now I have to start washing them, too!

  4. #34
    Platinum Member
    Join Date
    Oct 2010
    Posts
    665
    Location
    Northern, NJ
    Tractor
    Kubota L45

    Default Re: L45 200 Hour Maintenance

    Quote Originally Posted by lhansman View Post
    Me three.

    I am not an expert but to me the SUDT is not being used the same as hydraulic oil. Hydraulic oil is just pumped to the cylinders with minimal wear except for seals. Since the SUDT is doing this plus going through the HST+ transmission it would seem to me there is more of an opportunity for foreign matter from clutch discs and other components in the drivetrain to get in the SUDT. kubota didn't install three filters just for fun.

    I think it is false economy to go with cheaper lubricants on an expensive machine. I run synthetic lubricants in all my vehicles and machines from my Honda lawn trimmer to my 2012 F250 diesel. Synthetics have served me well for more than 30 years.
    Are there clutch discs in the HST trans? I thought there was just a pump and motor.

    ac

  5. #35
    Platinum Member
    Join Date
    Oct 2010
    Posts
    665
    Location
    Northern, NJ
    Tractor
    Kubota L45

    Default Re: L45 200 Hour Maintenance

    Quote Originally Posted by mike69440 View Post
    GST on the L39 has a wet clutch also, but I am not to concerned about repacing synthetric hydraulic oil at 400 hours. I'll probably let mine go another 800 hours to 2500 Hours total or at 2500 Hours do an anaylsis. i do replace the filters every 800 hours or so and use the correct PN kubota filters, not aftermarket as aftermarket like other Kubota filters may physically fit but not have the same internal reliefs and fiter media.

    Mistake No. 1 – Changing the oil

    There are only two conditions that mandate a hydraulic oil change: degradation of the base oil or depletion of the additive package. Because there are so many variables that determine the rate at which oil degrades and additives get used up, changing hydraulic oil based on hours in service, without any reference to the actual condition of the oil, is like shooting in the dark.

    Given the current high price of oil, dumping oil which doesn’t need to be changed is the last thing you want to do. On the other hand, if you continue to operate with the base oil degraded or additives depleted, you compromise the service life of every other component in the hydraulic system. The only way to know when the oil needs to be changed is through oil analysis.
    Who are you using for analysis? I am very interested in your experience.

    ac

  6. #36
    Super Member
    Join Date
    Sep 2000
    Posts
    6,548

    Default Re: L45 200 Hour Maintenance

    Quote Originally Posted by avc8130 View Post
    Are there clutch discs in the HST trans? I thought there was just a pump and motor.

    ac
    The brakes are wet disc. The HST is just pump and motor.

  7. #37
    Veteran Member CHDinCT's Avatar
    Join Date
    Jul 2008
    Posts
    2,233
    Location
    Connecticut
    Tractor
    Kubota BX25

    Default

    Quote Originally Posted by john_bud

    The brakes are wet disc. The HST is just pump and motor.
    The PTO might use a hydraulic clutch too.
    Chris

    2 acres and a mule, er, Kubota BX25, and too many other toys,er, tools to list.

  8. #38
    Platinum Member
    Join Date
    Jun 2005
    Posts
    849
    Location
    Central NH (God's Country)
    Tractor
    Kubota 1982 B7200 , L-39(2005) Kubota RTV 900 (2005) & Komatsu PC75UU2E(1997)

    Default Re: L45 200 Hour Maintenance

    Quote Originally Posted by avc8130 View Post
    Who are you using for analysis? I am very interested in your experience.ac
    I'm shooting in the dark. In the spring, I think I'll send the hydraulic oil out for one of those $25 dollar lab checks.

    I think I am reasonable about oil changes in general. It takes 9 gallons of Rotella to change engine oil in the 4 diesels, and 37 quarts of PAO synthetic to change the oil in the 3 bikes, 3 cars and 2 PU’s in our family of just 3 drivers. I’m not looking to do oil changes anymore than necessary. In the last 20 years, I never had a lubrication or engine wear issue by changing oil just based on look and smell.
    For instance I have a little Mazda 4 cylinders I beat the crap out of with 220 K miles that does not burn oil or have sludge build-up. The worst any engine had was a little varnish.

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