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  1. #1
    Bronze Member jlsanborn's Avatar
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    May 2010
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    70
    Location
    Spokane, WA
    Tractor
    Kioti CK20S Gear

    Default Front Diff Oil

    Dealer performed my 50hr out of courtesy, less the front axle. When he was here delivering my tractor I asked what to put in there and he said tractor hydraulic oil. I recently got my owner's manual which says gear oil (which I would have guessed). What are the rest of you putting in there?
    "It's a dog-eat-dog world and I'm wearin Milk Bone underwear"

  2. #2
    Elite Member Gittyup's Avatar
    Join Date
    Oct 2007
    Posts
    3,078
    Location
    Mid Atlantic
    Tractor
    Kioti CK25 Shuttle Shift, loaded tires, JD X739

    Default Re: Front Diff Oil

    The new oil was hydraulic fluid. I was advised to replace it with 90 weight gear oil at the 50 hours service. So, that's what's in it. So far so good, about 450 hours, second 90 weight change out.

    Search here. It's been discuss a bunch. Make sure you get it full.

  3. #3
    Member
    Join Date
    Sep 2010
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    25
    Tractor
    Kioti DK50se

    Default Re: Front Diff Oil

    90w as well.

  4. #4
    Elite Member Dmace's Avatar
    Join Date
    Oct 2005
    Posts
    3,838
    Location
    Wakefield, NH
    Tractor
    Kioti CK20 HST

    Default Re: Front Diff Oil

    I would think tractor hydraulic oil would be too thin. I would stick with the 90w gear oil.
    Derek
    Kioti CK20HST
    KL120 FEL // KB2365 BH // 60" JRW 3ph snowblower // 48" HD Boxblade
    Sims-Cab Depot heated cab
    Quote Originally Posted by DiamondPilot
    Now it's time for Ford and GM to step up

  5. #5
    Platinum Member
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    Jun 2008
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    Default Re: Front Diff Oil

    My manuals call for UTF, I guess if it is good enough for the tranny and rear it should work in the front differential.
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    John Deere 4700 - FEL & Backhoe
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  6. #6
    Veteran Member
    Join Date
    Mar 2005
    Posts
    1,734
    Location
    Erie, Pennsylvania
    Tractor
    Kioti CK30HST

    Default Re: Front Diff Oil

    80w-90 gear oil. Recheck your oil level after moving the tractor a few hundred yards.

  7. #7
    Bronze Member jlsanborn's Avatar
    Join Date
    May 2010
    Posts
    70
    Location
    Spokane, WA
    Tractor
    Kioti CK20S Gear

    Default Re: Front Diff Oil

    Gear oil it is! Thanks all.
    "It's a dog-eat-dog world and I'm wearin Milk Bone underwear"

  8. #8
    Silver Member
    Join Date
    Feb 2009
    Posts
    183
    Location
    NENC

    Default Re: Front Diff Oil

    Quote Originally Posted by Dmace View Post
    I would think tractor hydraulic oil would be too thin. I would stick with the 90w gear oil.

    UTH is typically in the 30 weight range, 80w-90 is in the 40 weight range. The additives would matter more and the 40C viscosity. Normal use will not generate enough heat to reach the higher 100C viscosity.

    40C = 104F
    100C = 212F

  9. #9
    Elite Member
    Join Date
    Oct 2006
    Posts
    4,268
    Location
    Ohio
    Tractor
    GC2310,

    Default Re: Front Diff Oil

    Gear oil with the EP, (extreme pressure), designation offers the highest level of protection. This is also available in a synthetic formulas for a reasonable price.

    But, good hydraulic oil also works. That's why the factories are using it.

  10. #10
    Silver Member
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    MichiganIron's Avatar
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    May 2008
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    550
    Location
    Central Michigan
    Tractor
    Full line of KIOTI Tractors, BEFCO and Worksaver Implements

    Default Re: Front Diff Oil

    Up here, we use Shell Donax Hydraulic Fluid. There are several small cavities for the front axle fluid to move through. The lighter hydraulic fluid seems to perform better in the colder climates. It doesn't get the benefit of warm-up from the tractor.
    Michigan Iron and Equipment, LLC
    www.michironandequip.com

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