Deere 300d-310d hydrauic oil types?
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Thread: Deere 300d-310d hydrauic oil types?

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    Deere 300d-310d hydrauic oil types?

    Our deere 300d has been leaking hydraulic oil from the outriggers. It has been low on oil a few times, so we have just been putting superS hydrauic fluid in it, but we don't know if it's the rough oil or not. Unfortunately we didn't get a manual with the backhoe. So any help with figuring out what oil this beast uses would be greatly appreciated.
    If it's free ... its going to cost a stack of green in parts.
    Our herd:
    1974 JD 140 H3
    1986 JD 316
    1970 JD 140 H3 patio yellow
    1986 JD 330 diesel Three point, loader
    Cub cadet 1250
    Attachments:
    mower decks
    various blades
    Orig. #50 cart, nice BT & Work FT #80 carts,
    Many wheel weights
    Very nice Brinly kk-200 planter
    (Brinly) CC-500 cultivator, plows 7x, dd-1200 disk
    IH carts
    Pincor 4500w generator
    JD 542 front pto

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    56FordGuy's Avatar
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    From the manual:



    Deere recommends Hy-Guard or low viscosity Hy-Guard depending on your temperature range, but any hydraulic oil that meets the J20 spec should work.

    As for your leaking cylinders, if they're leaking around the ram then they will need to be disassembled and resealed. Changing oil types won't fix it, but it probably didn't cause it either. Check the rams for damage, any nicks or scratches could have damaged the seals. If they're okay, it may be as simple as the seals are old and worn.
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    Quote Originally Posted by 56FordGuy View Post
    From the manual:

    Deere recommends Hy-Guard or low viscosity Hy-Guard depending on your temperature range, but any hydraulic oil that meets the J20 spec should work.

    As for your leaking cylinders, if they're leaking around the ram then they will need to be disassembled and resealed. Changing oil types won't fix it, but it probably didn't cause it either. Check the rams for damage, any nicks or scratches could have damaged the seals. If they're okay, it may be as simple as the seals are old and worn.
    Thanks Blake, i believe i saw some spec numbers on the bucket. Our cylinders (bucket dump, outriggers, swing -cylinders, and a few lines) all leak. Although it was used by a private contractor for most of its life, so a lot of the bushings are wore out, and we have replaced a lot on it. But she gets the job done, so i guess that`s all that matters. I also find it easier to run than our case 580 with the five lever setup
    Last edited by DownNdirt; 10-31-2016 at 09:52 PM.
    DRobinson and 56FordGuy like this.
    If it's free ... its going to cost a stack of green in parts.
    Our herd:
    1974 JD 140 H3
    1986 JD 316
    1970 JD 140 H3 patio yellow
    1986 JD 330 diesel Three point, loader
    Cub cadet 1250
    Attachments:
    mower decks
    various blades
    Orig. #50 cart, nice BT & Work FT #80 carts,
    Many wheel weights
    Very nice Brinly kk-200 planter
    (Brinly) CC-500 cultivator, plows 7x, dd-1200 disk
    IH carts
    Pincor 4500w generator
    JD 542 front pto

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