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  1. #1

    Join Date
    May 2002
    Posts
    27
    Location
    Cal
    Tractor
    Yanmar 1500D

    Default Hydraulic Fluid

    I drained the hydraulic-gear fluid out of my Yanmar 1500D that I purchased recently and was a bit shocked at what came out. I am not sure exactly what I expected but the fluid was a brownish yellow and had clumps that felt like the consistency of fine dirt. What can I use to flush the gear box out to remove any lingering yuk before I refill it?

  2. #2

    Join Date
    Apr 2001
    Posts
    388
    Location
    Southern Maryland
    Tractor
    L3010DT

    Default Re: Hydraulic Fluid

    Gerlacr,

    About the best thing for that is kerosene. Don't use diesel and DON'T use gasoline. Kerosene is light enough that it will act as a solvent, cleaning agent, but should completely drain out of the transmission, with the lingering yuk. With the kerosene in there, you could briefly operate it (a few minutes) to circulate all bearings and gears. After that, drain the kerosene, refill with fresh cheap oil, operate for long enough to get it hot, and drain again. Then put in good oil and your good to go.

    One has to wonder where the yuk came from and if any damage has been done to bearings, etc. For your sake I sure hope not.

    Having said all the above, I am not a professional mechanic, but I have played one on TBN.[img]/w3tcompact/icons/laugh.gif[/img]

    Nick

  3. #3

    Join Date
    Mar 2002
    Posts
    116
    Location
    Frozen North, Michigan
    Tractor
    Several Antique Garden tractors

    Default Re: Hydraulic Fluid

    I am a practicing mechanic (Drs practice so why can't we).
    Nick said it all. I have used diesel fuel to do the same thing however. I have also done the same thing to flush contamination out of an engine.
    Bill

  4. #4

    Join Date
    Apr 2002
    Posts
    874
    Location
    Monroe,Washington
    Tractor
    New holland TC29-9x3 Woods 1012 FEL, Woods, 7500 Backhoe / Kubota L345DT 4WD, Kub FEL, Kub Backhoe

    Default Re: Hydraulic Fluid

    A word of caution on the use of kerosene. It may effect some of the newer hydraulic seals used in cylinders. Some seals are may become to soft allowing bypass and reducing their useable life.

  5. #5

    Join Date
    Jan 2001
    Posts
    2,518
    Location
    Capital District, Upstate New York
    Tractor
    Satoh S650G, MF135, MF165, JD5205

    Default Re: Hydraulic Fluid

    <font color=blue>...What can I use to flush the gear box out to remove any lingering yuk before I refill it? ...</font color=blue>

    I'd be careful of the kerosene/diesel fuel incompatibilities with internal seals... or you could open up a real can of worms for the future... [img]/w3tcompact/icons/eyes.gif[/img]

    Instead, I would use "more" hydraulic fluid you can pick up @ Walmart or Sams Club for say ~~$11. for a 5 gallon pail... run the unit for a few hours with that and drain it and replace with the factory recommend fluids... [img]/w3tcompact/icons/smile.gif[/img]

  6. #6

    Join Date
    May 2002
    Posts
    27
    Location
    Cal
    Tractor
    Yanmar 1500D

    Default Re: Hydraulic Fluid

    I'm not sure about your parts of the country, but out here in Southern Cal, Walmarts don't carry hydraulic fluid. I live in a predominately metropolitan area. The only place I have found it is at tractor dealers and the going price appears to be in the range of $28 for a five gal pail. I guess I'll just have to bite the bullet and spend a few bucks on fluid.

    Thanks for the advice.

  7. #7

    Join Date
    May 2002
    Posts
    1,064
    Tractor
    Yanmar 1500D

    Default Re: Hydraulic Fluid

    If you can't get cheap hydraulic fluid to do it, get cheap transmission fluid.

  8. #8
    Bronze Member
    Join Date
    Apr 2002
    Posts
    68
    Location
    Idaho
    Tractor
    Kioti CK35

    Default Re: Hydraulic Fluid

    My grandfather had an old 6 cyl. Chevy (1949 I think). Every oil change he would add a gal of diesel, start and idle it a minute; drain again and fill 'er up with fresh oil. That old car ran like a Swiss watch!

  9. #9
    Super Member
    Join Date
    Apr 2000
    Posts
    6,181
    Location
    central New York
    Tractor
    all makes and models

    Default Re: Hydraulic Fluid

    I like John Millers answer to your problem. Definitly use Hydraulic oil only! Fill to appropriate level use for an hour or so and pull the filter and see what you have. If totally contaminated again, start over until you get a good sample.

  10. #10
    Veteran Member
    Join Date
    Nov 2000
    Posts
    1,720
    Location
    Columbia county NY
    Tractor
    87 Ingersoll 444, 84 Ingersoll224/'44 GreavlyL/60'sGreavlyL/49 Ford 8N

    Default Re: Hydraulic Fluid

    try looking tn an auto parts store, a lot sell it also.

    JMIII,
    Your right on the mony. I do the same thing when I am working on an old car. If the motor needs cleaning out, I get out what I can, then fill it up with cheep oil, and run it for a bit. Drain it, and replace the filter, and your ready to go.

    One more thing. When you drain it out, make sure its warm. That will floot out more crud.

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