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  1. #1

    Default Milky Transmission / Hydraulic Fluid Kubota 6100

    Hello All,

    My "new to me" kubota 6100 was kinda grinding into gears this last week so I checked the transmission / hydraulic fluid and it was VERY milky. I changed out the fluid and the new fluid is looking a little milky already. I suppose that is too be expected with the old fluid so contaminated. The transmission stopped grinding so I will probably run it a bit then flush the fluid one more time.

    My question is -- Does the water contamination indicate a radiator leak like a car or could it all just be condensation / water intrusion? I tried to take a peak but did not see a line running from the tranny to the radiator. Am I missing something?

    Dan

  2. #2
    Elite Member dex3361's Avatar
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    Default Re: Milky Transmission / Hydraulic Fluid Kubota 6100

    Air bubbles can look milky in the oil. Take a small container of your trans/hydraulic oil in a clear container and let it sit for a day or 2 and see if the oil clears up. You can also do a crackle test on the oil to see if it is moisture. Crackle Test You may have a suction side leak allowing air to get mixed into the oil and turning it milky. Moisture can enter into the trans/hydraulic oil by leaking in around the gear shift boots if the tractor is left out in the weather.
    Randall



    1Timothy Chapter 2:
    3 For this is good and acceptable in the sight of God our Saviour;
    4 Who will have all men to be saved, and to come unto the knowledge of the truth.
    5 For there is one God, and one mediator between God and men, the man Christ Jesus.
    From: The HOLY BIBLE

  3. #3
    Super Member
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    Default Re: Milky Transmission / Hydraulic Fluid Kubota 6100

    Most mositure in transmissions and rear end is from the hot cold with changing season exchanges.

    For your condition it will take two changes, we normally use a cheap oil the first time so not to waste to much. We do recommend changing oil out every two years to three regardless of quality of oil or hours used do to condinsation.

  4. #4

    Default Re: Milky Transmission / Hydraulic Fluid Kubota 6100

    Thanks for the replies. Glad to know it is most likely just condensation. I have no idea when the fluid was last changed. Wish I would not have spent the little extra on the fluid for "older tractors" now that I will just have to flush it again in a week or two.

    Do you dispose of your hydraulic fluid with regular waste oil?

  5. #5
    Silver Member Denwa's Avatar
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    Blaine WA
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    Kubota B20

    Default Re: Milky Transmission / Hydraulic Fluid Kubota 6100

    Quote Originally Posted by tcnjdeluca View Post
    Hello All,

    My "new to me" kubota 6100 was kinda grinding into gears this last week so I checked the transmission / hydraulic fluid and it was VERY milky. I changed out the fluid and the new fluid is looking a little milky already.......

    Dan
    Dan,
    There are several fluid systems in a tractor, as an apparent new owner of an old machine, it would be very wise to change ALL the fluids and filters asap.
    Apparently the previous owner was a tad slack on maintenance.

    Gears will tend to grind when the submerged in water as opposed to the oil
    that is floating on top of same.

    You could even change the air in the tires if you want to go all the way. ;' >

    Have fun,
    Dennis (WA)
    Dennis - Blaine WA - NX7D
    91' Kubota B20 - FL420 - BH750 - 3' brush mower wanted
    JD LX130 Lawn Mower
    BMW R100GSPD R100/7 R100RT
    32RL Alpenlite w/ 06' Ford 350 4x2 (or is that 2x4)

  6. #6
    Silver Member Dusty1's Avatar
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    Athens, OH
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    John Deere 410 LBH

    Default Re: Milky Transmission / Hydraulic Fluid Kubota 6100

    I always take my used oil to Autozone, they take it no problem, but only 5 gal per day, and somthing like 10 Gal max per week.

  7. #7
    Elite Member
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    Default Re: Milky Transmission / Hydraulic Fluid Kubota 6100

    Water sounds like your problem, also sounds like you are in the process of clearing it up.

    Waste oil can be taken to most auto stores, auot zone, advance, even walmart, BUT if it has signs of water in it they may turn you away?????

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