Milky hydraulic fluid after change

[showcrop]

To help control moisture in transmission case be sure case vent isn't clogged

Plugging the vent would be a pretty tough task.

 

[Janicholson]

This might be a dumb question but would it be possible to add a bottle or two of gas dryer to the old oil a few hours before draining it?

The material in a fuel additive for "dry Gas" is often alcohol. Either Methanol, or Ethanol. It would not help getting rid of water, it would help suspend the water, and contaminate the hydraulic system with alcohol. Removing the oil and heating it will remove the water. There will be residual moisture from the components and pipes/hoses not drained. The answer is running the tractor enough that the oil gets warm/hot and evaporates the residual water after a change. Jim

 

[dhermesc]

That's my thought too, My JD dozer will aerate the transmission oil to look just like the oil shown in the op's post, one way to check if it IS water is let it set for a day or two and crack the drain plug and see if water comes out in any meaningful amount. I've dumped good oil before not realizing it was just aerated. If it is indeed water it's always better to get it out than leave in in though.

That is what it looked like to me also. To have that much water left in the system after draining to turn new oil that milky doesn't seem possible. I assumed aeration as being the cause.


Now for oil to be aerated like that after a short run - is that a sign the oil is too thin? I can only imagine what it would look like if run for hours and allowed to get really hot and thin.