Water in HYD oil

Oldmax · Jan 11, 2010

What can you do when you have water in the HYD oil in tractor. How can it be flushed out.

kyhayman · Jan 11, 2010

Depends on how much water and what type of system. I've cleaned out a Long with 2 diesel fuel flushes in the system and then filled with clean fluid. Seemed to do perfectly. My Case 850 dozer I've drained flushed, changed, drained, and done it again. Cant seem to get it all out.

Jiles · Jan 11, 2010

If you have time-----water will settle to bottom. I did a Case backhoe that way and the oil looks only slightly grey. Four years and no problems.

Case e · Jan 11, 2010

after you get it back in shape keep it under a roof!

Oldmax · Jan 11, 2010

I don't have that problem but my Brother-n-law does. he lives in Texas county MO. He has a 75 HP kobeta Has been having some problems over the last two weeks with it. At first he said the oil looked good then he called back and said it was milkey. He thinks he left the suckion line loose when working on PTO clutch last fall. I told him if he did it might just be air in fluid. He isn't on this forum so I thought I might pass the problem by some of you and see what you think. Thanks for your answers.

Anonymous-0 · Jan 12, 2010

Just try keeping it to a minimum. Boiling the water out annually seems to help (be careful). I've heard even the pros have this problem (wind turbines).

showcrop · Jan 12, 2010

The housing is probably vented to allow for expansion/contraction with use. As it heats up with use condensation is driven off. I have a fork lift that gets really warmed up only on rare occasions and gets moisture in the motor oil. I have to have it under load for 45 min. to get it heated up enough to drive the moisture out. A friend who was a long time tech on them told me that they just tend to be that way so work it harder more frequently.One of my tractors has a vent that the mud daubers plugged which of course kept the moisture in. You will get just as much moisture weather it is kept under cover or outside. Even in midsummer you can have a warm front come through and you can get condensation all over your castings even indoors.

Ecnerwal · Jan 12, 2010

My backhoe has a capacity somewhere in the 21 gallon range, so flush and fill is an expensive option. I used to work at a place that had a nice vacuum filter arrangement that would make that more palatable (you could clean up the oil and put it back in) except it likely cost more than the backhoe did.

If there are breather filters and/or oil filters, keep them in good shape, but the main thing is to use the hydraulics enough to get the oil hot, which will boil off the water.

If the system is small enough (or your pockets are deep enough) you can do a few fluid changes, but without moving to a dry climate or providing a dehumidified sealed tractor shed, water will be right back in there with any wet weather - even if the tractor is under cover. If there's a breather vent/filter opening, you might be able to rig a way to park a can or bottle of dessicant on that when you know you won't be using the tractor for a while.

Water in HYD oil

Oldmax

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kyhayman

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Jiles

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Case e

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Oldmax

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Anonymous-0

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showcrop

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Ecnerwal

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