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Tractor Talk Discussion Forum

water in hydraulic oil

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wetoil

01-01-2005 19:14:58




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i have a bunch of hydraulic oil with water mixed in with it and i was wondering if any of you guys have any advice on how to remove it, as its pretty new oil and i would hate to have to waste it.

i have thought of these so far:
1/ let it sit and drain the oil off the water
2/ get a heater (electric element type) and heat the oil to about 220F and boil the water out
3/ some type of filter

im not sure if i can get it to the quality i want by just letting it settle, as i would like to get all the water out if possible. plus it may take longer than i want. right now it is milky and does not seem to be setteling out too quick.

thanks

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jayman

01-02-2005 20:57:28




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 Re: water in hydraulic oil in reply to wetoil, 01-01-2005 19:14:58  
I did a search in google and found this article on separating water out of hydraulic oil:



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Dean Barker

01-02-2005 20:07:30




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 Re: water in hydraulic oil in reply to wetoil, 01-01-2005 19:14:58  
Many have given you good advice; dispose of the contaminated oil and use new. Depending on the additives in the oil, you can never get all the water out. If you have milky oil, you have at least 5% water which would be about 2 1/2 gallons in 50 gallons of oil. Water in hydraulic oil does all sorts of nasty things to the additives.



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matthies

01-02-2005 19:22:43




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 Re: water in hydraulic oil in reply to wetoil, 01-01-2005 19:14:58  
This is just a thought, and never tried, put in buckets and freeze it. Remember water settles to the bottom and when frozen pour the oil off. Any way I always wait for a cold day before I take my used oil in to the local shop to burn in their furnace, that way they won't get any water in their system from me. chris



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DRD

01-01-2005 21:39:38




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 Re: water in hydraulic oil in reply to wetoil, 01-01-2005 19:14:58  
We just went through 6 weeks of Hydraulics in tech school. My advice to you would be to get rid of it. The hydraulic oil has the ability to absorb a certain percent of water,which is bad news. You will not get all the water out of the oil.



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TomTX

01-01-2005 20:54:52




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 Re: water in hydraulic oil in reply to wetoil, 01-01-2005 19:14:58  
Get rid of it. Install new oil, watch for "any" amount of oil, change again. Cheapest thing you can do is to use clean, quality lubricants. Why not spend a nickel now and not be found crying around the coffee shop about some expensive repair in the future. I have a brother-in-law who is constantly saving nickels on maintenance and lubricants and keeps spending the big bucks down the road.



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T_Bone

01-01-2005 20:19:17




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 Re: water in hydraulic oil in reply to wetoil, 01-01-2005 19:14:58  
Hi wo,

I seperated 10gal 2yrs ago by letting the oil sit in 5gal buckets with a plastic trash bag over the top of the bucket.

Sorry I can't tell you how long it took as I let it sit a year without looking at it. It looked like new oil tho, very clear, and lots of water on the bottom plus alot of other junk (piston seals).

You might do a search on the Tool forum as I made a post there with some other good responses from the guys. (found it quit looking)

T_Bone

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Davis In SC

01-01-2005 20:13:57




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 Re: water in hydraulic oil in reply to wetoil, 01-01-2005 19:14:58  
I am far from a hydraulics expert, but I have observed that oil & water tend to emulsify, due to detergent additives & being compressed in pump vanes/pistons. Unlike salad dressing, they do not completly separate. Best to discard oil , flush & replace with new... Regards, Davis



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T_Bone

01-01-2005 20:28:46




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 Re: water in hydraulic oil in reply to Davis In SC, 01-01-2005 20:13:57  
Hi Davis,

You guys type too fast...lol

I'm not sure about hydraulic oil but diesel contains 500ppm or less of water, it's considered clean to ASTM standards.

At 1000ppm, water seperates from diesel and you need to drain the fuel filter.

I would think hydraulic oil wouldn't be that much different from diesel when it comes to water ? I have no idea.

T_Bone



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Davis In SC

01-01-2005 20:44:40




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 Re: water in hydraulic oil in reply to T_Bone, 01-01-2005 20:28:46  
T-Bone , TY for compliment, I am a slow typist, right index finger only... What I was basing my comments on was an incident with an injection molding machine. The heat exchanger sprung a leak, letting quite a few gallons of oil get into hydraulic oil. Idiot Plant Manager said to keep machine running, after several days oil turned into a white, foamy, jelly-like smelly goop. For the next year, we spent tens of thousands on oil changes, new pump cartridges, rebuilding valves etc. It is my understanding that as oil enters vanes of a pump, under a vacuum, water in oil will boil, causing all kinds of nasty effects to the oil , as well as the pump. All in all oil is cheap. Regards, Davis

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skycarp

01-01-2005 20:03:17




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 Re: water in hydraulic oil in reply to wetoil, 01-01-2005 19:14:58  
How much is "a bunch?"

1. There are hazmat pads that will remove water from oil. Two terms you need to know more about, ADSORBENT, and ABSORBENT. Try here:
Link
s/absorbent-pads.htm

2. Do not heat the oil to the boiling point of the water. When water trapped in oil reaches its boiling point, it will release all at once in the form of steam, which you cannot control. This is not a good thing. BTW, as you rise above sea level, the boiling point of water is less than 212 degrees.

3. See 1 above.

If it were me with contaminated oil, I would take it to a waste oil recycler and forget about it.

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oldart

01-01-2005 19:36:23




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 Re: water in hydraulic oil in reply to wetoil, 01-01-2005 19:14:58  
to remove the water from the oil wil cost a lot and you still have contaminated oil buy new and put clean safe oil in your machine .checkwhere the water got in and repair the leaks . many times the shift levers seals have cracks in them.
art



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Ol Chief

01-02-2005 15:22:36




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 Re: water in hydraulic oil in reply to oldart, 01-01-2005 19:36:23  
I do not mean to go against all of the other advice here but I have had the same experience as T-Bone. All together I have 15 tractors including a backhoe. I farm with 6 of them and also use the backhoe.In particular have found it impossible to keep bright hyd.oil in my 1175 Case.If I had to throw away oil from just the seven that I use regularly it would be a big bill.Have not been able to overcome the moisture problem, at least here in Texas. Also have never been able to completely drain all of the contaminated stuff.Then when changing equipment with different hyd. cylinders, also spread the bad with the good.I do as T-Bone has done and keep a backlog of used oil to settle and it does get clear in time.I happen to come from a trade where our oil was frequently run thru a centrifuge. This process removes water and all solid contaminants. If I could find an old creame separator locally ,I might attempt to take water from my oil,with it however I know that no doubt it would require some machine work to make proper ring dams to the size necessary to allow water removal.I have toyed with the idea of purchasing an used industrial centrifuge to cope with the problem and also offer a service to contractors and farmers to decontaminate oils.We must all have this problem to some extent.

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