How do you remove water from hydraulic oil?
I just changed the hydraulic oil in my tractor. As I was finishing, it started to rain. A little water got in the oil, and now it's cloudy. Because it's a sealed unit, the water won't evaporate when it gets warmer. Is there an easy way to remove the water without changing all of the already-new hydraulic oil?
I have used the 'baby diaper crystal' type of elements that are intended to remove small amounts of water. They work well IF:
-the flow is very low, say 1/10 of the normal element rating. The material absorbs water but depends on time in contact with the water to take it out and hold it. And apparently high velocity flows either strip the water back out or prevent it from absorbing in the first place. Just putting a water element in place of a return filter is somewhat helpful but not great.
-They re not really intended as particle cleanup.
-Water and dirt retention is small amounts. Ounces of water, not gallons. for larger systems, peter's centrifuge sounds probably better.
-They don't remove 40 gallons of antifreeze, or battery acid, or engine waste oil, or any number of other materials that hav eended up in our tanks.
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