Posted by mark on January 11, 2009 at 17:36:42 from (172.164.251.77):
In Reply to: Drying hydraulic oil posted by Bret4207 on January 11, 2009 at 16:21:26:
Bret,
I have seen Hydraulic fluid be mud brown from water in it, with no apparent ill effects to the system. Not that I think it's OK....just an observation.
Many old tractors sit outside and rain will get past the shifter boots and down into the sump...that's where most of the water contamination comes from. If condensation was the culprit..we'd all have problems. Therefore I don't think condensation is your major culprit.
Does the fluid still look like it did when you installed it? Oil and water MOSTLY does not mix. If there is a lot of moisture present..it will turn milky when churned up by the pump/gears.
IF it were me.....and I had minute moisture accumulating in the valves and freezing them....I'd add some dry-gas (methyl alcohol) and see if that takes care of it. The alcohol absorbs the water and then it evaporates.
Like one person suggested, the water sinks to the bottom. One day before starting your tractor, crack the hydraulic reservoir drain and see if water runs out. If it does, let it run until oil begins to come. If it's just a half cup or so...then add some dry gas and see what happens.
You're going to have to get the water/moisture out of the valves regardless.
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