Ice in hydraulics

[mongobird]

mongobird
Be sure to check that hyd reservoir breather cap(parts key #32) is not plugged. There was an option of a hyd oil heater kit.

Years ago I had some bug mud up the breather cap, so it is now on my list when I grease, etc.

That heater is an option I was unaware of. I have seen similar heaters for about $100, and perhaps I should consider when I fix the differential lock this summer / fall. Most of the ones I've seen are about 200W which should really get things toasty.

I should emphasize that this problem has been brewing for many years, and has finally gotten to an annoyance and an impediment to getting things done. My shifter boots are in very good condition, and have a cover on top of them. While the unit lives outdoors, it is generally protected from the weather a bit.

My working theory is that water makes it into the system through the loader pistons, because the symptoms always increase after loader usage in snow or wet conditions. So I am looking for a more permanent solution, and a installed heater might be the best approach.

Meanwhile I am looking for a magnetic heater so that I can check it out.

Thanks, everyone for the stream of ideas.

 

[Soundguy]

if water ws making it in thru the loader pistons.. they would be leaking sooooo bad you couldn't use the machine.

even the external wipes should be stripping water.

my guess is the laoder is the only thing using any real hyd flow. you use the laoder.. oil heats.. pushes warm expanding air out of the sump via the breather. then as the unit cools, cooler air enters the sump via the breather... dew point is passed.. water condenses on the hygroscopi inner surface of the sump and then collects at the low point of the resevoir.

 

[sandman2234]

if water ws making it in thru the loader pistons.. they would be leaking sooooo bad you couldn't use the machine.

even the external wipes should be stripping water.

my guess is the loader is the only thing using any real hydaulic flow. you use the loader.. oil heats.. pushes warm expanding air out of the sump via the breather. then as the unit cools, cooler air enters the sump via the breather... dew point is passed.. water condenses on the hygroscopic inner surface of the sump and then collects at the low point of the reservoir.

Yeah, what he said!!!! Even if you aren't using the tractor, if the temperature goes above and below the dew point, your going to get water in the fluid. Might also want to take a look at your motor oil, by draining the sump from the bottom, as it most likely has the same problem, just hopefully not as bad because you probably have changed out the oil a time or two since the 15 year hydraulic change.
David from jax

 

[mongobird]

The motor oil doesn't have any substantial signs of water in it. The engine gets heated up frequently, and the oil is changed several times a year. For grins, I took a quick sample today when the temps were 40F (now down to -4F). So sign of visible moisture. Quick drains are great things.

Caught up with a friend who farms in northern Canada. It was cold there tonight...-30C.

He said that what I was describing happens all the time there, and that heaters work much better than oil changes, although I could do a change, if I heated everything up first. He also said that if I got a parking lot contract, and worked the tractor straight for five days my problems would go away for a while.

The recommendation he has is for epoxy on heaters (or magnetic if I want to play with placement. The suggestion is a heater at the sump area, and a heater at the top, and removing the (large opening) dipstick. The heater at the top will reduce the condensate at the top of the area containing hydraulic fluid, and help venting of vapor.

He does not like case penetrating heaters, because they tend to burn oil, and keep it too hot. Also, they tend to not heat the sump, hence the preference for heaters which attach to the cast housings, and distribute the heat more evenly.

In his experience, changing the oil only gets it frozen up again in a couple of weeks. He also points out that he has several tractors notorious for this problem, such as a two wheel drive Case.

He also pointed out that on a tractor with wet brakes, some of the brake material in the fluid tends to attract ice crystals, aggravating the filter clogging on cold systems.

I hope this helps the next guy.

 

[Soundguy]

that's why a lil transtune inthe hyd oil is a GOOD thing.

 

[Fishman1227]

I have a 1710 Ford and I am on my third oil change trying to get all the water out of my fluid.. First time it was so milky it looked like milk!! I'm thinking it will take at lease another time or two..

 

[J_J]

Did you use the mixture I mentioned in post #2?

 

[Fishman1227]

Yes I did!! Its almost gone, but still has a bit in it!! I'm thinking of putting some of this in next time..
trans tune
What do you think??

 

[J_J]

I concur with Soundguy in post #15

 

[Fishman1227]

I'm going to put it in next time!!