old motor oil = hydraulic fluid

Interesting.

I remember reading a couple of years ago, that someone purchased a cheapie Chinese "crate tractor", (needing final assembly) where the hydraulic system was filled with motor oil.

They thought (so did I at the time), that maybe they incorrectly filled it with the wrong fluid, but did not have a decent service manual, to compare what fluid was required.

Apparently, they use motor oil too.

I have NO knowledge of this.

SO, if I had to use something, I would rather use ATF fluid that was used instead of motor oil.

There, worth every nickle.

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My Russian tractors use 40W motor oil for the hyd. system. Neighbor has a 70 year old tractor with a loader. Uses used engine oil in the hyd. Has for 40 years at least. Does it because the cylinders leak.

The big oar hauling freighters use a lot of hyd oil. At one time, you could get all the barrels of used hyd you wanted. Looked as clean as when it was new. Not sure where it goes now.

I have a 50+ year Case 420B back hoe. The maintance manual lists different oils by the page. I was going broke getting things right. I talked to a case Mech and he said to use hydrolic in everything but he power steering and I would be fine. Haven't had a prob.....except in the power steering unit.

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