Bush Hog gear box

TBA · May 29, 2018

It is amazing how water gets in Bush hog gear boxes on a bat wing. It has mushroom type vents, but the splitter gearbox with a cover does not get water in it. So it must get in threw the vent, not a lot just enough to turn oil milky. No real way to drain except with suction gun without getting it all, water on the bottom is the worse place for it to be.

Dean · May 29, 2018

Condensation.

Same way water gets into tractor transmission/rear axle/hydraulic sumps.

This is why manufacturers recommend such sumps be changed periodically.

Dean

Steve@Advance · May 29, 2018

Something you might try, remove the vent plug, put in a poly push type fitting, run a small line to a protected area, secure it point down so water can't go in. Then add one of these to the end to keep insects and dirt out.
Pneumatic Exhaust Filter

Texasmark1 · May 30, 2018

Unless an oil sump is hermetically, sealed, the higher the differential temperature and humidity, the more the opportunity for water entrapment possibility....

Don't know the technical term, but on ingestion, as the box cools, it brings in the moisture as air + water at some percentage. When the box warms up, internal air expands, and vents, a lot of the air will vent before you get to the boiling point of the water.....a temp high enough to cause the water to vaporize and exit with the air.

Solution is to drain periodically, or run hard for a time to get rid of it. On not venting, and worn seal on a closed box, below the level of the oil usually will leak oil. So you're zapped regardless of which way you go.

My opinion.

Bush Hog gear box

TBA

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Dean

Well-known Member

Steve@Advance

Well-known Member

Texasmark1

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