Kubota Front Axle Vent

oosik · Mar 28, 2020

Here is a picture of the vent hose and U-shaped terminal pipe on my Kubota M6040. View attachment 647959

PsRumors · Mar 28, 2020

I'll look again

Egon · Mar 28, 2020

Some are not vented. Keeps a positive pressure and does not allow water In.

ericm979 · Mar 28, 2020

If you do add a vent, put it in the center of the axle, not on one end. Unless you operate on flat land only. My Branson has a factory vent on one end and it leaks if I park the tractor on a side slope with that side on the downhill. The dealer sent me an extension which helps some but does not fix it.

greenrider1 · Mar 29, 2020

I went back out to the barn this morning and took the side panels off the L5740 to get a better look. I spent a good bit of time looking things over and I couldn't find any vent lines connected to the axle. It's strange that Kubota feels the need to vent some models but not others. I dont spend much time doing deep water crossings so I would imagine the benefit of having the axle vented would outweigh the possibility of water intrusion. I still plan on tapping the fill plug, adding a 90 degree barb and running a vent line along the top of the axle to a termination point up under the hood. The top of the axle is pretty well protected. Any gear oil that happened to leak into the line on a slope would be able to drain back into the axle.

PsRumors · Mar 30, 2020

greenrider1 said:
I went back out to the barn this morning and took the side panels off the L5740 to get a better look. I spent a good bit of time looking things over and I couldn't find any vent lines connected to the axle. It's strange that Kubota feels the need to vent some models but not others. I dont spend much time doing deep water crossings so I would imagine the benefit of having the axle vented would outweigh the possibility of water intrusion. I still plan on tapping the fill plug, adding a 90 degree barb and running a vent line along the top of the axle to a termination point up under the hood. The top of the axle is pretty well protected. Any gear oil that happened to leak into the line on a slope would be able to drain back into the axle.

I have looked all over my L45 axles and cannot find a hose coming off of it. I will probably add a vent as well

Paystar · Mar 31, 2020

My B does not have a front axle vent. A Kubota rep at a dealer show I attended told me it is like this and is supposed to have some pressure to keep contaminates out.

We only got into the conversation because I was asking him about all the forum people that think this will cause an oil leak past the seal and they go and make some kind of homemade vent.

sixdogs · Apr 1, 2020

They're vented. My M7040 has a vent that exits behind the battery in front of the radiator. I overfilled my front axle and it blew oil all over the front battery tray and radiator.