Kubota stopped venting front axle?

[Orange man]

My L2501 has a vent tube off the front axle. The L2502 I am buying doesn't seem to have any axle vent. Anybody know why they have removed them? Thanks

 

[North Idaho Wolfman]

My L2501 has a vent tube off the front axle. The L2502 I am buying doesn't seem to have any axle vent. Anybody know why they have removed them? Thanks

They put them on, they take them off, they put them on, they take them off, they put them on, they take them off..........
They have done that for years, with no rhyme or reason.

 

[Orange man]

It would seem like common sense to vent it. The vent is cheaper than leaking seals.

 

[GreensvilleJay]

curious... the vents they are,were ? using, do they have internal one way valves to vent air out, but prevent water getting in ?

 

[Orange man]

The standard L series had a vent hose that ran up into the engine compartment, I do not know on the other series.

 

[North Idaho Wolfman]

It would seem like common sense to vent it. The vent is cheaper than leaking seals.

There is quite a few models that do not have vents and do not leak.

 

[JohnDB]

It would seem like common sense to vent it. The vent is cheaper than leaking seals.

True example: M4500DT from late 1970's, front axle not vented, no leaks.

 

[imarobot]

The axle on my tractor is not vented and will build up pressure. I did have a leak, but that was at 800 hrs, so I'm not going to blame the lack of a vent on that.
However, I would think a vent would be a good thing to at least keep pressure from building up and maybe vent off any condensation.
The transmission has one, so I'm guessing it ain't a bad thing. Other type vehicles I own have front and rear differentials vents.
I'm thinking it may be a good thing and may tap a line into the fill plug to add a vent line. Has anyone done this, or any reason not to do this?

 

[mikester]

Less chances for critters and moisture ingress would be better IMHO. I'd personally leave it as designed.

 

[Nicksacco]

FYI, for vents such as these, I simply stick a fuel filter of the appropriate hose size on the end.
That allows the vent to vent and keeps debris out.

 

[imarobot]

FYI, for vents such as these, I simply stick a fuel filter of the appropriate hose size on the end.
That allows the vent to vent and keeps debris out.

On my side-by-side all the vents have a check valve on them to only allow pressure to vent but nothing can get in.
I would fun a vent hose heigh enough and loop back down to also keep everything out.

 

[RBsingl]

Until recently I owned a Cadillac ATS which is known for rear differential failure; failure has dual root causes: the use of ball bearing instead of roller bearings for the pinion (chosen to maximize fuel economy) and a spring loaded vent that would stick causing fluid loss and more rapid bearing damage. I removed the spring loaded vent and installed a nipple and a hose fitted with a cheap inline style diesel fuel filter designed for water separation.

The differential in my ATS was still fine when I sold it last year with 85K on it but I always checked the seals when I changed the oil and it got the initial 1,000 mile change I do for all my vehicles and another drain and change at 50K. I permanently fixed the problem last year by replacing it with a Cadillac CT5 V which has a proper heavy duty rear axle

I can't quite rap my head around these one way vent systems because they should draw a vacuum when they cool and although you don't want fluid forced through the seals having a vacuum trying to pull air (and the grit that builds up on the outside of the seals) back in isn't good either.

Rodger

 

[imarobot]

Until recently I owned a Cadillac ATS which is known for rear differential failure; failure has dual root causes: the use of ball bearing instead of roller bearings for the pinion (chosen to maximize fuel economy) and a spring loaded vent that would stick causing fluid loss and more rapid bearing damage. I removed the spring loaded vent and installed a nipple and a hose fitted with a cheap inline style diesel fuel filter designed for water separation.

The differential in my ATS was still fine when I sold it last year with 85K on it but I always checked the seals when I changed the oil and it got the initial 1,000 mile change I do for all my vehicles and another drain and change at 50K. I permanently fixed the problem last year by replacing it with a Cadillac CT5 V which has a proper heavy duty rear axle

I can't quite rap my head around these one way vent systems because they should draw a vacuum when they cool and although you don't want fluid forced through the seals having a vacuum trying to pull air (and the grit that builds up on the outside of the seals) back in isn't good either.

Rodger

Makes sense, a fuel filter as Nicksacco suggested may be a better option