ARB locker seal failure? Compressor runs and oil comes out of Diff breather

[Dharma Dude]

I just noticed that my front ARB front locker is not working anymore. When I activate the compressor, it just keeps running, and oil is coming out of the differential breather tube. I think this means the internal air piston inside the differential has lost its seal. Anybody know if it could be something else?

The rear locker works fine. The compressor pumps and then stops after a second or two.

 

[GXO]

It's the internal seal in the locker.

 

[KLF]

It can either be the big O-ring inside the locker, or the collar on the outside that transitions the copper air line to the locker. There is an O-ring in there that gets a lot of action, the shaft is always spinning in this collar when you drive. Either way, the diff has to come out.

 

[equalme]

Either seal or copper air line. I had same issue in my rear locker and somehow my copper line shifted and got chewed up in the gears.