ARB compressor leaking oil
I have an '02 7.3L with ARB's front and rear air lockers. The compressor sits under the passenger seat and the solenoid tied to the rear diff air line is leaking oil...enough that it is soaking the carpet now. I had not noticed this,, or smelled it, until I picked the van up from an alarm installer who had mistakenly engaged the lockers.
The van is fairly new to me, as is ARB's system, so I'm trying to sort out the cause and how serious it is. In reading some other forums, it could be as serious as a bad o-ring in the diff housing. Or, it could be somewhat normal in that there is no breather valve installed, or at least best I can see in tracking the lines.
Can anyone help in suggesting a few steps I could go through to determine cause and risk of damage? Thx