That is a mitigation for the problem though rather than addressing it.
Unfortunately Ken, the problem is ARB’s design does not work super well with how the newer internal structure of Toyota 3rds and clamshells.
That’s from an air locker engineer at ARB and from East Coast Gear Supply. You can replace all the seals you want, but it will, again, pump up the air lines.
It’s the fact that the seal housing air port sits in oil, not above it. Even with a perfect seal, when you blow off the pressure, a tiny bit of oil will move into the line.
Found this answer in the 80's section
This would be easier than using the purge valve
That is for the older 2 number RD lockers. You have a newer three number RD locker that uses the square o rings.
To get to those o rings, you have to pull the 3rd and clamshell. It will temporarily fix them, as you’ll clear the air lines of oil. But the oil will come back, it’s just how it works. The more you use an air locker in the 200s diffs, the more oil will move up the line. I use my front and rear air lockers every time I go off road, which is almost every time I drive it. So I push the oil around pretty regularly than others.
ARB knows it, they just don’t want to acknowledge it so publicly. That all said air lockers are still the only locker I’d spend money on.
I’m not trying to discourage you, I’m just trying to save you from wasting time and money. Like I said, new square o rings are fine and all, there are more deeper in the assembly. But the best way to find out the issue is to test.
The important part
So I would say this Ken. Test how long your front and rear lockers stay engaged/how many minutes between compressor cycles?
If you can lock up, and you don’t hear your compress go off for say, 10 minutes. You don’t have an o ring issue. You can also do a pressure test with a gauge, if you have access to one.
My front/rear last for 75 minutes between compressor cycles as a comparison.
Replace your factory breather. They are $10 and it’s just popped on the top of a rubber hose.
If your breather is new, and your compressor doesn’t cycle for 10 minutes. It’s simple the design of the two companies not playing nice together. That’s why ARB made the purge valve, they know it needed it, it just doesn’t sound good from a marketing stand point.
