Thread: ARB air locker issue

Went off road last weekend and had an issue with my rear ARB diff locker, which I thought some of you might be interested in. When I engaged the locker on the flat (ie unloaded) or when going down hill, the air compressor and locker operated as they should. However, when going uphill, air compressor ran continuously. A couple of my companions said they'd had the problem before and suggested the it was cause by an O-ring which seals the air line in the diff. When going uphill, the internals rotate a little and pinch the O ring allowing the leak. When going downhill the internals rotate the other way and don't pinch the O-ring. Have booked in with ARB to fix (earliest available 3 weeks away!) and expect (hope?) it will be done under warranty.

Originally Posted by Mundy

If the breather pipe spud (whatever that is!) is blocked, will it lead to a leaking pinion shaft oil seal, which has just started leaking. The coincidence seems remarkable.

The "spud" is the fitting screwed into the top of the axle housing that the plastic pipe (breather) is attached to, can be a vertical or horizontal fitting, usually horizontal, one of the symptoms of blocked breather is leaking pinion seal, another is diff oil being exhausted out of ARB solenoid on compressor, regards Frank.