Locker and Compressor

Yup- definately a leak somewhere.
With our front locker engaged there is no leak- but when the rear is engaged the compressor activates. There is a small O ring in the diff. activation 'piston' that is the problem with mine. If yours is just fitted, maybe a hose connection?? With the compressor running and switch activated- spray a bit of soapy water around all the hose connections...

Leak, guaranteed. I have same setup with small compressor and it holding both locks for more the 30 min – no problem. Apart of obvious as not tighten enough treads, mostly common leaks occurs inside diff itself. Test very simple. Connect line from diff to good (and here I mean really good) pressure gauge with valve and to compressor; pump system until it locks and close valve separate lock-line-gauge subsystem. It should stay locked virtually forever.

Cheers
Serg

Blaze
If the leak is an external air line the old soapy water trick on the connections works well. If the leak is inside the diff housing there will be air coming out of the diff breather. Once again soapy water

Cheers ob

Thanks guys, Only problem here is you have comfirmed what I already thought it was...... I was secretly hoping that it was normal LOL

Blaze,
As others have said, try the soapy water trick. Note too that the ends of the plastic hose MUST BE 100% square at the end where it pushes into the fitting/s.
My rig has air lines all over the place (about 6 "T" pieces, the air locker solenoid, 2 solenoids on the air horns, a water trap, 2 air tanks and 3 Ryco snap fittings). Trying to find a small leak is a pain in the @RSE........
Recently I nearly tore my hair out and finally found that my 8 year old front locker's solenoid was faulty. It was not shutting off the air supply when in the disengaged state and that was making my steering unbearably difficult if I had the front hubs locked, even though the truck was in 2 wheel drive. New solenoid off ebay soon fixed that.....
Cheers,

Roachie (as you can see the lappy is okay, thanks for your advice)

I have the old model compressor that I have vehicle mounted and fitted the pressure switch to. All fittings have thread tape and I can find no obvious leak, but after 5 minutes it does a short run to re-pressurise. I suspect it is the way the tank is sealed.

The tank is so small that it only has to loose a little bit air to drop the pressure a significant amount.