Blue Tongue Compressor

Gday Pete,,, I have a Blue tongue compressor and just had a look at it. Mine is mounted on its side in a small tool box so cant see the letters but the inlet with the little filter is the one facing towards the electric motor.... Nav.

Easy

Fire it up and see which one sucks and which one blows.

However I have a Blue tongue IV and on looking on top of it

The A port is the inlet/sucker and the arrow head denotes that.

Straight acroos the other side the O port is the outlet/blower and the arrow head denotes that.

Mine is mounted in the cabin between the pasengers seat and door.

It is an emergency back up to the endless air and ARB under the bonnet.

And yes I have had to use it once in that capacity due to switches falling apart on the ARB.

Just something to ponder over, I've had a blue tongue for about 10 years & being in the hydraulics industry I use it as a vacuum pump. ie to pull vacuum on oil tanks to work on components without emptying tank & to assemble large or difficult cylinders. It has worked without mishap except one failure of a reed valve.
It now lives in my service truck.

They are a great unit, here's a pic of mine and my mates installations.

!MPG:13!