Tim,
Just got a new camera, so here's some pictures of my OBA.......
<img src="http://not-allowed.com/d4tev" width="450" height="338"/>
My home made York adjustable mounting plate based on the kilby design.
Two years after fitting the OBA I still haven't got around to painting it or fitting the inlet filter.
On the outlet you have a fitting that goes from NPT to BSP thread, followed by a inline one way check valve, which in turn goes to.....
<img src="http://not-allowed.com/dwjed" width="450" height="338"/>
A four inline manifold, the inlet from the York comes in on the right. Then from left to right you have, a 1/4 quick release female connector, the
outlet to the ARB regulator on the far left, a pressure relief valve (PRV) set
at 10% above the working pressure of 120 psi and finally a pressure gauge.
The outlet on the left hand side of the manifold goes to the pressure differential switch and air tank.
<img src="http://not-allowed.com/8cg5z" width="450" height="338"/>
The differential pressure switch (the black box with a knob!) is set to engage the York compressor clutch at 100 psi and switch off at 120 psi maintaining a minimum of 100 psi reserve to supply the ARB reg set at 90 psi. You can see the ARB reg and pressure gauge in the right of the photo.
The next photo shows the ARB manifold....
<img src="http://not-allowed.com/7bdza" width="450" height="338"/>
ARB manifold running at 90 psi, showing blue airlines running to front and
rear ARB's. The inlet for the manifold comes in at the bottom via the 90
psi reg (see above).
<img src="http://not-allowed.com/84oda" width="450" height="338"/>
and finally the air tank, cant remember the capacity but I bought it brand new from a truck parts supplier for about £20. A fraction of the price you
would pay for one from a jeep supplier etc. The tank has 3 inlets, one at the bottom used as the water drain, one in the centre on the half way line which is connected to the main manifold and one on the end of the tank which is plugged. The tank fits perfectly in-between the two rear shocks directly above the rear axle.
You have to re route your exhaust but I run a home made 3" straight through system.
<img src="http://not-allowed.com/8gjzu" width="450" height="338"/>
and this picture gives a general over view of the system.
I haven't used a oil filter in my system because the York has been modified to stop it throwing the oil out.
Any questions, just ask away.
Sam