Take your truck to a aircon place and get it degassed - they did it for free and doesnt take long.
This is only a guide that worked for me. I do not take any responsibility for anything that doesn't work or is unique to your vehicle.
I Installed this into a kzn130 surf but i dont see how it would be much different for anyone else
Parts required.
-Fuse and fuse holder
-Adjustable Pressure switch (or any type, i got a single phase from Airquip Services.)
-Over pressure release valve (i got a 160psi from airquip)
-Oiler (i got one off trademe)
-Water trap (i got one off trademe)
-1/4bsp thread to barb x5 I kept the high temp existing hose from the A/C and cut the cooper pipe about 40mm from the joint, flared the end and joined onto that, if you cant do that you will need a hose joiner (barb to barb)
-1/4bsp thread female couple/quick disconnect x2
- Male coupler/quick disconnect to barb x2 (all from bunnings)
-1/4bsp Gauge (got mine from an old tyre inflator, make sure it's 1/4bsp)
-12mm rocker cover breather
-Hose clamps x9 (used two in some areas that were slightly leaking)
- Length of airline. (I got 10m)
-Roll of thread tape
lets start from the intake side - connect a small piece of hose onto the air filter
Use thread tape and put on a 1/4bsp to barb on each side of the oiler take note of the direction for airflow and connect to the air filter.
Connect the other side to the intake of your A/C.
Figure out where you want the water trap in your engine bay and connect another 2 1/4bsp to barb with thread tape.
Take note of direction and cut a piece of hose to size and connect the other end of the A/C to the water trap (mine came with a regulator, make sure the psi setting is as high as it will go or you will blow lines off the fittings with a big bang)
Figure out where you want the pressure switch and connect another 1/4bsp to barb, over pressure valve, female coupler and the gauge all with thread tape.
Cut a piece of hose to suit and connect
put the fuse holder on the battery connect to pressure switch, connect pressure switch to the compressor clutch switch and check that it works.
the remaining male and female couplers are for the hose to pump up tyres and with the last male connector i filled it with silicone and put it in the female on the pressure switch to stop anything getting inside it.
Make sure you decompress the system after use as there is no check valve meaning the A/C compressor will always be under pressure.
a bit long winded and teaching how to suck eggs but is very simple and doesnt cost much
I pump 33x12.5r15 from 10psi to 38psi in 2min 20sec without a tank
Once you have it to this stage adding a tank is very simple.
Hopefully this answers any questions you may have about converting to onboard air. If anyone would like me to post more detailed pics and point out the parts i'm referring to in this guide I am more than happy to. On the other hand if you're Wellington based feel free to drop me a pm and come have a look
.Cheers
Chris
