Air On Board
Air compressor & tank
- The diagrams here can be used to fabricate the steel brackets required to mount the Air On Board compressor in the engine bay, against the firewall adjacent to the ECU.
- There is also a diagram of a mounting plate which can be welded to the 4-litre reservoir, and used to mount it to the chassis inside the right-side rear bumper wing.
- These brackets are reasonably simple to fabricate if you have basic metalworking and welding skills. Otherwise, they can be made by any small engineering workshop.
Mounting the compressor and manifold:
- Mount the fabricated compressor brackets to the inner guard as shown, using 6mm metric bolts.
- You can then mount the compressor to the brackets. In order to mount the compressor horizontally as shown in the picture, you'll need to remove the standard mounting brackets from the compressor and rotate them 90º before reassembling the compressor.
Mounting the air reservoir:
- Mount (weld) the air reservoir to the flat mounting bracket shown above in the 'fabricate brackets' section.
- Attach the required air fittings (depending on your requirements) to the available ports on the air reservoir. I recommend installing a safety valve/drain valve on the fitting at the bottom of the reservoir in order to drain water from the tank.
- Bolt the reservoir/bracket assembly to the three captive nuts in the right (driver's) side chassis rail using M8 bolts.
Wiring and connecting airlines and fittings:
- The compressor can be wired using the included wiring loom and instructions. I suggest wiring through an accessory fusebox rather than direct to the battery.
- Running the wiring through the firewall to the switch is best accomplished by going through the blank nippled provided in the Toyota grommets.
- The rocker switch supplied as part of the kit almost fits into the standard Toyota blank switch plates adjacent to the steering wheel, with some minor expansion of the rectangular holes required.
- When installing fittings into the tank and reservoir, I recommend using a sealant rather than thread tape, to reduce the chance of tape fragments making their way into air tools etc.
- When running wiring and airlines down the chassis, ensure they are well secured using cable ties to prevent damage to themselves or other components. It's also good practise to run wiring inside some split tubing to offer additional protection.