A FITTING MODIFICATION

How to clock the air output fitting of an ARB Maximum Performance on-board air compressor

- Christian Hazel

This ARB air compressor can fit in a huge variety of mounting locations. The box and manual call it “ARB Maximum Performance On-Board Air Supply.” ARB’s website calls it “ARB Maximum Output On-Board Compressor.” And most offroaders simply call it in our own vernacular, “ARB twin air compressor.” But whatever you call it, ARB’s CKMTA12 compressor is a super-fast, super-powerful, ultra-reliable way of adding onboard air to your vehicle to quickly air up tires, operate air lockers, and even run some pneumatic tools.

While we’ve installed this compressor in many of our project vehicles over the years, most recently in a new Wrangler JL, one thing we haven’t addressed is a question some have regarding how to clock the output to route the air line away from components that may interfere in some mounting locations. So, when we decided to add a steady, never-ending source of onboard air to the 2017 Ultimate Adventure vehicle, the UACJ6D, an ARB Maximum Performance on-board air compressor got the nod to augment the 15-pound Power Tank that’s always on the rollcage.

1.The compressor comes with a full plug-and-play wiring harness that allows you to hook it up with ARB’s Air Lockers if you’re running them and switches if you’re not. Or you can do like we did and just hook it to an existing power distribution center like the Painless control panel we have in the UACJ6D.