ARB ON-BOARD HIGH PERFORMANCE 12 VOLT AIR COMPRESSOR (CKMA12)

Finally, I had some time to finish this project.  I have chosen ARB CKMA12 High-Output Air Compressor model for my on-board air compressor. Unit comes with full wiring harness, mounting hardware, pressure limit switch and detailed instructions.

Although this model is compact and highly configurable, it was still a challenge to find a spot to mount it under the hood of the Ram 3500. I found just big enough space behind the driver side headlight. Here is step by step instructions;

1. Remove these two bolts

ARB Onboard Air Install Step 1


2. Pull the plastic cap in the wheel house to reach and remove the 3rd bolt.

ARB Onboard Air Install Step 2


3.  With a soft tissue wrapped flat tool give a little nudge to pop the headlight out.

ARB Onboard Air Install Step 3


4.  Remove the harnesses going into the headlight.

ARB Onboard Air Install Step 4


This is the bar where I am going to mount the compressor. To give myself more room to work, especially for drilling, I decided to remove the windshield washer reservoir and the big air hose.

ARB Onboard Air Install Step 5


5.  This is first of 2 bolts that hold the reservoir.

ARB Onboard Air Install Step 6


6.  This is the second bolt. After detaching the sensor cables, just lift the reservoir and lay it down to the left.

ARB Onboard Air Install Step 7


7.  Loosen the clamps on both end of the hose and remove it out of the way.

ARB Onboard Air Install Step 8


8.  Use the metal base plate that comes with ARB Compressor as a guide to drill the holes.

ARB Onboard Air Install Step 9


9.  Prep the compressor. I am using ⅛ male to ¼ compression adaptororange teflon tape and 150 psi rated air tubing.  Rotate the manifold to create best angle so the hose is not bent.

ARB Onboard Air Install Step 10


10.  Attach the air filter and the pressure sensor. Use generous amount of orange teflon tape.

ARB Onboard Air Compressor Install


The bar I am going to mount the compressor is 2” thick. I am using 2.5” bolts, self locking nuts, locking washers and plastic washers. I have primed and painted the base plate black to prevent corrosion.

ARB Onboard Air Install Step 11


11. After removing the 4 bolts that holds the compressor (yellow arrows), I mounted the base plate and mounting bracket to the bar. I used plastic washers to dampen the vibration and the noise.

ARB Onboard Air Install Step 12


12.  Attach the compressor body to the mounting bracket.

ARB Onboard Air Install Step 13


13.  Attach the ARB cable harness to the compressor.  I used 1/2 inch split loom to protect the cables.

ARB Onboard Air Install Step 14



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