CKMA12 High Output 12V Air Compressor System Single Motor Replacement for Tire Inflating and Air Locker Differentials

Good quality, Arb clone

Finally got around to installing this compressor (of course outside the window of return). Either it came cracked or it cracked installing the T-piece. Not sure what to do at this point, but this is frustrating.

Looks great, works great.

Easy to mount. Wiring is all there. No instructions but can be found on line on ARB's site. Surprisingly quiet.

Well it worked for about 4 weeks , and now it might turn on once in while. It seems to fill the 1.5 gal. Tank 1 time . And then it shuts off and won't come back on. I think it's getting to hot and then turning itself off.

Like same to the original ARB and very good quality.

No wiring diagram and no instructions on use

This is a solid little compressor. It’s obviously a knock off of the ARB CMA12 High Output compressor- they even have the same name. There is no ARB branding on this compressor but I suspect they would look identical otherwise. It’s impressively heavy and seems well built. It includes a heavy duty wiring harness with a compressor on switch and connections for two air locker switches (front and rear most commonly) and connections for the matching solenoids at the compressor side. It also includes a heavy duty 60amp relay and automatic pressure switch. It has a mounting base but you’ll need to get creative with finding a way to secure it since the bolts are directly underneath it. It took me a while to figure out how to secure it. I tested it with my MORRFlate 4 tire inflator/deflator system on my 35” BFGs. Airing up all 4 tires as once from 25-35psi took this compressor about 4-5 minutes. I admittedly wasn’t timing it so that’s a best guess but it did raise all 4 tires about 2psi a minute. It’s loud but not terrible, from inside the truck with the HVAC and radio on you can nearly hear it- I mounted mine under the hood. I recommend that because holy smokes this thing gets HOT, see attached pic. At one point the manifold registered 244*F after a solid 4 min of continuous inflating all 4 tires. Moving forward I will cycle it on and off a bit more when airing up.

The compressor I received did not function. I tried connecting it with the supplied harness and when that didn’t work I tried supplying 12v directly to the compressor leads. It will not work. I tried getting a replacement but was told I could only get a refund. I will buy the real brand name next time.

Missing parts … no air filter, pressure switch, toggle switch , mounting plate and hardware