How many miles on the rig? In my opinion the Hitachi compressor is pretty darn reliable, dare i say even more than the AMK. It definitely lasts about 10 years or more. What brings any of the two pumps down is leaky air struts, defective valve blocks, and leaking air tank reservoir. Those things will make the pump work more often than needed. Converting from the Hitachi to the AMK is not a huge deal, but its more work for no reason in my opinion. You need a different air compressor bracket/mount for the AMK compressor, and you need to alter the suspension software so that the truck can recognize the AMK compressor. So make sure your air struts and valve blocks aren’t leaking. You can test that easily. Also take note of the mileage on the truck. The more mileage, the more “moisture” the pump has seen. Inside of the pump has water drying material packed in its canister. Once that material has absorbed all the moisture it can, that alone will bring a pump down, but that’s something that can be changed cheaply and easily on the same old pump.