04’ cm870 air compressor keeps breaking

[SquareOne]

Good spray bottle with a little Dawn dish soap/water will work wonders. Build the pressure up, shut the truck off and start spraying. You will be amazed at how much you will find when you really look for the slightest leaks.

- As a side note, Just because the purge is constantly popping, doesn't necessarily mean you have a large leak. All it takes is one of the command lines on the governor to have the slightest leak and it will continuously shift the spool thus commanding the compressor to build rather than bypass. You will see very little (if any) actual loss on your air gauge since the leak will be so small.

Maybe time the interval between the air purging. If it's very short and consistent (as in 2.5-3min or less) then the above described issue may be your culprit.

I've fairly often heard guys at the truck stops who constantly pop the air just while filling up---- I have no idea how they have a compressor left.