Too Much air pressure!

I mean i could be wrong but at 180psi, i would think you might be blowing things apart already.


Have you checked your gauges for accuracy? They may not be reading correctly.

 

High pressure blowout valve would be pushing out air at whatever its relief pressure is set to, pretty sure the normal pressure for that is 150, but he might have one at 180

 

Check with an external gauge.

 

Govenor signal line blockage?

Possibly ice depending on location..

 

I would guess the unloader is all carboned up. They sell kits to rebuild the top end of compressors.

 

Mine kept pumping one day, although as stated the tank high pressure blow off valve triggered at about 155 psi.
It was a moisture problem that froze the governor.
Turned out to be a bad air dryer in my case that was a cause of the problem.

 

Key word Aftermarket parts .. aka junk more often than not as far as truck air parts go ..

 

Mine did this first hand, would over build air when it was cold, once it cycle a couple of times, it be working normal. At the end, it was the unloader valve on top of the compressor as @Hammer166 mentioned. Simple fix. Buy the kit and make sure you install the springs correctly.

 

I'm betting that the gauge is bad...