M939A1, Radiator Fluid in the Air Compressor Uploader Valve

[bsteinborn]

The truck hasn't been building any air pressure so I checked the uploader valve and inside it was full of radiator fluid. I'm guessing the air compressor is cracked and must be replaced? I REALLY don't want to replace it, it doesn't look easy. This also explains why the wet tank has been spitting green liquid lately? Anyone have any idea how bad my air lines are going to be? Are the lines full of radiator fluid? Thanks.

 

[Crf450x]

My first guess would be the head gasket or the gasket on top of the head (I don’t know the proper term). Super easy to take it apart. If you decide to try that, haldex 3559545K has everything you need. $44 on eBay. Maybe cheaper elsewhere, I don’t know.

I’d fix the compressor then just drain the air tanks a few times to blow the antifreeze out. I doubt it will cause any problems.