2nd air gauge not working

[yamajason]

(04-12-2016 )in2trux Wrote:  A trick someone told me was blow some WD40 into compressor inlet to keep the unloader from sticking and clear soot from reed valve. Havent had to try it yet and shouldnt be a problem in the future since the soot monster was slain.

There is an official Cummins procedure that involves spraying WD-40 into the compressor intake. Should take less than 30 minutes and worth a shot. It worked for some other old forum members.