International LT air leak

I had an air leak in the left front drive axle brake chamber on mine. Didn't notice it on the push pedal test. It's hard to detect at a truck stop pre trip with all the noise, but the interstate 81 NB weigh station guy in Virginia noticed it, marked it as a violation not a citation, no OOS just told me to get it fixed within 15 days.

 

Mine does the same thing, I finally narrowed it down the the cab air bags on the sleeper. It’s on my to do list after the first of the year.

 

Check the "T" fitting inder the cab that controls the dump valve... unless your under the cab and feel for air you can't hear it even with the truck off

 

There’s no Internationals with paccar engines, but sounds like you need a spray bottle with some soap and water and start spraying every fitting you can find.