I have a 1992 Peterbilt 379, just bought the Truck.. I’m having 2 issues.. 1. My foot brake pedal plunge is frozen stuck.. It’s the button that sit right under the pedal.. Pedal just a free play, when I push on it it’s nothing there, no air release no nothing.. 2. I drained my air tanks, water came out first then yellow goo, then oil.. My air pressure will not build over 35 psi.. My question is which unit is causing air not to build up?.. Air compressor or being foot brake pedal plunge is frozen it’s just releasing air constantly?.. Any ideas?
