Air pressure gauges not indicating evenly

[Rawze]

(10-15-2018 )09pornstar Wrote:  My prostar started developing another beautiful sympthom.
When i press the brake pedal only #1 gauge goes down, the other stays at 120 the whole time. When i get off the highway it slowly goes to 90 just from one pump. No audible air leaks whatsoever on tractor or trailer.
Im bringing the truck in this weekend to get the camshafts replaced but i would like to know what to expect and maybe order parts. Thanks!

Air brake inspection...
https://youtu.be/rMZwffPGAiQ

Every person that holds a CDL license is required to do this inspection regularly to their trucks,... yet I rarely ever see anyone bothering to do so. -- If a person has just purchased that used truck, or is test driving it to see what may be wrong with it, -- TEST EVERYTHING AND THE BRAKES TOO. Do an air-brake test on it and make sure it passes. Truck-school 101 style. -- BEFORE PUTTING IT ONTO THE ROADWAYS~!!.

This is just a reminder to everyone out there -- INSPECT YOUR EQUIPMENT, MAKE SURE IT WILL PASS ALL DOT INSPECTIONS, AND KEEP YOURSELF AND THE REST OF THE MOTORING PUBLIC SAFE!> SOMEONE'S LIFE DEPENDS ON IT!>

The last thing anyone wants to face is huge fines or god forbid, someone else getting severely injured or killed because you drank coffee that day on that 15-minute pre-trip instead of actually checking your truck out or bothering to do that cdl-required air-brake inspection on regular occasion.