Ok I will try that and see if it fixes it I appreciate your help
Yes it's only escaping through the front of the yellow parking valve on the outside of the dash only when the brakes are released
It has two knobs on the dash yellow and red then it has a separate trailer brake handle above the steering wheel
[ATTACH]
Ok thank you I appreciate the help guys
I thought the same Thing but the one that's in it is new
hello I just purchased my first peterbilt yesterday it is a 1986 359 Pete dump truck When I was traveling home yesterday all of the sudden air...
