United States 78V146000
FREIGHTLINER LLC
The problem
THE CHECK VALVE, LOCATED ON THE INLET SIDE OF THE PRIMARY AND SECONDARY AIR TANKS MAY CRACK IN THE FEMALE FITTING AREA AND CAUSE A SLOW LOSS OF AIR. A LEAKING VALVE WILL REDUCE AIR PRESSURE AND PARTIAL OR COMPLETE LOSS OF BRAKES ON THOSE AXLES THAT DEPEND UPON THAT PART OF THE SYSTEM COULD OCCUR.
What owners should do
THE DEALER WILL INSPECT AND, IF NECESSARY, INSTALL NEW AIR CHECK VALVES.
Units 65