United States 82V075000
PACCAR Incorporated
The problem
THE HAND VALVE INSTALLED IN THE VEHICLE MAY HAVE BEEN INCORRECTLY POSITIONED. THIS WOULD ALLOW AIR TO ESCAPE FROM BOTH THE FRONT AND REAR SERVICE SYSTEMS SIMULTANEOUSLY IF THE CONTROL LINE TO THE REAR AXLE RELAY VALVES SHOULD FAIL. PERFORMANCE OF FRONT AND REAR SERVICE BRAKES DURING FAILURE COULD BE DEGRADED.
What owners should do
THE HAND VALVE WILL BE REPOSITIONED BY THE DEALER, IF NECESSARY, AT NO CHARGE OWNER.
Units 900