SERVICE BRAKES, AIR
VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH OPTIONAL WABCO AIR DRYER. THE AIR BRAKE SYSTEM WAS PLUMBED SO THAT THE SYSTEMS DID NOT PROVIDE AIR RESERVOIR ISOLATION. THIS DOES NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 121, "AIR BRAKE SYSTEMS."
Remedy: DEALERS WILL REPAIR THE AIR LINE PLUMBING TO INSTALL A CHECK VALVE.
1,687 vehicles affected
SERVICE BRAKES, AIR:SUPPLY:LOW PRESSURE WARNING:SWITCH
THE AIR BRAKE SYSTEM WAS MANUFACTURED HAVING AIR BRAKE PRESSURE RELEASE TIMES OF APPROXIMATELY 1.5 SECONDS. THIS DOES NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 121, "AIR BRAKE SYSTEMS."
Remedy: DEALERS WILL INSTALL A QUICK RELEASE VALVE IN THE AIR PRESSURE RELEASE SYSTEMS.
500 vehicles affected