NHTSA Recall 79V011000
Filed by Volvo Trucks North America. Component: Service Brakes, Air. Reported 1979-01-09. An estimated 100 vehicles are affected. Recall repairs are free at any authorized dealer.
Defect
THE INVOLVED VEHICLES WERE BUILT WITH CERTAIN TRACTOR PROTECTION VALVES WHICH MAY CONTAIN AN EXTRA VALVE. THIS MAY PREVENT THE TRAILER BRAKES FROM FULLY RELEASING AFTER A LOW PRESSURE APPLICATION, CAUSING THE TRAILER BRAKES TO DRAG.
What the manufacturer will do
THE DEALER WILL INSPECT FOR THE PRESENCE OF THE EXTRA CHECK VALVE. IF FOUND, THE EXTRA CHECK VALVE WILL BE REMOVED. THIS WILL BE DONE AT NO CHARGE.
Notes
VEHICLE DESCRIPTION: TRUCK TRACTOR.SYSTEM: SERVICE BRAKES; PROTECTION VALVES.CONSEQUENCES OF DEFECT: OVERALL BRAKING EFFICIENCY AND VEHICLE CONTROL MAY BEIMPAIRED. THIS COULD LEAD TO A VEHICLE ACCIDENT.NOTE: THE ONLY PRECAUTION DRIVERS MAY TAKE TO REDUCE THE RISK OF MALFUNCTIONPRIOR TO CORRECTIVE ACTION IS TO OPERATE THE VEHICLE BOBTAIL.