NHTSA Recall 77V096000
Filed by Mack Trucks, Inc.. Component: Wheels. Reported 1977-06-17. An estimated 825 vehicles are affected. Recall repairs are free at any authorized dealer.
Defect
THE FRONT WHEEL RIM CLAMP STUDS, INSTALLED ON THE INVOLVED VEHICLES, MAY NOT HAVE BEEN MANUFACTURED CORRECTLY, CAUSING A BRITTLE CONDITION IN THE THREAD ROOT AREA. THE STUDS COULD EVENTUALLY CRACK AND BREAK WHEN WHEEL NUTS ARE TIGHTENED TO SPECIFICATIONS.
What the manufacturer will do
THE DEALER WILL REPLACE ALL SUSPECT FRONT WHEEL STUDS, WITHOUT CHARGE TO OWNER.
Notes
VEHICLE DESCRIPTION: HEAVY TRUCKS.SYSTEM: WHEELS; STUDS.CONSEQUENCES OF DEFECT: WHEEL STUD FAILURE COULD CAUSE A LOOSENED TIRE ASSEMBLYAND IMPAIRED VEHICLE CONTROL. FAILURE OF MORE THAN ONE STUD COULD CAUSESEPARATION OF THE TIRE AND RIM ASSEMBLY, CAUSING LOSS OF VEHICLE CONTROL AND ANACCIDENT.NOTE: DRIVER MAY BE ALERTED TO THE CONDITION BY A WOBBLE OR VIBRATION IN THEAFFECTED WHEEL.