United States 98V041000
Ford Motor Company
The problem
VEHICLE DESCRIPTION: MEDIUM DUTY TRUCKS AND CHASSIS-CABS. AN AUTOMATIC LOCKING FRONT WHEEL BEARING ADJUSTING NUT WAS DAMAGED DURING INSTALLATION OR REMOVAL BY INCORRECT TOOLS OR AN INCORRECT TORQUE SPECIFICATION WAS USED.
Risk
THIS CONDITION CAN CAUSE THE NUT TO ROTATE FREELY AND LOSE TORQUE. IT COULD ROTATE UNTIL IT IS NO LONGER CONNECTED TO THE FRONT SPINDLE AND ALLOW THE FRONT WHEEL TO SEPARATE FROM THE VEHICLE.
What owners should do
DEALERS WILL REPLACE THE FRONT WHEEL BEARING ADJUSTING NUTS WITH CASTLE NUTS AND COTTER PINS.
Units 1600