Reported Aug 3, 1977207 vehicles affectedPACCAR, INCORPORATED
The defect
The involved vehicles have 10 degree wedges in the parking brake system, which may not be adequate to hold a loaded vehicle on a steep grade. This deficiency may lead to failure of the parking brakes.
The remedy
Dealer will replace the 10 degree wedge with a 12 degree wedge to reduce the chances of parking brake failure.
Vehicle description: trucks equipped with rockwell rda stop master II wedgebrakes.system: parking brakes; operating wedge.consequences of defect: failure of the parking brakes would allow the vehicleto roll free when left unattended on a steep grade. This could cause seriousinjury and damage to people and property.