Western Star C.O.E.: Brakes

The hazard

Certain trucks were built with a foot controlled brake valve that may, if a combination of conditions occur, malfunction by allowing air pressure to bypass the control piston "O" ring. If present, these conditions may, without warning, cause overly aggressive braking during normal brake applications resulting in the potential for a vehicle crash. Correction: Actuator plunger under brake pedal will be replaced as well as the floor mounted brake valve mounting plate and pedal mounting bracket under valve.

What to do

Contact your dealer; the remedy details were not included in the filing.