Item Affected: PARKING BRAKE:DRIVELINE:AIR
Date Announced: 02/20/1991
Description of Recall: IMPROPER PARK BRAKE CONTROL VALVES MAY HAVE BEEN INSTALLED; THE SUSPECT VEHICLE HAVE DISK BRAKES WITH PARK BRAKE VALVE DESIGNED FOR DRUM BRAKES.
Conequence: TRUCKS LEFT WITH PARK BRAKES ENGAGED COULD BEGIN TO ROLLAFTER THE DISK BRAKES COOLED, AND COULD RESULT IN A VEHICLE CRASH WITHOUTWARNING.
Action Need To Fix It: REPLACE CONTROL VALVE WITH THE CORRECT DISK BRAKE VALVE.
Notes: SYSTEM: PARKING BRAKE CONTROL VALVES.VEHICLE DESCRIPTION: HEAVY TRUCKS.