THE BRAKE CHAMBER MOUNTING STUDS CAN LOOSEN OR PULL THROUGH DUE TO FATIGUE IN THE BRAKE CHAMBER HOUSING CAUSED BY FOUNDATION BRAKE CHATTER.
THIS CONDITION CAN RESULT IN LOSS OF BRAKING CAPABILITY.
DEALERS WILL CHANGE THE BRAKE LINING MATERIALS, REPLACE THE WING BRACKET WITH A REINFORCED BRACKET AND INSTALL BRAKE CHAMBERS WITH REINFORCED CHAMBER HOUSING AND LARGER (1/2") MOUNTING STUDS.
SYSTEM: BRAKES; AIR;DRUM AND SHOE SYSTEM; CHAMBER.VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH 12" AND 16" FRONT BRAKE CHAMBERS MOUNTED ON ROCKWELL FOUNDATION BRAKES.NOTE: IF YOUR VEHICLE IS PRESENTED TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND THE REMEDY IS NOT PROVIDED FREE OF CHARGE WITHIN A REASONABLE TIME, CONTACT FREIGHTLINER AT 1-503-735-8000. ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-800-424-9393.