United States 99V082001
WESTERN STAR TRUCKS, INC.
The problem
VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH 15" (WIDTHS: 4" AND 5") AIR-ACTUATED Q-PLUS CAM BRAKE EQUIPPED WITH FEDERAL MOGUL FRICTION PRODUCTS 3030-197 BRAKE LINING (MERITOR R201) BRAKE LININGS AND ACTUATED WITH TYPE 20 AIR CHAMBERS X 5.5" SLACK ADJUSTERS. THE AFFECTED BRAKES WERE INSTALLED PREDOMINANTLY IN HEAVY TRUCK FRONT AXLE ASSEMBLIES. THESE ASSEMBLIES DO NOT FULLY SATISFY THE TEST PERFORMANCE REQUIREMENTS OF FMVSS NO. 121, "AIR BRAKE SYSTEMS."
Risk
THIS CONDITION COULD CAUSE DECREASED BRAKING EFFORT.
What owners should do
THE BRAKE LINING WILL BE REPLACED WITH UPGRADED BRAKE LININGS.
Units 50