ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD
VEHICLE DESCRIPTION: SCHOOL AND TRANSIT FORWARD AND REAR ENGINE BUSES EQUIPPED WITH CUMMINS ISB AND ISC ENGINES. THE WIRING HARNESS TO THE COMBUSTION AIR INTAKE GRID HEATER CAN CHAFE AGAINST THE ENGINE AND WEAR THROUGH CAUSING AN ELECTRICAL SHORT IN THE GRID HEATER POWER SUPPLY. THE SHORT CAUSES THE FUSIBLE LINK TO FAIL.
Remedy: OWNERS WILL BE ADVISED TO REPLACE THE ORIGINAL GRID HEATER POWER SUPPLY HARNESS WITH FUSIBLE LINKS WITH A NEW GRID HEATER POWER SUPPLY HARNESS EQUIPPED WITH FUSES. IN ADDITION, A CLAMP WILL BE ADDED TO SUPPORT THE HARNESS AWAY FROM THE ENGINE COMPONENTS.
2,740 vehicles affected
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DRUM
VEHICLE DESCRIPTION: STEERING AXLE BRAKE DRUMS, PART NUMBER 61958B, USED IN AN AXLE ASSEMBLY COMBINATION SUPPLIED SOLELY TO BLUE BIRD BODY COMPANY BY WEBB WHEEL. THE BRAKE DRUM IS OVERSIZED IN THE AREA ABOVE THE MOUNTING FLANGE AND PREVENTS THE DISC WHEEL FROM MOUNTING FLAT AGAINST THE BRAKE DRUM.
Remedy: WEBB WHEEL WILL REPLACE BOTH STEERING AXLE BRAKE DRUMS. ALSO, IF CONTACT IS PRESENT BETWEEN THE BRAKE DRUM AND THE DISC WHEEL, BOTH STEERING AXLE BRAKE DRUMS AND BOTH STEERING AXLE DISC WHEELS WILL BE REPLACED.
433 vehicles affected