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.
Safety risk
WHEN THE FUSIBLE LINK FAILS, INSULATION ON THE FUSIBLE LINK CAN IGNITE, CREATING A FIRE RISK IN THE ENGINE COMPARTMENT.
Manufacturer 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.
Service brakes, hydraulic: foundation components: drum
Manufacturer
BLUE BIRD BODY COMPANY
Vehicles affected
433
Reported to NHTSA
1998-05-12
Defect description
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.
Safety risk
PROLONGED EXPOSURE CAN LEAD TO DISC WHEEL CRACKING AND SUBSEQUENT DISC WHEEL FAILURE. THIS COULD ALSO LEAD TO LOOSE FLANGE NUTS AND LOSS OF A WHEEL IF NOT DETECTED.
Manufacturer 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.
Owner complaints
A complaint is one person's report to a federal agency. It is not a finding.
No complaints recorded for this model year.
Safety recall repairs are provided free of charge by franchised dealers, regardless of vehicle age or mileage. This page displays aggregated data for the model year. To check recall status for a specific vehicle, search its VIN at nhtsa.gov.