1992 International Harvester 3900FC

THE HYDRAULIC BRAKE SYSTEM ON THESE BUSES USES TWO HYDRAULIC PRESSURE SWITCHES TO OPERATE THE BRAKE LIGHTS AND THE BRAKE BOOSTER PUMP. THE BRAKE PRESSURE WARNING LIGHT CAN ACTIVATE WHEN ACTUAL SYSTEM FAILURE HAS NOT OCCURRED.

RiskA FALSE WARNING OF THE BRAKE PRESSURE WARNING LIGHT CAN CAUSE THE DRIVER TO IGNORE A WARNING WHEN AN ACTUAL PROBLEM EXISTS WHICH COULD RESULT IN AN ACCIDENT.

FixDEALERS WILL REPLACE THE TWO HYDRAULIC PRESSURE SWITCHES WITH ONE MECHANICAL SWITCH THAT IS ACTIVATED BY BRAKE PEDAL STROKE.

A GAP BETWEEN THE MASTER CYLINDER AND REMOTE BRAKE FLUID RESERVOIR ADAPTER, CAUSED BY AN OUT-OF-SPECIFICATION CONDITION OF THE ADAPTER, RESULTS IN BRAKE FLUID LOSS DURING BRAKE APPLICATION.

RiskBRAKE FLUID LOSS RESULTS IN LOSS OF PRESSURE CAUSINGPARTIAL LOSS OF BRAKING ABILITY, WHICH MAY LEAD TO AN ACCIDENT.

FixREPLACE THE OUT-OF-SPECIFICATION ADAPTERS.

THE FUEL TANK CAGE ASSEMBLY BOLTS MOUNTING THE VERTICAL STRAPS TO THE HORIZONTAL ANGLE WERE ASSEMBLED WITH THE THREADED END OF THE BOLTS FACING THE FUEL TANK.

RiskIF THE FUEL TANK CAGE IS STRUCK WITH SUFFICIENT FORCE ITIS POSSIBLE FOR THE BOLTS TO PIERCE THE FUEL TANK AND CAUSE FUEL LEAKAGE.FUEL LEAKAGE EXPOSED TO A SOURCE OF IGNITION CAN RESULT IN A FIRE.

FixTHE FUEL TANK CAGE MOUNTING BOLTS WILL BE REMOVED AND REINSTALLED WITH THE BOLT HEAD TOWARD THE TANK.

THE PRESSURE RELIEF VALVE WAS OMITTED IN THE AIR TANK. THE AIR TANK IS THE RESERVOIR FOR THE AIR SUSPENSION AND IS NOT BRAKE RELATED. WITHOUT THE PRESSURE RELIEF VALVE, THERE IS NO BACK-UP SYSTEM TO LIMIT AIR PRESSURE IN THE AIR SUSPENSION SYSTEM.

RiskLACK OF A BACK-UP SYSTEM TO LIMIT AIR PRESSURE BUILD UPCAN CAUSE EXCESSIVE PRESSURE IN THE AIR TANK AND CAN CAUSE THE TANK TO RUPTURE.THIS CAN RESULT IN PERSONAL INJURY TO ANYONE IN THE VICINITY.

FixINSTALL A PRESSURE RELIEF VALVE IN THE AIR TANK.

THE FUEL SYSTEM FAILED THE CRASH BARRIER TEST.

RiskTHE FUEL TANK WAS PUNCTURED, RESULTING IN FLUID LOSSGREATER THAN ALLOWED BY FMVSS 301, "FUEL SYSTEM INTEGRITY". FUEL SPILLS INA COLLISION COULD LEAD TO A VEHICLE FIRE IF EXPOSED TO A SOURCE OF IGNITION.

FixMODIFY THE FUEL TANK CAGE TO COMPLY WITH FMVSS 301.

THE POWER STEERING RETURN HOSE WAS INCORRECTLY ROUTED, AND COULD KINK AND REDUCE POWER STEERING ASSIST.

RiskIF THE POWER STEERING RETURN HOSE KINKS AND THE POWERASSIST IS REDUCED OR LOST, IT COULD RESULT IN LOSS OF STEERING CONTROL ANDAN ACCIDENT.

FixINSTALL A NEW, CORRECTLY ROUTED, POWER STEERING RETURN ASSEMBLY.

THE PINCH BOLT CONNECTING THE UPPER STEERING COLUMN TO THE LOWER STEERING COLUMN MAY NOT HAVE BEEN PROPERLY TIGHTENED AND SEPARATION OF UPPER AND LOWER STEERING COLUMNS CAN OCCUR.

RiskIF THE STEERING COLUMN SEPARATES WHILE THE BUS IS INMOTION, LOSS OF STEERING CONTROL AND A VEHICLE CRASH CAN OCCUR.

FixTIGHTEN THE UPPER PINCH BOLT AS REQUIRED.

SCHOOL BUS STEERING PROB.

Led to recall92V096000