International Harvester 4700

ON CERTAIN SCHOOL BUSES AND TRUCK MODEL VEHICLES MANUFACTURED BETWEEN FEBRUARY 28, 1999, THROUGH APRIL 5, 2004, THE ANTI-LOCK BRAKE SYSTEM ELECTRONIC CONTROL UNIT (ECU) MAY MISINTERPRET A CORRUPT WHEEL SPEED SIGNAL.

ON CERTAIN HEAVY DUTY TRUCKS, A BRASS FITTING CONNECTS THE DOUBLE CHECK VALVE TO THE BRAKE RELAY VALVE. WITH CERTAIN INPUTS TO THE VEHICLE, THE WEIGHT OF THE CHECK VALVE ON THE FITTING CAN CAUSE THE ASSEMBLY TO RESONATE. THE SUBJECT VIBRATION CAN CAUSE EXCESSIVE STRAIN LEVELS IN THE FITTING, WHICH COULD EVENTUALLY FATIGUE AND FAIL.

ON CERTAIN HEAVY DUTY TRUCKS EQUIPPED WITH BOSTROM DRIVER SEAT MODELS 910, 910SC, OR 914 AND INTERNATIONAL'S PARKING BRAKE CODE 04036, IF SOMEONE OUTSIDE THE CAB ADJUSTS/SLIDES THE DRIVER'S SEAT TO ITS MOST FORWARD POSITION, WITH THE PARKING BRAKE SET, THE SEAT WILL CONTACT AND RELEASE THE PARKING BRAKE LEVER.

ON CERTAIN MEDIUM AND HEAVY DUTY TRUCKS, A BRASS FITTING CONNECTS THE DOUBLE CHECK VALVE TO THE BRAKE RELAY VALVE. WITH CERTAIN INPUTS TO THE VEHICLE, THE WEIGHT OF THE CHECK VALVE ON THE FITTING CAN CAUSE THE ASSEMBLY TO RESONATE. THE SUBJECT VIBRATION CAN CAUSE EXCESSIVE STRAIN LEVELS IN THE FITTING, WHICH COULD EVENTUALLY FATIGUE AND FAIL.

VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH BOSTROM DRIVER SEAT MODELS (910, 910SC, OR 914) AND INTERNATIONAL'S PARKING BRAKE CODE 04036. IF SOMEONE OUTSIDE THE CAB ADJUSTS/SLIDES THE DRIVER'S SEAT TO ITS MOST FORWARD POSITION, WITH THE PARKING BRAKE SET, THE SEAT WILL CONTACT AND RELEASE THE PARKING BRAKE LEVER.

VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS. THE VEHICLES INVOLVED IN THIS RECALL WERE BUILT FOR EXPORT WITH MANUAL SLACK ADJUSTERS AND WERE SOLD IN THE US. THESE VEHICLES NEED TO HAVE AUTOMATIC SLACK ADJUSTERS IN ORDER TO COMPLY WITH THE REQUIREMENTS OF FMVSS 121, "AIR BRAKE SYSTEMS."

VEHICLE DESCRIPTION: TRUCKS EQUIPPED WITH ALLISON 1000 OR 2400 SERIES TRANSMISSIONS. THESE TRANSMISSIONS CAN EXPERIENCE PARK PAWL TO REAR COVER INTERFERENCE DUE TO AN OUT OF FLATNESS CONDITION.

VEHICLE DESCRIPTION: SCHOOL BUSES AND HEAVY DUTY TRUCKS EQUIPPED WITH REAR AXLE ASSEMBLIES PRODUCED BY DANA SPICER. CERTAIN REAR AXLE ASSEMBLIES WERE IMPROPERLY HEAT TREATED WHICH COULD ALLOW PINION BREAKAGE AT THE PINION THREADS.

THE DRIVE AXLE HOUSINGS CONSIST OF A PLATE STEEL CENTER SECTION AND TWO FORGED SPINDLES, ONE OF WHICH IS WELDED TO EACH END OF THE CENTER SECTION. EACH SPINDLE CONTAINS A KEYWAY SLOT IN WHICH THE LOCKING TAB FOR THE WHEEL BEARING NUT LOCKING MECHANISM IS INSERTED. THE LENGTH OF THE KEYWAY SLOT MAY NOT BE LONG ENOUGH TO ACCOMMODATE THE TAB CAUSING THE TAB TO BE DEFORMED OR DAMAGED DURING INSTALLATION.

THE STEERING COLUMN USED WAS INCORRECTLY MANUFACTURED. THE TUBE PORTION OF THE STEERING COLUMN HAS A WELDED END WITH A SPECIFIED LENGTH OF 5.5 INCHES. A 3.5 INCH WELDED END WAS USED BY MISTAKE. WITH THE SHORTER END, IT IS POSSIBLE THERE IS INSUFFICIENT ENGAGEMENT OF THE MALE END INTO THE TUBE PORTION AND SEPARATION OF THE COLUMN COULD OCCUR.

AT LOW AMBIENT TEMPERATURE, WITH THE PARKING BRAKE APPLIED ABD THE ENGINE RUNNING, PRESSURE CAN BUILD UP SUFFICIENTLY TO PARTIALLY PRESSURIZE THE BRAKE CHAMBER WHICH CONTROLS THE DDM PARK BRAKE AT THE REAR OF THE TRANSMISSION ALLOWING THE PARKING BRAKE TO PARTIALLY RELEASE.

THE BASE OF THE ELECTRONIC ACCELERATOR PEDAL IS MADE OF DIE CAST ALUMINUM. THE BASE MOUNTS DIRECTLY TO THE CAB FIREWALL. THE CAB FIREWALL IS NOT RIGID ENOUGH OR FLAT ENOUGH AT THE MOUNTING SURFACE, CAUSING STRESS ON THE ACCELERATOR BASE THAT WILL CAUSE THE MOUNTING PADS ON THE BASE OF THE PEDAL ASSEMBLY TO FAIL AND TOTALLY SEPARATE FROM THE FIREWALL.