Engineering Analysis · OVERHEATING FRONT AND REAR BRAKES · Opened 2002-12-03 · Closed 2004-02-10
Investigation
Action number
EA02034
Type
Engineering Analysis
Open date
2002-12-03
Close date
2004-02-10
Manufacturer
INTERNATIONAL TRUCK & ENGINE CORPORATION
Affected makes
INTERNATIONAL; INTERNATIONAL HARVESTER
Affected components
SERVICE BRAKES, HYDRAULIC
Affected model years
1997, 1998, 1999, 2000, 2001, 2002
Affected (make, year) variants
55
Summary
THIS INVESTIGATION FOCUSED ON INTERNATIONAL MEDIUM DUTY TRUCKSAND SCHOOL BUS CHASSIS WEIGHING UP TO 33,000 POUNDS, EQUIPPED WITH HYDRAULIC BRAKES AND BUILT WITH THE BOSCH ZERO OFFSET PIN SLIDE (ZOPS)BRAKE SYSTEM CALIPERS.INTERNATIONAL USED THE ZOPS CALIPERS FROM APRIL 1997 THROUGH JUNE 2002.ODI WAS CONCERNED ABOUT REPORTS OF THE BRAKE CALIPERS STICKING IN THE APPLIED POSITION, RESULTING IN EXCESSIVE HEAT.AS THE INVESTIGATION PROGRESSED, ODI BECAME AWARE OF WHEEL END FIRES, SOME OF WHICH OCCURRED ON SCHOOL BUSES.DURING THE INVESTIGATION ODI OBTAINED WARRANTY DATA WHICH WAS SORTED AND ANALYZED BY VRTC TEST ENGINEERS AND ODI TO GAIN AN UNDERSTANDING OF THE MAGNITUDE OF THE PROBLEM.AFTER A THOROUGH WARRANTY DATA ANALYSIS, RELATED TESTING AND DOCUMENT REVIEWS, ODI MET WITH INTERNATIONAL, SHARED THE DATA ANALYSIS AND SHORTLY AFTERWARDS, INTERNATIONAL AGREED TO A SAFETY RECALL.FURTHER DETAILS ARE INCLUDED ON PAGES 2 - 4.