1999 Navistar 9900 Recalls

VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS. THE ANTILOCK TRACTION RELAY VALVES WERE INCORRECTLY ASSEMBLED BY THE SUPPLIER. AN EXTRA CHECK VALVE WAS INSTALLED WHICH WILL NOT ALLOW THE TRACTION CONTROL SYSTEM TO FUNCTION PROPERLY.

THE REAR BRAKES CAN BE APPLIED AUTOMATICALLY DURING A TRACTION EVENT AND NOT RELEASE UNTIL THE AIR SYSTEM PRESSURE IS DEPLETED.

DEALERS WILL INSPECT THESE VEHICLES AND ALL ANTILOCK TRACTION RELAY VALVES FOUND DEFECTIVE WILL BE REPLACED.

VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH DANA/SPRAGUE WINDSHIELD WIPER ASSEMBLIES. THE KNURLED PIVOT SHAFT (WHICH OPERATES THE WINDSHIELD WIPER ARM) IS WELDED TO A LEVER, WHICH CONNECTS TO LINKAGE FROM THE WIPER MOTOR. THE WELD AT THE PIVOT SHAFT TO LEVER CAN FAIL.

SHOULD A FAILURE OCCUR DURING INCLEMENT WEATHER ON THE DRIVER'S SIDE WHILE THE VEHICLE IS IN MOTION, THE OPERATOR'S VISION WOULD BE PARTIALLY OBSCURED.

DEALERS WILL INSPECT THE WIPER SYSTEM, CONDUCTING A "STALL" TEST TO VALIDATE THE INTEGRITY OF THE WELD. ALL WIPER ASSEMBLIES FAILING THIS TEST WILL BE REPLACED.

VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS, TRANSIT AND SCHOOL BUSES, EQUIPPED WITH MERITOR AIR BRAKE AUTOMATIC SLACK ADJUSTERS. SOME OF THE AUTOMATIC SLACK ADJUSTERS HAD INSUFFICIENT TORQUE APPLIED TO THE GUIDE PAWL CAP SCREW.

WITHOUT SUFFICIENT TORQUE ON THE GUIDE PAWL CAP SCREW, THE BRAKES COULD GRADUALLY LOSE ADJUSTMENT, INCREASING THE VEHICLE STOPPING DISTANCE.

DEALERS WILL CHECK THE TORQUE ON THE AUTOMATIC SLACK ADJUSTER GUIDE PAWL. IF THERE IS NO TORQUE, THE BRAKES WILL BE ADJUSTED AND THE GUIDE PAWL WILL BE TIGHTENED TO 15-20 FT. LBS.