TRAILER HITCHES:FIFTH WHEEL ASSEMBLY
VEHICLE DESCRIPTION: HEAVY DUTY CLASS 8 TRUCKS EQUIPPED WITH FONTAINE FIFTH WHEEL ASSEMBLIES. THE FIFTH WHEEL MOUNTING PLATES CAN CRACK.
Remedy: DEALERS WILL INSPECT AND REPLACE THE MOUNTING PLATES THAT ARE CRACKED.
90 vehicles affected
SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS
AIR SYSTEM BLOCKAGE IN THE AIR DRYER OCCURS DEGRADING THE MOISTURE REMOVING CAPABILITIES OF THE DRYER WHEN THE VEHICLE IS OPERATED IN A COLD ENVIRONMENT AND MOISTURE ACCUMULATES AND FREEZES IN THE AIR DRYER OR IN THE LINE BETWEEN THE DRYER AND THE AIR SYSTEM RESERVOIR. THE AIR DRYER CAN BECOME OVERPRESSURIZED CAUSING THE AIR DRYER CARTRIDGE TO SEPARATE FROM THE MOUNTING BASE.
Remedy: DEALERS WILL EQUIP AIR SYSTEMS WITH A PRESSURE RELIEF VALVE TO BE LOCATED BETWEEN THE COMPRESSOR AND THE AIR DRYER. THIS PRESSURE RELIEF VALVE IS INTENDED TO VENT IF EXCESSIVE PRESSURE DEVELOPS IN THE AIR DRYER.
1,224 vehicles affected
POWER TRAIN:DRIVELINE:CENTER SUPPORT BEARING
THE DRIVESHAFT CENTER BEARING SUPPORT BRACKET CAN CRACK AND BREAK.
Remedy: DEALERS WILL REPLACE THE CENTER BEARING HANGER BRACKET.
17,720 vehicles affected
ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN
THE ENGINE COOLING FAN BLADES MAY BREAK DUE TO INADEQUATE BLADE STRENGTH AROUND THE RIVETS THAT ATTACH THE BLADES TO THE FAN SPIDER.
Remedy: AN IMPROVED FAN WILL BE INSTALLED ON THESE VEHICLES.
11,000 vehicles affected
TRAILER HITCHES
THE CARRIER YOKE BOLTS WERE MANUFACTURED WITH WORN ROLLING THREAD DIES, CAUSING STRESS CONCENTRATIONS WHICH CAUSED CRACKS DURING THE QUENCHING PROCESS.
Remedy: REPLACE THE CARRIER YOKE BOLTS.
4,924 vehicles affected