SERVICE BRAKES, AIR
VEHICLE DESCRIPTION: DUAL STEER CLASS 8 HEAVY DUTY TRUCKS. THE FRONT STEER AXLE BRAKES DO NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 121, "AIR BRAKE SYSTEMS."
Remedy: DEALERS WILL INSTALL A RELAY VALVE IN THE FRONT STEERING AXLE BRAKE SYSTEM.
166 vehicles affected
SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION:LINES AND FITTINGS
VEHICLE DESCRIPTION: CLASS 8 HEAVY DUTY TRUCKS. THE AIR SUSPENSION CONTROL VALVE SUPPLY LINE WAS NOT PLUMBED THROUGH AN AIR PRESSURE PROTECTION VALVE. IN THE EVENT OF A FAILURE, THERE WOULD BE LOSS OF AIR PRESSURE IN THE 'B' SYSTEM AIR RESERVOIR THAT SUPPLIES AIR PRESSURE FOR THE FRONT STEER AXLE BRAKES.
Remedy: DEALERS WILL INSTALL THE NECESSARY AIR PRESSURE PROTECTION VALVE.
95,013 vehicles affected
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS
THE REAR MOST AXLE OF THE TANDEM AXLE SET COULD HAVE INOPERABLE BRAKES ON ONE OR BOTH WHEELS BECAUSE THE BRAKE S-CAM WAS INCORRECTLY INSTALLED.
Remedy: DEALERS WILL INSPECT THE BRAKE SYSTEM AND REPAIR THE S-CAM ASSEMBLY IF FOUND REVERSED.
149 vehicles affected
SERVICE BRAKES, AIR
THE TRACTION SOLENOID EXHAUST CAN BE OBSTRUCTED DUE TO INADEQUATE DRAINAGE AND A BUILD-UP OF ROAD CONTAMINATION BETWEEN THE MOUNTING BRACKET AND THE SOLENOID HOUSING. THE OBSTRUCTED EXHAUST PREVENTS THE RELAY VALVE CONTROL AIR PRESSURE FROM VENTING AFTER A DIFFERENTIAL BRAKING TRACTION EVENT.
Remedy: DEALERS WILL REMOVE THE SUSPECT VALVE AND INSTALL A NEW VALVE THAT HAS A MODIFIED SOLENOID HOUSING WHICH WILL ALLOW FOR SUFFICIENT DRAINAGE AND A NEW VALVE MOUNTING BRACKET WITH INCREASED HEIGHT TO REDUCE ENTRY OF CONTAMINATION.
771 vehicles affected
SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM
THE REAR SUSPENSION AXLE RETENTION PLATE CAN BREAK UNDER NORMAL USE, AFFECTING AXLE ALIGNMENT.
Remedy: DEALERS WILL REMOVE AND REPLACE THE AXLE RETENTION CLIP PLATES ON AFFECTED VEHICLES.
6,034 vehicles affected