2011 VOLVO VNL

TRAILER HITCHES:FIFTH WHEEL ASSEMBLY

Volvo Trucks North America (Volvo) is recalling certain model year 2011-2013 VNL and VNM trucks manufactured June 21, 2010, to December 14, 2012. The affected trucks are equipped with Fontaine Ultra LT Fifth Wheel connectors, which, due to cumulative damage to the fifth wheel and its locking mechanism, have a locking mechanism that may fail to operate or to properly engage.

Risk: If the fifth wheel and locking mechanism are sufficiently damaged, the locking mechanism may fail to operate as intended and the trailer may unexpectedly detach from the tractor, increasing the risk of a crash.

TIRES

Volvo Trucks North America (Volvo) is recalling certain model year 2011-2014 VAH and VNL trucks manufactured May 12, 2010, to October 31, 2014. The affected vehicles may experience premature tire failure during certain operating conditions such as high speeds, heavy load, and high road temperature.

Risk: Premature tire failure could increase the risk of a vehicle crash.

FORWARD COLLISION AVOIDANCE: CRASH IMMINENT BRAKING

Volvo Trucks of North America (Volvo) is recalling certain model year 2011-2015 VNL and 2014-2015 VNM trucks manufactured November 17, 2010, through February 5, 2014, and equipped with enhanced cruise control and without side fairings. In the affected vehicles, the active braking component of the enhanced cruise control can become disabled.

Risk: If the active braking feature becomes disabled, the vehicle may not automatically activate the brakes as intended when the enhanced cruise control system is in use, thereby increasing the risk of a crash.

POWER TRAIN:CLUTCH ASSEMBLY

Volvo Trucks North America (Volvo) is recalling certain model year 2007-2014 VAH, VHD, VNL, VNM, and VT models. The affected vehicles were built without a redundant clutch disengagement switch. Without a redundant switch, a loss of signal from the brake air pressure switch can prevent the clutch from automatically disengaging when the brake is applied.

Risk: Without a signal to disengage the clutch when the brakes are applied, the distance required to stop the truck may lengthen, increasing the risk of a crash.

VISIBILITY/WIPER

Volvo Trucks North America (Volvo) is recalling certain model year 2011-2012 VAH, VHD, VNL, and VNM trucks manufactured February 1, 2010, through September 30, 2010 and June 1, 2011, through November 30, 2011. The windshield wiper motor may fail.

Risk: Inoperable wipers may result in poor driver visibility, increasing the risk of a crash.

PARKING BRAKE:CONVENTIONAL:AIR

Volvo Trucks North America (Volvo) is recalling certain model year 2011-2013 VHD and VNL vehicles manufactured December 13, 2010, through July 17, 2012. These vehicles are equipped with an MGM Type 24 J-series piston parking brake chamber. The brake chambers may leak pressure allowing the parking brake to drag when it is supposed to be released. Brake dragging could lead to overheated brake components.

Risk: Overheated brake components could result in a fire.

SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE

VOLVO IS RECALLING CERTAIN MODEL YEAR 2011-2012 VHD AND MODEL YEAR 2011-2013 VNL AND VNM VEHICLES, MANUFACTURED FROM DECEMBER 2, 2010, THROUGH JANUARY 18, 2012, AND EQUIPPED WITH BENDIX ATR-6 TRACTION RELAY VALVES. IN EXTREMELY COLD CONDITIONS, THESE BENDIX RELAY VALVES MAY POTENTIALLY DEVELOP INTERNAL LEAKAGE. INTERNAL LEAKAGE CAN LEAD TO AIR PRESSURE BEING DELIVERED TO AFFECTED PRIMARY OR SECONDARY BRAKE CAUSING CONTINUOUS BRAKE APPLICATION.

Risk: INADVERTENT BRAKE APPLICATION CAN CAUSE THE BRAKES TO OVERHEAT AND LEAD TO A FIRE. INADVERTENT BRAKE APPLICATION CAN CAUSE THE WHEELS TO LOCK-UP LEADING THE DRIVER TO LOSE CONTROL OF THE VEHICLE, INCREASING THE RISK OF A CRASH.

TRAILER HITCHES:FIFTH WHEEL ASSEMBLY

VOLVO TRUCKS IS RECALLING CERTAIN MODEL YEAR 2011-2012 VNL AND VNM TRUCKS MANUFACTURED FROM MAY 1, 2010, THROUGH JANUARY 31, 2011. DURING THE COUPLING PROCESS, IT IS POSSIBLE FOR THE DRIVER TO PARTIALLY CLOSE THE FIFTH WHEEL LOCK AND IF SOLELY RELYING ON A TUG TEST (PULL TEST), THE DRIVER MAY THINK THAT THE FIFTH WHEEL LOCK IS PROPERLY COUPLED TO THE TRAILER KING PIN WHEN IN FACT IT IS NOT PROPERLY COUPLED.

Risk: IF THE DRIVER DRIVES AWAY WITH A TRAILER THAT IS NOT PROPERLY COUPLED, THE TRAILER CAN COME LOOSE AND POTENTIALLY RESULT IN A VEHICLE CRASH.

ELECTRICAL SYSTEM:12V/24V/48V BATTERY

VOLVO TRUCKS IS RECALLING CERTAIN MODEL YEAR 2011 VNL TRUCKS MANUFACTURED FROM MARCH 23, 2010, THROUGH DECEMBER 22, 2010. THERE IS A POTENTIAL FOR THE VEHICLE TO START WITHOUT WARNING BECAUSE OF AN UNINTENDED PATH TO GROUND THAT EXISTS. THIS CAN OCCUR WHEN EITHER THE NEGATIVE BATTERY CABLE IS DISCONNECTED AT THE BATTERY/FUSIBLE LINK OR IF THE FUSIBLE LINK OPENS AS A RESULT OF A SHORT CIRCUIT.

Risk: THIS PRESENTS A RISK OF INJURY WITH NONOPERATIONAL CONDITIONS SUCH AS WHEN THE VEHICLE IS BEING SERVICED.

SERVICE BRAKES, AIR:SLACK ADJUSTERS

VOLVO TRUCKS IS RECALLING CERTAIN MODEL YEAR 2011-2012 VHD, VNL, AND MODEL YEAR 2012 VNM TRUCKS MANUFACTURED FROM OCTOBER 15, 2010, THROUGH JANUARY 31, 2011, AND EQUIPPED WITH GUNITE AUTOMATIC SLACK ADJUSTERS. DUE TO AN INCOMPLETE "KNITTING" OF THE IRON AT THE TIME OF CASTING, INADEQUATE STRUCTURAL INTEGRITY OF THE SLACK ADJUSTER HOUSING CAN OCCUR, WHICH COULD CAUSE THE HOUSING TO BREAK AT THE HANDLE UNDER NORMAL OPERATING LOADS.

Risk: SLACK ADJUSTERS WITH THIS FLOW NOTCH COULD CRACK UNDER NORMAL BRAKING CONDITIONS CAUSING LOSS OF BRAKING WHICH COULD RESULT IN A VEHICLE CRASH.

VISIBILITY:POWER WINDOW DEVICES AND CONTROLS

VOLVO TRUCKS IS RECALLING CERTAIN MODEL YEAR 2010-2011 VNL TRUCKS. THE ADHESIVE USED IN THE UPPER WINDOW IN THE BUNK AREA TO SECURE THE GLASS MAY DEBOND.

Risk: THIS COULD ALLOW THE GLASS TO COME LOOSE AND POSSIBLY FALL OUT INCREASING THE RISK OF A CRASH.