MAY 2011 -- Mack Trucks is recalling certain model year 2008-2011 GU heavy trucks manufactured from September 12, 2007, through April 8, 2011, with a four battery cable design. As a result of the routing and clipping used, the battery cables may come into contact with frame hardware, which, as a result of chafing, may cause the insulation to become worn to a point where a short occurs. A short can potentially cause a vehicle fire. Dealers will re-route the battery cables and replace the cables if chafing has occurred. This service will be performed free of charge. The safety recall is expected to begin on or before July 1, 2011.   11V-292

MAY 2011 -- Mack Trucks is recalling certain model year 2011-2012 CHU, CXU, GU, LEU and MRU 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. Slack adjusters with this flow notch could crack under normal braking conditions causing loss of braking which could result in a vehicle crash. Mack Trucks will notify owners and dealers will replace the subject slack adjusters free of charge. The safety recall is expected to begin on or before July 1, 2011.   11V-272

MAY 2011 -- Mack Trucks is recalling certain model year 2012, CHU, CXU, GU, MRU, LEU, and TD trucks equipped with a Meritor driveline. The tubing used to assemble the affected drivelines has a nonconforming seam weld with insufficient bonding of the material. This can result in seam weld fracture when torque is applied. Once the tube seam weld is fractured, the driveline may become inoperable which may result in a disabled vehicle or debris from the driveline may fall on the roadway, both of which can increase the risk of a crash. Dealers will replace the drivelines free of charge. The safety recall is expected to begin on or before July 1, 2011.   11V-295

APRIL 2011 -- Mack Trucks is recalling certain model year 2008-2012 MRU and LEU heavy trucks manufactured from January 3, 2007, through February 3, 2011. The electrical circuitry in these vehicles may not provide adequate overcurrent protection. In the event of an electrical overage, the fuse that should prevent the over current from reaching the mirror switch circuit may fail, such that the mirror switch can overheat. An overheated switch could cause a vehicle fire. Dealers will install a relay harness to prevent the mirror switch from overheating. They will also inspect the mirror switch and if signs of overheating are shown,replace that switch. All inspections and repairs will be performed free of charge. The safety recall is expected to begin on or before May 30, 2011.  11V-212

MARCH 2011 -- Mack Trucks is recalling certain model year 2008-2011 CHU and CXU heavy trucks manufactured from January 2008 through July 2010. There may be an interference with the bolts used to secure the fifth wheel to the frame that can prevent the bolts from being torqued to specification. The bolts may fail and could result in the fifth wheel coming loose causing the trailer to separate from the tractor increasing the risk of a crash. Dealers will inspect and replace the bolts as required free of charge. The safety recall is expected to begin on or before May 30, 2011.   11V-209

OCTOBER 2010 -- Mack Trucks is recalling certain model year 2010 through 2011 CXU, heavy trucks manufactured from August 12, 2009, through August 31, 2010. The rear hold-down brackets that secure the battery box lid may be rotated too far forward, which may restrict the battery box lid from properly seating. If this occurs, the battery box lid may come off when stepping on the step, which may cause a person to fall from the vehicle resulting in personal injury. Mack will inspect and adjust the rear hold-down brackets as required free of charge. The safety recall is expected to begin on or before December 1, 2010. Owners may contact Mack Trucks at 1-800-866-1177. 10V-536

OCTOBER 2010 -- Mack Trucks is recalling certain model year 2011 CHU and CXU, heavy trucks manufactured from July 13, 2010, through August 13, 2010, without rear mud flap hanger brackets. These vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard No. 108, "Lamps, Reflective Devices, and Associated Equipment." The rear conspicuity treatment typically found on the mud flap hanger brackets may not have been installed in the alternate positions as allowed in the regulation on vehicles manufactured without rear mud flap hanger brackets. Lack of reflectors could lead to reduced visibility of the vehicle increasing the risk of a crash. Dealers will inspect and install conspicuity treatment as required free of charge. The safety recall is expected to begin on or before December 1, 2010.   10V-537

SEPTEMBER 2010 -- Mack is recalling certain model year 2008 through 2011 GU and MRU model vehicles manufactured with a front tow glad hand option from October 22, 2007 through June 30, 2010. The actuation and release timing of the vehicles exceeds the limit which fails to conform to the requirements of Federal Motor Vehicle Safety Standard No. 121, "Air Brake Systems." If the brakes do not perform as they should, a vehicle crash could occur. Mack will notify owners and repair the vehicle free of charge. The safety recall is expected to begin during October 2010.   Mack's recall campaign number is SC0345. 10V-404

OCTOBER 2009 -- Mack Trucks is recalling certain model year 2008-2010 trucks which fail to comply with the requirements of Federal Motor Vehicle Safety Standard No. 121, "Air Brake Systems." Mack has not yet provided a consequence. Dealers will rework the air system free of charge. The safety recall is expected to begin during November 2009. Owners may contact Mack Trucks at 1-800-528-6586.  09V-395

JUNE 2009 -- Mack is recalling 338 model year 2009 MRU and LEU heavy duty trucks manufactured from August 20 through November 26, 2008 equipped with certain Haldex quick release valves (QRV). The rubber diaphragm inside the QRV may experience delamination resulting in significant levels of air pressure leakage past and/or through the diaphragm, or the development of a bubble in the diaphragm which may trap air pressure in the valve and not allow the service brakes to release. Malfunction of the air brake system could result in a vehicle crash. Mack will notify owners and repair the affected vehicle free of charge. The safety recall is expected to begin on or about July 13, 2009. 09V-194

JUNE 2009 -- Mack is recalling 10,300 Model Year 2004 and 2005 CL, CV, DM, LE, and RB and Model Year 2004 RD heavy trucks manufactured from October 1, 2003 through September 30, 2004, equipped with axle beams manufactured by Bharat Forge. The axle beam may have transverse shear lines on the bottom of the axle from the trimming process. These lines, if present, can promote initiation of cracks, which over time may possibly lead to axle beam failure and a vehicle crash can occur. Mack will notify owners, inspect and replace any affected axle beams free of charge. The safety recall is expected to begin duringJuly 2009.  09V-240

DECEMBER 2008 -- Mack is recalling 34,269 MY 1999-2005 CX and MY 2004-2008 CXN trucks. The headlight switch may prematurely fail resulting in inoperative or intermittent headlights. This could potentially cause a crash while driving at night. The headlights may not operate properly which could result in intermittent or no headlight function. This could impair a driver's visibility, increasing the risk of a crash. Dealers will replace the headlight switch. The recall is expected to begin on or about February 27, 2009.  08V-688