2006 Mack CXN Problems, Complaints & Recalls

Problem: 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.

Risk: The head lights 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.

Fix: Dealers will replace the headlight switch. The recall began on february 27, 2009. Owners may contact mack at 1-800-528-6586.

Problem: On certain trucks equipped with a saf holland simplex fifth wheel, the lever arm pivot bolt may have been over tightened. An over tightened pivot bolt can distort the pivot bolt spacer sleeve, which may prevent the fifth wheel latch jaw from closing and latching securely around the trailer king pin.

Risk: There is a possibility that the pivot bolt can become loose without the driver's knowledge. When this occurs, the driver could drive away and the trailer could become disengaged, increasing the risk of a crash.

Fix: Dealers will replace the pivot bolt and sleeve with a hex head shoulder bolt and washer free of charge. The recall began on january 28, 2008. Owners may contact mack trucks at 1-800-528-6586.

Problem: On certain trucks equipped with aset ac model engines, the engine as configured with an external exhaust gas recirculation system makes servicing the fuel injection lines difficult when using traditional tools. Therefore, it is possible for fuel leaks to develop when removing and installing the fuel injection lines.

Risk: A leak in the fuel injection line may spray fuel on the hot surfaces of the exhaust gas recirculation system, which could result in an engine fire.

Fix: Dealers will replace the fuel injection lines free of charge. Note: this recall supersedes a previous campaign conducted in 2006 (please see 06v392). The recall began on september 11, 2007, with subsequent mailings every six weeks until april 2008. Owners may contact mack at 800-528-6586.

Problem: On certain trucks equipped with bendix sr-7 spring brake modulating valves, the internal rubber check valve may leak causing a delay in the application of the spring brakes to park the vehicle after the operator pulls the dash valve button.

Risk: This could delay or failure in applying the parking brakes which could result in a vehicle roll away, increasing the risk of a crash.

Fix: Mack is working with bendix to repair these vehicles (please see 07e037). Bendix will install a check valve repair kit for the affected sr-7 spring brake modulating valve free of charge. The recall began on january 10, 2008. Owners may contact bendix at 1-440-329-9000 or mack at 1-800-528-6586.

Problem: On certain trucks equipped with parker single check valves (scv) provided by bendix. The defect exists in the parker scv that connects with the supply port of the sr-7 spring brake modulating valve. After prolonged use of the parker scv, the valve body retainer may become excessively worn and eventually break apart. Pieces of the parker scv can become lodged inside the sr-7 spring brake modulating valve, potentially causing either leakage out of the sr-7 valve or preventing air from properly exhausting from the sr-7 valve.

Risk: This condition can cause a delay in the application of the spring brakes to park the vehicle after the operator pulls the dash valve button. These conditions can occur without warning, leading to unintended vehicle rollaway, brake drag, or in the case of loss of primary circuit, inability to modulate the spring brakes.

Fix: Mack is working with bendix to replace the parker single check valve. The recall began on january 9, 2008. Owners may contact bendix at 1-440-329-9000 or mack at 1-800-528-6586.

Problem: On certain trucks, a leak in the aset ac fuel injection line may spray fuel on the exhaust gas recirculation pipes that carry hot exhaust gases .

Risk: This could potentially result in an engine fire.

Fix: Mack has issued a stop work on this campaign under further notice (2-22-2007). The remedy does not adequately address the issue on all vehicles. Mack will re-release the recall in the near future. (please see nhtsa no. 07v159/mack recall no. Sco323 for vehicles that have had this repair already performed.) this recall has been superseded (please see 07v401/sc0324).

Problem: On certain trucks, the fuel line crossover bracket may prematurely fail and unexpectedly fall to the road. The location and size of the bracket draws a concern to the bracket being picked up and thrown by the drive axle wheels.

Risk: If the crossover bracket falls a crash may occur without prior notice.

Fix: Dealers will replace the brackets free of charge. The recall began on august 20, 2006. Owners may contact mack trucks at 1-800-528-6586.

Problem: On certain vehicles, the brake cam tubes on the steer axle may not have been greased.

Risk: The brake cam journal may corrode which could lead to the brakes dragging. This could result in a vehicle fire.

Fix: Dealers will remove the brake camshaft to inspect for corrosion. The brake camshaft will be replaced as required free of charge. The recall began on february 27, 2006. Owners may contact mack at 1-336-393-2233.

Problem: On certain vehicles. The brake cam tubes on the drive axle may not have been greased.

Risk: The brake cam journal may corrode which could lead to the brakes dragging. This could result in a vehicle fire.

Fix: Dealers will remove the brake camshaft to inspect for corrosion. The brake camshaft will be replaced as required free of charge. The recall began on january 18, 2006. Owners may contact mack at 1-336-393-2233.

Problem: On certain vehicles, the brake cam tubes on the steer and drive axles may not have been greased.

Risk: The brake cam journal may corrode which could lead to the brakes dragging. This could result in a vehicle fire.

Fix: Dealers will remove the brake camshaft to inspect for corrosion. The brake camshaft will be replaced as required free of charge. The recall began on february 27, 2006. Owners may contact mack at 1-336-393-2233.

Problem: On certain vehicles, the brake cam tubes on the steer and drive axles may not have been greased.

Risk: The brake cam journal may corrode which could lead to the brakes dragging. This could result in a vehicle fire.

Fix: Dealers will add grease to the brake cam tubes free of charge. The recall began on october 24, 2005. Owners may contact mack at 1-336-393-2233.

Problem: On certain heavy duty class 8 vehicles built with sheppard model m100 steering gear, the steering gear mounting pads, which attach the steering gear to the frame rail, may fail.

Risk: The steering gear could loosen leading to a sudden loss of steering, which could result in a crash.

Fix: Dealers will replace the steering gears. The recall began on may 6, 2005. Owners may contact mack at 1-610-709-2131.

Problem: On certain heavy duty class 8 trucks equipped with accuride aluminum wheels, the wheels were not properly pre-stressed. This allows cracks to develop over time.

Risk: This may eventually lead to wheel failure and possibly result in a vehicle crash.

Fix: Dealers will replace the wheels free of charge. The recall began on june 17, 2005. Owners may contact mack trucks at 610-709-2131.