2005 Mack CHN Problems, Complaints & Recalls

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 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 this recall has been superseded (please see 07v401/sc0324).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 heavy duty class 8 trucks equipped with fxl axles, there is a potential that the draglink may contact the brake slack adjuster during full wheel cut and articulation of the chassis.

Risk: If this occurs, the slack adjuster may be damaged to a point where brake performance is compromised, which may result in a vehicle crash.

Fix: Dealers will replace the brake assemblies on the front axle. The recall began on august 19, 2005. Owners may contact mack trucks at 610-709-2131.

Problem: On certain trucks equipped with the fxl axle and meritor 16.5 x 5 brakes with dust shields, there may be interference between the dust shield mounting bolt and the knuckle on the front axle. As a result of the interference, the bolt joint between the wheel end and the knuckle may not meet the torque requirements.

Risk: This could result in vibration or brake performance issues. Braking capability would be diminished, increasing the risk of a crash.

Fix: Dealers will remove the hub and brake assembly to install a new dust shield free of charge. The recall began on august 17, 2005. Owners may contact mack trucks 610-709-2131.

Problem: On certain heavy duty class 8 diesel trucks equipped with aset ac engines, the location of the fuel inlet hose may result in overheating or abrasion of the hose, which may lead to a premature failure.

Risk: If the hose fails, fuel can be sprayed on the exhaust manifold, which could potentially lead to an engine compartment fire.

Fix: Dealers will repair and replace the fuel inlet hose free of charge. The recall began on february 14, 2005. Due to some quality and supply issues with parts to support this safety recall, owners may have been informed during april 2005,that the safety recall was on hold. These issues have now been resolved. For owners who have not had their vehicle(s) repaired, contact a mack parts and service center immediately to schedule an appointment to have your vehicle(s) repaired. Owners may contact mack trucks at 610-709-2131.