2004 Mack CHN problems

What is wrong

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.

Remedy

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.

Recall number 07V401000 · Recall details

What is wrong

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.

Remedy

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 the federal safety agency no. 07v159/mack recall no. Sco323 for vehicles that have had this repair already performed.) this recall has been superseded (please see 07v401/sc0324).

Recall number 06V392000 · Recall details

What is wrong

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.

Remedy

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.

Recall number 06V290000 · Recall details

What is wrong

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.

Remedy

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.

Recall number 05V439000 · Recall details

What is wrong

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.

Remedy

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.

Recall number 05V111000 · Recall details

What is wrong

On certain heavy duty class 8 trucks equipped with air suspension proprietary axles and adjustable lengh torque rods, an interference between the adjustable torque rod and the brake chamber on the left side of the chassis may exist. The spring brake chamber clamp ring could possibly be distorted over time resulting in loss of air, which could lead to the spring brake at the chamber being inadvertently applied.

Risk

Braking capability would be diminished, increasing the risk of a crash.

Remedy

Dealers will repair and replace the adjustable torque rod, with a fixed length torque rod, inspect and repair the brake chamber free of charge. The recall began on may 3, 2005. Owners may contact mack trucks at 610‑709‑2131.

Recall number 05V112000 · Recall details

What is wrong

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.

Remedy

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.

Recall number 05V015000 · Recall details