Mack DM recalls

What is wrong

Mack trucks is recalling certain model year 2002 through 2004 cl, cv, le, mr, rb, rd, and model year 2003 through 2004 dm heavy trucks manufactured from february 1, 2002 through september 30, 2003, 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.

Risk

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.

Remedy

Mack will notify owners, inspect and replace any affected axle beams free of charge. The safety recall began on march 5, 2010. Owners may contact mack at 1‑800‑866‑1177.

Recall number 10V069000 · Recall details

What is wrong

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.

Risk

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.

Remedy

Mack will notify owners, inspect and replace any affected axle beams free of charge. The safety recall began on august 14, 2009. Owners may contact mack at 1‑800‑866‑1177.

Recall number 09V240000 · Recall details

What is wrong

On certain trucks, the bolt that attaches the pitman arm to the steering gear may not be tightened properly.

Risk

This may affect the performance of the steering, which may result in a crash.

Remedy

Dealers will check the torque on the bolt that attaches the pitman arm to steering gear and tighten the bolt properly. The recall beagn august 18, 2005. Owners contact mack at 1-800-2528-6586.

Recall number 05V349000 · Recall details

What is wrong

On certain heavy-duty, class 8 trucks, the lower and upper steering shaft pinch bolts were improperly tightened.

Risk

As a result of this condition, the steering shaft could possibly come loose which could lead to a sudden loss of vehicle control, which could result in a crash.

Remedy

Dealers will inspect the torque at the suspect joints, and correct if necessary free of charge. The recall began on may 5, 2005. Owners may contact mack at 1‑610‑709‑2131.

Recall number 05V118000 · Recall details

What is wrong

On certain class 8 chassis built with hendrickson lift axles which contained webb brake drums, the brake drums could experience premature crack of the braking surface resulting in reduction or complete loss of braking on that wheel end or loss of brake drum pieces.

Risk

Loss of braking ability could result in a vehicle crash, possibly causing injuries or death.

Remedy

Webb wheel is conducting the owner notification and remedy for this campaign. Webb will notify customers, inspect the brake drums and replace any drums that fail inspection. Owners should contact webb at 1‑800‑633‑3256 or mack at 1‑610‑709‑3337.

Recall number 04V258000 · Recall details

What is wrong

Certain trucks fail to comply with the requirements of federal motor vehicle safety standard no. 121, "air brake systems." the front brake chamber on some 18,000 lb. And 20,000 lb front axle assemblies is too small to meet stopping distance requirements.

Risk

This could cause the stopping distance to be increased, which could result in a crash.

Remedy

Dealers will replace the front brake chambers. The recall began april 21, 2004. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1‑610‑709‑3337.

Recall number 04V118000 · Recall details

What is wrong

Vehicle description: heavy duty trucks equipped with certain meritor-wabco brake system two and four port relay valves. The valve may stick open when a high-pressure application is released.

Risk

When the valve sticks open, it can result in a total loss of air from either the service or the park brake system. The driver may lose braking ability under a service application, possibly resulting in a vehicle crash.

Remedy

Dealers will replace these valves. Owner notification began november 16, 2001. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1‑610‑709‑3011 or meritor wabco at 800‑535‑5560.

Recall number 01V189004 · Recall details

What is wrong

Vehicle description: class 8 trucks equipped with felsted electronic accelerator pedals. The return springs can break on the accelerator pedals that are equipped with stainless steel or electroplated wire return springs.

Risk

This condition could cause the pedal to go to full throttle if both return springs break, increasing the risk of a crash.

Remedy

Replacement accelerator pedals equipped with return springs manufactured of music wire with one additional coil on each spring and with an organic coating, eliminating electroplating will be installed.

Recall number 00V230003 · Recall details

What is wrong

Vehicle description: heavy duty trucks built with bendix air ABS with an ec-17 1030r electronic control unit (ecu), there have been reports of unwanted ABS activation at low speeds caused by 1) chafed ABS wheel speed sensor wires on rotating parts or 2) a damaged component at the wheel end that generates a certain type of erratic sensor signal.

Risk

This condition could cause the ABS ecu to exhaust the air at the air brake modulators for one or more of the wheels. This could result in extended braking distances and a possible crash.

Remedy

Dealers will replace the ABS ecu.

Recall number 00V232009 · Recall details

What is wrong

Vehicle description: class 8 heavy duty truck chassis equipped with mack 16,000 lb., 18,000 lb., or 20,000 lb. Heavy duty steering axles. The inner wheel bearing cone for the steering axle wheel hub assembly does not properly fit onto the mack steering axle spindle assembly. Improper fit of the bearing to the spindle increases the stress levels to the steering axle spindle which could cause spindle failure.

Risk

If the spindle fails, a loss of driver control could occur, increasing the risk of a vehicle crash.

Remedy

Dealers will remove the left and right hub/drum assemblies from the steering axles and replace the inner wheel bearing cones and cups.

Recall number 99V014001 · Recall details

What is wrong

Fuel injection system reconfiguration to comply with engine emission standards cause higher engine vibration levels which lead to early wear and complete failure of the secondary throttle return mechanism.

Risk

In the event the primary throttle return fails, failure of the secondary throttle return system would not provide protection against loss of throttle control.

Remedy

A new production secondary throttle return system configuration will be installed.

Recall number 94V032000 · Recall details

What is wrong

The carrier yoke bolts were manufactured with worn rolling thread dies, causing stress concentrations which caused cracks during the quenching process.

Risk

This condition can cause bolt failure and allow thedriveline to separate from the carrier assembly.

Remedy

Replace the carrier yoke bolts.

Recall number 93V024000 · Recall details