2008 Mack Cxu problems

What is wrong

Mack Trucks, Inc. (Mack) notified the agency on February 20, 2014, that they are recalling certain model year 2010-2012 CHU, CXU, GU and TD vehicles manufactured from June 16, 2009, through July 8, 2011. While continuing to research the scope of the issue, Mack expanded the recall on November 18, 2014 to include certain model year 2008-2009 and 2013-2014 CHU, CXU, GU and TD vehicles manufactured from June 16, 2009, through July 8, 2011. Having completed its investigation, Mack once again expanded the recall during February 2015 to include an additional 53,780 vehicles from model years 2007 and 2015. The recall now covers model year 2007-2015 includes CHU, CXU, GU and TD vehicles produced October 13, 2006, through October 3, 2014. In the affected vehicles, the Electronic Power Distribution Module (EPDM) may be contaminated from water leaks in, and around, the windshield. If exposed to water leaks, contaminants such as road salts may deposit on the EPDM.

Risk

Deposits of contaminants may result in the circuits being bridged, creating a high resistance short, increasing the risk of a fire.

Remedy

Mack has notified owners, and dealers will inspect the EPDM. If contamination has occurred, dealers will replace the EPDM and address the leak, free of charge. Owners of model year 2010-2012 CHU, CXU, GU and TD vehicles were initially notified April 24, 2014. Owners affected by the recall expansions were notified in February 2015. Owners may contact Mack Trucks at 1‑336‑393‑2000. Mack's number for this recall is SC0375.

Recall number 14V078000 · Recall details

What is wrong

Mack is recalling certain model year 2007-2010 CHU and CXU vehicles, manufactured from October 13, 2006, through December 23, 2009 and equipped with daytime running lights and fog lights. A short in the fog light circuit may cause the low beam headlight circuit to cut out.

Risk

If the low beam headlights go out, the driver may lose visibility, increasing the risk of a crash.

Remedy

Mack will notify owners, and install an additional wiring harness on the affected vehicles, free of charge. The safety recall began on November 14, 2012. Owners may contact Mack Trucks at 1‑800‑866‑1177.

Recall number 12V434000 · Recall details

What is wrong

On certain trucks, the bolts that attach the steering gear to the frame may not have been tightened to the specified torque.

Risk

Loss of steering control could occur increasing the risk of a crash.

Remedy

Dealers will tighten the bolts free of charge. The recall began on december 10, 2007. Owners may contact mack trucks at 1‑800‑528‑6586.

Recall number 07V531000 · Recall details

What is wrong

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.

Remedy

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.

Recall number 07V497000 · Recall details

What is wrong

On certain trucks, the daytime running lights (drl) module may contain a suspect metal-oxide-semiconductor field effect transistor (mosfet) that could overheat.

Risk

If the transistor overheats, it could possibly result in a vehicle fire.

Remedy

Dealers will replace the suspect drl module free of charge. The recall began on october 31, 2007. Owners may contact mack trucks at 1‑800‑528‑6586.

Recall number 07V478000 · Recall details

What is wrong

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.

Remedy

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.

Recall number 07V360000 · Recall details

What is wrong

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.

Remedy

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.

Recall number 07V361000 · Recall details

Investigation has not identified a defect.complaints have abated.see closing report for further details.

EA09009

Odi is closing this preliminary evaluation and opening an engineering analysis (ea09-009) to further identify and evaluate the vehicle environment and brake system factors that may be causing or contributing to extended stopping distance perfromance in certain vehicles.

PE09010

ODI opened this investigation based on a review of Early Warning Field reports which indicated instances of the air compressor discharge line coming loose or separating on certain model year 2008 Mack Trucks.Further review indicated that Mack had issued a Service bulletin (#SB 531014) in May 2008.A revised air line was incorporated into production in May 2008 and the ferrule type fitting was changed to a 37 degree flare compression type fitting.The failure resulted in a diminished air supply to the truck's braking system.During the investigation, ODI collected information from Mack, examined warranty claims, discussed the problem with fleet managers and confirmed that the subject vehicles meet the requirements of FMVSS 121, (Air Brake Systems).This standard includes a requirement for an air pressure gauge, and an audible and visual warning signal. The air system normally operates at 100 -120 psi.If the air discharge line becomes loose, the system will continue to hold air but replenishment may be diminished depending on the degree of leakage.If the air line separates, air system replenishment will cease and air pressure will drop as system air is used during brake applications.As the air pressure drops, the dashboard mounted gauge provides a continuous pressure status. Drivers are required to have a CDL (commercial drivers' license) with air brake endorsement and part of the training to obtain such a license includes learning how to monitor and respond to the air pressure system gauges.As the pressure drops below 60 psi, the audible/ visual warning device activates alerting the driver to take appropriate action to stop the truck in a safe location.If the air pressure is allowed to drop below 45 psi, the parking brakes will began to apply.ODI confirmed that approximately 94% percent of the trucks have engine brakes that provide supplemental braking and allow a driver with a leaking discharge line to use the compression of his engine to slow the truck, thus further preserving available air pressure.Using warranty claim data, ODI contacted 47 owners/drivers to gain an understanding of the problem and learned that 16 of the 47 discovered the problem while the truck was parked.Of the 31 drivers that discovered the problem while driving only 13 found it necessary to stop on the roadway's shoulder.Of those 13, four made temporary repairs in place and continued driving the truck. The remaining 18 were able to safely drive to a location away from the roadway to wait for assistance.Thus, 38 of the 47 vehicles surveyed were repaired in a garage or facility. Nine of the 47 were apparently towed.ODI has carefully reviewed the warranty claims and concluded that 639 reports are applicable in that warranty was performed on those trucks to replace or repair the defective air compressor fitting.Based on fleet interviews and warranty claim review, ODI believes the vast majority of the warranty claim repairs were performed in safe locations.The data indicates that the majority of failures were resolved off the highway in a safe location due to the warning system required by FMVSS 121 or during the driver's daily truck inspection required by the Federal Motor Carrier Safety Administration.During the investigation, ODI established that no crashes, injuries or fatalities have occurred as a result of this problemOn May 21, 2009, Mack announced that they would conduct an Owner Notification Program to address this matter and as of June 24, 2009, 824 trucks have been repaired. After examining all the relevant facts (no crashes, deaths or injuries, mandated audible and visual warning, 94% of the subject vehicles ha

PE08069