Mack Mru 2016

• Recall 109752 [USA]: If engine oil comes into contact with a hot surface, there could be an increased risk of a fire.
  Mack trucks, inc. (mack) is recalling certain model year 2011-2016 mack mru and leu trucks manufactured june 25, 2010, to april 30, 2015, and 2015-2016 lr6 trucks manufactured from december 18, 2014 through march 6, 2015. Excessive engine crankcase pressures may cause the 90-degree elbow of the vent tube assembly to detach from the crankcase ventilation breather, possibly allowing engine oil to come into contact with hot surfaces.
  cummins will notify owners on behalf of mack, and cummins service centers will administer the repairs which include securing the ends of the 90-degree elbow and reprogramming the electronic control module (ecm) with software that can adjust the engine output under misfire conditions to limit crankcase pressures. These repairs will be performed free of charge. The recall began on june 12, 2015. Owners may contact mack customer service at 1-800-528-6586 or cummins inc. At 1-800-343-7357. Mack's number for this recall is sC0391.
  owners may also contact the national highway traffic safety administration vehicle safety hotline at 1-888-327-4236 (tty 1-800-424-9153), or go to www.Safercar.Gov.

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• Recall 2017216 [Canada]: Electrical
  Certain vehicles may have been built with an incorrectly sized alternator cable. This could potentially result in the cable overheating, which may increase the risk of a vehicle fire causing injury and/or damage to property. Correction: dealers will replace the alternator cable.

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• Recall 2016495 [Canada]: Powertrain
  On certain vehicles, the cap nut that retains the interaxle driveshaft yoke to the rear axle input shaft may prematurely loosen. If the nut were to loosen and come off, the yoke could separate from the axle input shaft and cause the drive shaft to disconnect. A disconnected drive shaft would result in a loss of motive power, and create a road hazard, both of which could increase the risk of a crash causing injury and/or damage to property. Correction: dealers will inspect the torque on the cap nut, and the nut will be replaced if the torque is found under specification. Note: this is an expansion of recall 2016-079.

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• Recall 2016078 [Canada]: Steering
  On certain vehicles, the roll pin may not have been installed on the upper yoke on the steering shaft during assembly. If the roll pin is missing, the steering shaft may disconnect from the yoke. Separation of the shaft from the yoke would result in complete loss of steering, increasing the risk of a crash causing injury and/or damage to property. Correction: dealers will inspect the steering shaft, and replace it if the roll pin is found missing.

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• Recall 2015500 [Canada]: Engine
  On certain vehicles equipped with natural gas powered engines, the turbocharger oil supply line may make contact with or interfere with one or more of the following: the turbocharger inlet elbow, the oem clean air intake clamp, or the air fuel control tube. The resulting contact or interference may damage the turbocharger oil supply line, possibly resulting in an oil leak. Oil leaking onto hot engine surfaces could increase the risk of a fire, and could increase the risk of injury and/or property damage. Correction: dealers will replace the oil line.

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• Recall 2015348 [Canada]: Engine
  On certain vehicles equipped with cummins westport isl-g engines, excessive engine crankcase pressure could cause the vent tube assembly elbow to detach from the breather. This could allow engine oil to come in contact with hot surfaces, increasing the risk of fire resulting in injury and/or damage to property. Correction: dealers will install clamps at both ends of the elbow of the breather tube assembly and reprogram the electronic control module (ecm) to improve diagnostic capabilities.

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To ensure accuracy and for your safety, it is recommended to do a free VIN recall check here or here [USA] - UK - Canada.

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

• Mdrive transmission failure to disengage investigation # PE20005

  On april 28, 2020, the office of defects investigation (odi) opened pe20-005 to investigate reports of 2013-2015 mack chu and cxu trucks equipped with mdrive transmissions continuing to push forward when stopping, possibly increasing the risk of a crash. After more field reports were discovered, the scope of the investigation was expanded to cover my 2013-2016 vehicles. The mdrive transmission is macks version of volvos i-shift transmission, an automated manual transmission that allows gear shifting without the use of a clutch pedal. Early i-shift transmissions were recalled (13v-268) to address a missing redundant clutch disengagement switch that could prevent the clutch from automatically disengaging when the brake was applied. If a loss of signal from the brake air pressure switch occurred, the clutch would remain engaged while braking.Although macks mdrive transmission adopted the latest volvo i-shift design and was built with the redundant clutch switch, odi received field reports alleging that the mdrive transmission would not disengage when coming to a stop like the volvo i-shift transmissions in recall 13v-268.After more than a year of information requests, data exchanges and grouping, and analyzing data, odi was able to correlate two versions of transmission software (id 23084009 and id 23084004), with two frequently replaced parts (solenoid valve and cylinder assy clutch) as outliers. However, mack dismissed the replacement parts as being normal service parts for worn clutch systems.According to mack, unlike the i-shift recall, loss of one or more of the switches would not keep the clutch engaged but might cause a delay in the clutch disengaging, possibly due to the software/control system settings, the worn parts and system reaction time.To demonstrate the possible switch failure outcomes, mack outfitted a subject model truck with a panel that could disable each switch on command. During test drives at the mack facility, the demonstrator truck stopped when the brake was applied each time, and the truck did not stall when the brake was applied, even when the clutch was engaged. Even though failure of one of the switches could delay clutch disengagement, the stopping distance would still be shorter than one of the recalled volvo i-shift transmission trucks. With this information, as well as a lack of known crash incidents related to this complaint, odi concludes that the mack vehicles do not present an unreasonable risk to motor vehicle safety. Although odi is closing this pe, mack/volvo should continue improving the transmission control unit software to further refine the clutch disengagement strategy. The closing of this investigation does not constitute a finding by nhtsa that a safety-related defect does not exist. Claims are still being submitted and the agency will continue to monitor the issue and reserves the right to take further action if warranted by new circumstances.
  

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• Vehicle roll away investigation # PE20003

  The office of defects investigation (odi) received a tip from a large fleet operator of refuse trucks about a potential defect condition that may result in a vehicle roll away. The subject vehicles are single-unit trucks equipped with certain bendix pp-1 push-pull pneumatic park brake control valves. These subject components are mounted to the dashboard and allow the driver to apply and release the parking brakes. They have a 1/8? Npt threaded fitting in the exhaust port and an exhaust pipe to vent exhaust air outside the truck cab. The subject components may experience an accelerated wear out condition in certain severe-duty applications with high-frequency use of the parking brakes. When the knob is pulled out to apply the parking brakes, supply side air may continuously leak past the worn valve and escape through the exhaust port. This wear out condition may not be readily detected by the driver because the sound is muffled by the exhaust pipe configuration. An exhaust flow restriction, such as an insufficient diameter exhaust port, threaded fitting or exhaust pipe, may allow back-pressure to develop and pressurize the delivery port. This may inadvertently send a signal to the park control port of the sr-7 spring brake modulating control valve to release the parking brakes, possibly resulting in a vehicle roll away.The reporting fleet operator is aware of at least 4 roll away incidents related to the alleged defect on subject vehicles in the united states. In one case, surveillance video recorded the driver applying the parking brakes moments before the vehicle rolled away. In some cases, the root cause was determined by post-incident examination of subject components by the component supplier and/or by a third-party forensic engineering company hired by the fleet operator. In one incident, a subject vehicle rolled more than 100 meters away and crashed into a parked car and a residential structure, causing in excess of $150,000 in property damage. In another incident, a subject vehicle rolled away and crashed into several other refuse trucks parked at the depot. The reported injury incident occurred when a driver dumped a load of refuse at a landfill, pulled into the clean out area, set the parking brakes, locked out the main battery disconnect and proceeded into the rear body to perform normal clean out duties. While inside the rear body, the driver reportedly heard the sound of rushing air, the parking brakes reportedly released and the truck began to roll away. In a panic, the driver jumped out of the moving vehicle and broke his ankle, which later required surgery. The truck came to rest approximately 50 meters away against a dirt berm. A preliminary evaluation has been opened to assess the alleged defect.
  

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