NHTSA Campaign 15V275000

ENGINE AND ENGINE COOLING:ENGINE

Issued by Mack Trucks, Inc. · Reported May 11, 2015 · 2,124 vehicles affected

What's wrong

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.

Consequence

If engine oil comes into contact with a hot surface, there could be an increased risk of a fire.

Remedy

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.

Vehicles affected by this recall

Make Model Year Units
MACK LEU 2011 2,124
MACK LEU 2012 2,124
MACK LEU 2013 2,124
MACK LEU 2014 2,124
MACK LEU 2015 2,124
MACK LEU 2016 2,124
MACK LR6 2015 2,124
MACK LR6 2016 2,124
MACK MRU 2011 2,124
MACK MRU 2012 2,124
MACK MRU 2013 2,124
MACK MRU 2014 2,124
MACK MRU 2015 2,124
MACK MRU 2016 2,124

Source: NHTSA Campaign 15V275000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.