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NHTSA Campaign 15V344000

ENGINE AND ENGINE COOLING:ENGINE

Issued by Daimler Trucks North America LLC · Reported Jun 3, 2015 · 746 vehicles affected

What's wrong

Daimler Trucks North America LLC (DTNA) is recalling certain model year 2008-2015 Thomas Built Buses Saf-T-Liner HDX school buses manufactured May 25, 2008, to December 18, 2014, and equipped with certain Cummins Westport ISL G engines. 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 is an increased risk of a fire.

Remedy

Cummins will notify owners on behalf of DTNA, and dealers secure the ends of the 90-degree elbow. In addition, the electronic control module (ECM) will be reprogrammed 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 DTNA customer service at 1-800-745-8000, or Cummins customer service at 1-800-343-7357. DTNA's number for this recall is FL-681.

Vehicles affected by this recall

Make Model Year Units
THOMAS BUILT BUSES SAF-T-LINER HDX 2008 746
THOMAS BUILT BUSES SAF-T-LINER HDX 2009 746
THOMAS BUILT BUSES SAF-T-LINER HDX 2010 746
THOMAS BUILT BUSES SAF-T-LINER HDX 2011 746
THOMAS BUILT BUSES SAF-T-LINER HDX 2012 746
THOMAS BUILT BUSES SAF-T-LINER HDX 2013 746
THOMAS BUILT BUSES SAF-T-LINER HDX 2014 746
THOMAS BUILT BUSES SAF-T-LINER HDX 2015 746

Source: NHTSA Campaign 15V344000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.