|Vehicle Make / Model:
THOMAS BUILT / SAF-T-LINER C2
Manufacturer: Daimler Trucks North America
Report Receipt Date: DEC 11, 2012
NHTSA CAMPAIGN ID Number: 12V570000
NHTSA Action Number: N/A
Component: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
Potential Number of Units Affected: 6,296
Daimler Trucks North America (DTNA) is recalling certain model year 2011 through 2013 Thomas Built school buses manufactured from March 2010 through July 2012, equipped with Cummins ISB6.7 diesel engines manufactured from February 16, 2010, through May 4, 2012, containing a fan pulley, part number 3914462. The subject fan pulley is part of the accessory drive system on the front of the engine. This system is used to drive such components as the refrigerant compressors, the radiator fan, and the engine water pump. The web of the pulley can fatigue over time, causing the pulley to fail.
If this occurs, the fan belt may lose engagement of the water pump, allowing the cooling system to overheat. This may result in exceeding temperature limits, potentially disabling the school bus. If the school bus is occupied when it becomes disabled, the occupants would need to exit the vehicle and be transferred to another vehicle, putting them at risk of injury.
Cummins will notify owners of the recall. Repairs will be performed by Cummins authorized service facilities. A new fan drive pulley will be installed free of charge. The recall is expected to begin during December 2012. Owners may contact Cummins at 1-812-377-5000 or DTNA at 1-800-547-0712.