Belt pulley may fail causing engine overheat
Defect Summary
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.
Safety Consequence
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.
Corrective Action
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 safety recall began on january 4, 2013. owners may contact cummins at 1-812-377-5000 or dtna at 1-800-547-0712.
Similar Recalls
Other recalls from Daimler Trucks North America, Llc or involving Engine And Engine Cooling.
FAQ: Recall 12V570000
Your rights, the repair process, and what each field on this page means.
What is recall 12V570000?
NHTSA recall 12V570000 was issued by Daimler Trucks North America, Llc on December 11, 2012. It addresses: Belt pulley may fail causing engine overheat. The recall affects approximately 6,296 vehicles, with the defect involving the Engine And Engine Cooling component.
How do I get this recall repaired?
Contact any authorized Daimler Trucks North America, Llc dealer and reference NHTSA recall ID 12V570000 or the manufacturer campaign number FL-635. Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.