Vehicle recall 12V570000 · December 11, 2012
Thomas Built Buses SAF-T-Liner C2 and Thomas Built SAF-T-Liner C2
The subject fan pulley is part of the accessory drive system on the front of the engine.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- 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.
- 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.
- Remedy
- 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.
- Notes
- DTNA's recall campaign number is FL-635.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.
Recall details
- NHTSA campaign
- 12V570000
- Reported to NHTSA
- December 11, 2012
- Filed by
- Daimler Trucks North America
- Manufacturer campaign
- FL-635
- Owner notification
- January 4, 2013
- Vehicles potentially affected
- 6,296
- Initiated by
- the manufacturer
- Components
- Engine and engine cooling › Engine › Diesel
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Thomas Built SAF-T-Liner C2 (2011): 2011
- Thomas Built Buses SAF-T-Liner C2 (2012-2013): 2013, 2012
Has your Thomas Built been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Thomas Built dealer can also check your VIN. Recall repairs are free.