Cummins C3974539 Crankshaft Assembly

The Cummins C3974539 is a forged steel crankshaft assembly designed for the B6.7 engine platform, covering ISB, QSB, and ISDE 6.7-liter diesel variants. This assembly includes the crankshaft, thrust collar, and timing gears as a matched kit. It is engineered to OEM specifications for journal hardness, surface finish, and balance to ensure durability in heavy-duty commercial vehicle and construction machinery applications. Primary OEM cross-references include Cummins 3974539 and 5289840. Aftermarket interchange numbers include VB455, C5267496, and 5486279. Typical fitment covers Dongfeng Tianlong heavy-duty trucks, Yutong, Zhongtong, and Haige transit buses, as well as various industrial equipment powered by the Cummins 6.7L engine family. The unit weighs approximately 46 kg and ships in a wooden crate measuring 78 x 28 x 31 cm.