3906230
Crankshaft Thrust Bearing
Cummins®

The Crankshaft Thrust Bearing (Part Number: 3906230) in a Cummins® commercial truck engine is a vital component that helps to control axial movement of the crankshaft. It is positioned at the rear of the crankshaft, between the engine block and the crankshaft rear journal. The main function of the crankshaft thrust bearing is to absorb the axial loads generated by the reciprocating motion of the pistons and the rotational forces exerted on the crankshaft. By providing a low-friction surface, the thrust bearing prevents direct metal-to-metal contact between the crankshaft and the engine block. This not only reduces friction and wear but also ensures smooth and efficient engine operation. The crankshaft thrust bearing plays a crucial role in maintaining proper alignment and stability of the crankshaft within the engine block, thereby preventing excessive movement and potential damage to other engine components. In summary, the Crankshaft Thrust Bearing in a Cummins® commercial truck engine is responsible for absorbing axial loads, reducing friction, and ensuring the smooth rotation and stability of the crankshaft.