Piston pin for Cummins 6BTAA5.9-C178

The piston pin, part number 3934047, serves as the mechanical link between the piston and the connecting rod in an internal combustion engine. By facilitating this connection, the component allows the connecting rod to oscillate while the piston moves linearly within the cylinder, enabling the transfer of energy generated during the combustion cycle to the crankshaft. This pin is engineered to manage the forces of compression, tension, and inertial loads occurring during the reciprocating motion of the engine assembly. Proper installation ensures the required clearance for lubrication and movement within the piston and rod bore.

This component is compatible with several Cummins engine models, including the 6BTAA5.9-C178, KTA38C-1050, QSM11-C335, and QSM19-C700. These engines are frequently utilized in heavy machinery such as industrial cranes, excavators, and power generation equipment. The pin is designed to meet the specific dimensional requirements of these engine series to maintain the integrity of the piston-rod assembly. Regular inspection of the piston pin during engine maintenance is standard practice to ensure the continued operation of the power unit.