Description

The Cummins Piston Pin 3901793 is a precision-engineered internal engine component designed to provide a secure and reliable connection between the piston and connecting rod in Cummins diesel engines . This piston pin directly replaces Cummins OE part number 3901160 , ensuring OEM-correct fitment, strength, and long-term durability. Manufactured from high-strength, heat-treated alloy steel, this piston pin is engineered to withstand extreme combustion forces, high engine speeds, and continuous heavy-duty operation. Its precision-ground surface finish promotes smooth articulation, reduced friction, and extended service life for both the piston and connecting rod bushings. The Cummins 3901793 piston pin plays a critical role in maintaining correct piston alignment, minimizing side loading, and ensuring consistent engine balance. It is commonly replaced during engine overhauls, in-frame rebuilds, and piston assembly replacements , especially when installing new pistons or reconditioning connecting rods.