Description

The Cummins Thrust Washer 3901170 (Standard Size) is a precision-engineered engine component designed to control crankshaft end play and maintain proper axial alignment in Cummins diesel engines . This thrust washer is a direct replacement for Cummins OE part number 3901172 , ensuring OEM-correct fitment, durability, and long service life. Manufactured from high-quality, wear-resistant bearing material, this standard thrust washer is designed for engines that remain within factory crankshaft specifications. It helps absorb axial loads generated during clutch engagement and engine operation, protecting the crankshaft, main bearings, and engine block from premature wear. The Cummins 3901170 thrust washer plays a critical role in maintaining crankshaft stability, reducing internal friction, and ensuring smooth engine operation. Precision-machined surfaces provide consistent oil film retention and controlled clearance, which are essential for long-term reliability in heavy-duty diesel applications.