Description

The Cummins Thrust Washer 3901170 (STD) is a precision-engineered diesel engine component designed to control crankshaft end play and axial movement , ensuring proper crankshaft alignment and smooth engine operation in Cummins diesel engines. This thrust washer is a direct replacement for Cummins OEM part number 3901172 , making it ideal for standard-size crankshaft applications during engine rebuilds and overhauls. Manufactured from high-quality bearing-grade materials , this standard thrust washer is built to withstand axial loads, continuous friction, and heavy-duty operating conditions common in Cummins diesel engines. The precision-machined surfaces promote consistent oil film retention, reduced friction, and long service life under demanding conditions. Designed for accurate fitment and correct crankshaft clearance , the Cummins 3901170 STD thrust washer helps maintain proper end play, protect main bearings, and prevent premature wear caused by excessive crankshaft movement. Replacing thrust washers during an engine rebuild is critical to restoring OEM-level reliability and preventing internal engine damage. This thrust washer is commonly used in Cummins diesel engine rebuild and overhaul applications , including on-highway trucks, industrial engines, and heavy-duty equipment requiring dependable internal engine components.