Cummins 3326153 Crankshaft Pulley

The Cummins 3326153 crankshaft pulley is a critical drive component engineered for the NTA855 and NT855 series heavy-duty diesel engines. It functions as the primary interface for transmitting rotational torque from the crankshaft to the accessory drive belt system, powering alternators, water pumps, and fan drives. Constructed from high-strength cast iron or ductile iron, the pulley features precision-machined V-ribbed or multi-groove profiles to match OEM belt specifications. It incorporates a pressed-on or bolted hub design with a keyway or interference fit for secure crankshaft mounting. The component undergoes dynamic balancing to minimize torsional vibration and ensure smooth engine operation at rated speeds up to 2100 RPM. This part supersedes or cross-references legacy Cummins part numbers 3900237, 3900234, and 3900162. It is widely utilized in construction machinery such as Shantui bulldozers and stationary power generation units equipped with the N14/NT855/NTA855 engine platform.