Cummins 3609962 Fuel Injector Assembly

The Cummins 3609962 is an STC (Step Timing Control) fuel injector assembly designed for high-horsepower K-series and QSK-series diesel engines. It meters and atomizes fuel directly into the combustion chamber under high pressure. This component is critical for maintaining emissions compliance and engine performance in 670–2200 HP applications. Compatible engine platforms include K19, KTA19, K38, KTA38, K50, KTA50, QSK19, QSK38, and QSK50. Typical installations span marine main and auxiliary propulsion, mining haul trucks, oilfield fracturing units, and standby prime power generator sets. The injector body is constructed from high-speed tool steel alloys to withstand cyclic combustion pressures. Installation requires replacement of sealing components (cross-reference 3023095). OEM cross-references include 3095773, 3349860, 3349861, and 3609849. HS Code: 840999.