Cummins QSK23 shares the proven power cylinder design of our QST30 and QSK78 engines, for reliability and durability you can count on. Every day and every year. Here are just some of the heavy-duty components that make the QSK23 an excellent choice for the largest construction equipment.Cummins Construction Engine QSK23

• One-Piece Cast Iron Block- Heavy-duty design with wide cylinder spacing for long life and excellent rebuild ability.
• Full-Authority Electronic Controls- Sophisticated electronic controls optimize combustion based on engine load, atmospheric conditions, even fuel quality; they also provide advanced monitoring, diagnostic and reporting capabilities, with integrated engine protection features
• High-Pressure Injection- Works at up to 29,000 psi to optimize engine response with the best fuel economy and lowest emissions
• Precision-Honed Cylinder Liners- Precise liner machining with superior metal technology creates exceptional surface smoothness and durability; made of ferrous cast ductile iron so that expansion and contraction won't cause excess wear
• Ferrous Cast Ductile Iron Pistons- For even expansion and contraction during thermal cycles; the same technology found in our 3500-hp QSK78
• Large-Diameter Camshaft- 105 mm of hardened surfaces handle high load capacities; created specifically to work with high-pressure injection systems
• Rear Gear Train- Significantly reduces engine noise
• Seven-Bolt Cylinder Head- Delivers increased clamping force, enabling high cylinder and injector pressures
• Two-Stage Oil Filter- Combination full-flow and bypass oil filter reduces maintenance costs as it extends service intervals