4991799 CUMMINS QSL9 Single Cylinder, Air Compressor

This high-strength single cylinder air compressor provides critical pneumatic pressure for heavy commercial vehicle engine systems. Designed with a single cylinder and a 318cm³ swept volume, the component is engineered to maintain consistent air output under demanding operational conditions. Its water-cooled design and robust construction ensure long-term reliability within the engine's cooling and pneumatic circuits.

4991799 is the OE-equivalent CUMMINS single cylinder air compressor used in the CUMMINS QSL and QSL9 engine systems. This unit features a cylinder bore of Ø85.00 and a stroke of 56 mm. It is specifically engineered to meet the rigorous demands of heavy-duty applications, ensuring seamless integration with existing engine architectures.

For workshop technicians, this component offers precise installation with an Air Outlet Port of M27x2 and an Air Unloader Port of M10x1. The unit is water-cooled (W), utilizing 3/4" - 16 UNF inlet and outlet ports to maintain optimal thermal stability. Regular inspection of the water jacket and port connections is recommended during routine maintenance to ensure peak performance.

The assembly includes an ESS feature and a water-cooled valve plate to enhance thermal management during continuous operation. The weight of 19.5 KG reflects its heavy-duty grade construction, providing the necessary stability for high-pressure air generation in professional transport environments.