4991799 CUMMINS QSL Single Cylinder, Air Compressor

This single cylinder air compressor is engineered to provide consistent pneumatic pressure within the heavy-duty engine system. Designed with high-strength components, it manages critical air delivery functions through a precision-engineered Ø85.00 mm bore and a 56 mm stroke. The water-cooled design ensures thermal stability during high-load operations, making it an essential component for maintaining system integrity in demanding environments.

4991799 is the OE-equivalent of the CUMMINS 4991799 single cylinder air compressor used in CUMMINS QSL engines. This unit provides seamless integration with existing engine architectures, ensuring that workshop technicians can perform replacements with confidence in fitment and performance. The part is specifically designed to meet the rigorous demands of the heavy commercial vehicle sector.

Installation requires attention to the water cooling ports (3/4" - 16 UNF) and the M27x2 air outlet configuration to ensure a leak-free connection. For optimal service life, technicians should verify the condition of the water inlet and outlet connections during routine maintenance intervals. This component is built to withstand extreme industrial cycles while maintaining precise air discharge through its M10x1 unloader port.

This product is specifically optimized for the CUMMINS QSL series to ensure that your vehicle's pneumatic systems remain fully operational under heavy duty cycles. By utilizing high-grade materials, it prevents common failure points associated with thermal expansion and pressure fluctuations.