3949098 CUMMINS QSL9 Single Cylinder, Air Compressor

This single cylinder air compressor is a critical component designed to provide consistent pneumatic pressure within the engine system. Built to withstand the rigorous demands of heavy commercial vehicle operations, the unit utilizes high-strength components to ensure long-term operational stability. The integrated water-cooling system and specialized port configurations are engineered to maintain optimal thermal management during high-load cycles.

3949098 is the OE-equivalent of the CUMMINS 3949098 single cylinder air compressor used in the CUMMINS QSL and QSL9 engine series. This precision-engineered part ensures seamless integration with existing engine architectures, maintaining the strict tolerances required for heavy-duty air brake systems and pneumatic auxiliary functions.

For workshop technicians, this component offers straightforward installation thanks to its standardized M27x2 outlet and M10x1 unloader port. The water-cooled design requires careful monitoring of the 3/4" - 16 UNF inlet and outlet connections to ensure efficient heat dissipation. Regular inspection of the water cooling lines and air port seals is recommended during standard service intervals to prevent system pressure fluctuations.

Designed specifically for heavy-duty compatibility, this unit provides reliable air delivery for critical vehicle functions. It is an essential replacement part for maintaining the pneumatic integrity of heavy commercial vehicle engines where high-pressure stability is paramount.