3966520 CUMMINS QSL Single Cylinder, Air Compressor

The single cylinder air compressor serves as a critical component in the pneumatic systems of heavy commercial vehicles, providing the necessary compressed air for braking and auxiliary functions. This unit is engineered with high-strength components to ensure consistent pressure and durability under demanding operational conditions. Its water-cooled design helps maintain optimal temperatures during high-load cycles.

3966520 is the OE-equivalent of the CUMMINS 3966520 single cylinder air compressor used in the CUMMINS QSL engine systems. This product is fully compatible with CUMMINS QSL series architectures, ensuring seamless integration and maintaining the technical integrity of the engine's air supply system.

For workshop technicians, this assembly features a through-drive design and specific port specifications: a Ø25 air inlet port, M27x2 outlet port, and M10x1 unloader port. The water inlet and outlet ports use 3/4" - 16 UNF threads to facilitate precise installation and cooling-system connection. Regular inspection of the water-cooled valve plate and connection seals is recommended to ensure maximum service life.

Maintaining precise air pressure through a high-quality compressor is essential for vehicle safety and system response. This component is optimized for heavy commercial vehicle service environments where reliability is paramount.