3944525 CUMMINS QSL Single Cylinder, Air Compressor

The single cylinder air compressor is a critical component designed to provide consistent pneumatic pressure within heavy commercial vehicle engine systems. This high-strength component is engineered to manage high-pressure air requirements with precision and durability. Its robust construction ensures reliable operation under demanding thermal and mechanical stresses common in heavy-duty environments.

3944525 is the OE-equivalent of the CUMMINS 3944525 single cylinder air compressor used in the CUMMINS QSL engine series. This part is specifically engineered for seamless integration with the designated engine architecture, ensuring that the pneumatic system maintains optimal pressure levels. Every technical dimension, from the Ø85.00 cylinder bore to the M27x2 outlet port, is strictly aligned with the required specifications.

For workshop technicians, this unit features a water-cooled design (W) to maintain thermal stability during operation. The assembly includes a through-drive mechanism and an integrated ESS feature to support advanced system control. Maintenance professionals should verify the water inlet and outlet port connections (3/4" - 16 UNF) and ensure the air unloader port (M10x1) is clear during routine inspections to prevent pneumatic system failures.