3948846 CUMMINS QSL Single Cylinder, Air Compressor

This single cylinder air compressor serves as a critical component within the engine's pneumatic-cooling interface, ensuring consistent air pressure for heavy-duty operations. Designed with high-strength components, the unit utilizes a water-cooling system to manage thermal loads during intensive service cycles. The precision-engineered Ø85.00 cylinder bore and 56 mm stroke are optimized for stable output in demanding environments.

3948846 is the OE-equivalent of the CUMMINS 3948846 single cylinder air compressor used in the CUMMINS QSL engine series. This part provides seamless integration with existing engine architectures, maintaining the required pneumatic integrity for heavy commercial vehicle systems. It is engineered to meet the strict operational requirements of the CUMMINS QSL platform.

For workshop technicians performing engine maintenance or system overhauls, this component offers a direct fit with standard M27x2 and M10x1 port configurations. The water-cooled design (W) requires specific attention to the 3/4" - 16 UNF inlet and outlet ports to ensure optimal thermal regulation. Regular inspection of the unloader port and cooling connections is recommended to prevent pressure fluctuations or overheating during long-haul transport.

Maintaining precise clearance in the single cylinder assembly is vital for long-term reliability. This unit is built to handle the high-pressure demands of modern heavy-duty diesel engines, ensuring that the air supply remains consistent for downstream pneumatic systems.