3681904 | Genuine Cummins® Air Brake Compressor

Description and Purpose:

The Cummins® Single Cylinder Air Brake Compressor (Part Number: 3681904) is a genuine replacement component engineered to meet OEM specifications. Specifically designed for QSX15, QSB, ISB, ISX engines, it features a water-cooled system, engine-supplied lubrication, and a durable flange mount. This unit is a direct fit, ensuring seamless integration into existing air brake systems.

Why Replacement is Important:

A functioning air compressor is critical for safe braking in commercial vehicles. Replacing the original unit with this OEM-matched part ensures that air pressure is properly maintained. Over time, wear and contamination can reduce efficiency—this compressor restores full system reliability without alterations.

Impact on Vehicle Performance:

With a maximum operating pressure of 145 psi and engineered for high rotational speed (3000 RPM), this compressor ensures steady air supply for optimal brake performance. The precise fit and matched specifications help maintain the vehicle’s original operational balance and safety standards.

Manufacturer Information:

Cummins® is globally recognized for its high-performance diesel engines and related components. As an OEM supplier, Cummins provides trusted, durable solutions designed to integrate seamlessly with commercial vehicle platforms, offering dependable operation in the most demanding environments.

Tags Category: Air Brake Compressor, Compressor, Brake System, Pneumatic System, Air System, Air Compression, Pneumatic Component, Compressed Air, Air Brake System Component, Single Cylinder

Warranty

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.