25 03 11 Cylinder Head for Air Brake Compressors

What does a compressor cylinder head do?

A compressor cylinder head is the critical cast component that seals the top of an air brake compressor's cylinder block. It provides the necessary housing for inlet and discharge valve seats, ensuring that compressed air is routed correctly through the discharge port without leakage. These heads are engineered to manage compression heat while maintaining structural integrity under high-pressure cycles.

Compatible vehicles and engines

This component is compatible with Cummins engines including ISL, ISM, N14, ISB, and ISC series. It is fitted to a wide range of heavy commercial vehicles such as Kenworth, Peterbilt, Freightliner, and Volvo trucks, as well as various bus models from Gillig and New Flyer. This cylinder head ensures precise fitment for specific compressor architectures used in these heavy-duty applications.

Installation and maintenance

When replacing a cylinder head, technicians should inspect the sealing face for flatness to prevent gasket leaks. It is essential to verify the bolt hole pattern and port dimensions against the existing unit to ensure a perfect seal. Maintaining proper torque during installation is vital for long-term performance in pneumatic brake systems.

Selection guidance

Consult your authorized distributor to check the compatibility list for your specific compressor model.