11 35 20 Compressor Cylinder Head Replacement

What does a compressor cylinder head do?

A compressor cylinder head is the cast service component that sits on top of an air brake compressor's cylinder block and seals the compression chamber from above.

Function and technical role

This component plays a vital role in the pneumatic system by housing the seats for the inlet and discharge valves, as well as the internal air passages and cooling cavities. Because it directly governs both the compressor's air output and its running temperature, using high-strength components is essential for maintaining system pressure under heavy-duty conditions.

Design variations and configurations

Technicians can choose from various configurations depending on the specific compressor architecture, including single-cylinder, twin-cylinder, air-cooled, or water-cooled designs. Some versions are supplied with valve plate kits, while others feature unloader ports to receive governor signals for precise pressure control.

Maintenance and selection guidance

When performing maintenance, it is important to verify that the head matches the specific compressor architecture. Since different engine options may require different designs even within the same vehicle model, always consult your authorized distributor to ensure correct fitment.