25 15 11 Cylinder Head for Air Brake Compressors

What does a compressor cylinder head do?

A compressor cylinder head is the cast service part that closes off the top of an air brake compressor's cylinder block and carries the seats for the inlet and discharge valves. It holds the piston's compressed air without leaking, routes it out through the discharge port, and carries away part of the compression heat from the body. This component is vital for maintaining stable pneumatic pressure within the vehicle's braking system.

Compatible vehicles and engines

This cylinder head is engineered to fit various heavy commercial vehicle models, including Peterbilt, Freightliner, Kenworth, and International trucks. It is specifically compatible with Cummins ISC and ISL9 engines, providing a reliable solution for bus and truck fleet maintenance. This part is also fitted to vehicles from Volvo, Scania, and MAN engines where applicable.

Installation and maintenance

To ensure proper function, technicians should verify that the discharge port thread type and bolt hole pattern match the existing unit exactly. Even a minor deviation in flatness on the sealing face can lead to air leaks. When installing, always follow the manufacturer's torque specifications to prevent gasket failure under high pressure.

Troubleshooting air leaks

Regular inspection of the cylinder head can help prevent sudden pneumatic system failures. If air leaks are detected near the compressor block or if compression pressure drops, this component may require replacement to restore system integrity.