25 18 10 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.

Compatible vehicles and engines

This component is compatible with Knorr-Bremse systems and is fitted to various heavy commercial vehicles including Ford Trucks, Freightliner, Kenworth, Peterbilt, and Foton. It is also suitable for Cummins engine applications across multiple models such as the International 4300 and Blue Bird Vision. Because the same vehicle model can use a different compressor depending on engine options, selection should always be based on the compressor's own reference number.

Installation and maintenance

Installation requires precise alignment to ensure the sealing face remains flat, preventing air leaks. Technicians should verify that discharge port threads and bolt hole patterns match the original components to maintain system integrity during high-pressure operation.

Troubleshooting and selection

Regular inspection of the cylinder head can help prevent pressure drops in the pneumatic braking system. Check for signs of surface wear or gasket residue to ensure optimal performance in heavy-duty environments.

OE cross-reference

25 18 10 (Compressor Cylinder Head) is the equivalent of the Knorr-Bremse OE number. This part directly replaces Knorr-Bremse OE number K047839K50.