25 15 10 Cummins compatible Compressor Cylinder Head

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 allows a compressor to be rebuilt in place instead of being replaced as a complete unit.

Compatible vehicles and engines

This cylinder head is engineered to fit various heavy commercial vehicle applications, including models from Peterbilt, Kenworth, Freightliner, and Blue Bird. It is specifically compatible with Cummins ISL9 and ISC engine configurations used in buses and trucks from manufacturers such as New Flyer, Volvo, and International. It is also fitted to various models from Scania, MAN, and Volvo.

Installation and maintenance

When replacing a cylinder head, technicians should verify the bolt hole pattern and discharge port thread type to ensure an exact match. Because even small deviations in flatness on the sealing face can cause air leaks, it is essential to inspect the sealing surface during installation. Always consult the vehicle manufacturer's service manual for specific torque requirements to maintain system integrity.

System reliability

Proper maintenance of the compressor assembly helps prevent pressure drops in the pneumatic braking system. Using high-strength components ensures long-term reliability under heavy load conditions. Consult your authorized distributor.

OE cross-reference

25 15 10 (Compressor Cylinder Head) is the equivalent of the Cummins OE number. This part directly replaces Cummins OE number 4089216.