25 27 50 Compressor Cylinder Head for Heavy Duty

What does a compressor cylinder head do?

This 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. These components allow a compressor to be rebuilt in place instead of being replaced as a complete unit.

Vehicle and engine compatibility

The component is compatible with several heavy commercial vehicle makes including KamAZ, Dongfeng, Yutong, Iveco Bus, Liaz, Ford Trucks, Nefaz, Volkswagen, Paz, and Zhongtong. It is specifically designed for use with Cummins engines such as the ISBe and ISLe series. This part is engineered to maintain pressure integrity within Knorr-Bremse systems and other pneumatic configurations.

Installation and maintenance

When performing maintenance, technicians should inspect the valve seats and port surfaces for any signs of scoring or uneven wear. Proper installation ensures that the sealing surfaces maintain air-tight integration under high pressure. It is recommended to check all mounting bolts and gasket surfaces during replacement to prevent air leaks within the braking system.

Selection guidance

Selecting the correct head is essential as variations in compressor architecture—such as single-cylinder or twin-cylinder configurations—require specific dimensions to ensure proper fitment and performance.