ZB4187 Knorr-Bremse Compatible Compressor Cylinder Head

What does a compressor cylinder head do?

This compressor cylinder head acts as the cast service component that sits on top of an air brake compressor's cylinder block, sealing the compression chamber from above. It is a vital part for workshop technicians looking to rebuild a compressor in place rather than replacing the entire unit. By replacing only the head, maintenance costs are reduced while restoring the efficiency of the pneumatic system.

Compatibility and system function

This component is designed to function within Knorr-Bremse systems and other heavy commercial vehicle air brake assemblies. It plays a crucial role in governing both the air output and the running temperature of the compressor through its internal air passages and valve seats. The design ensures the unit maintains pressure even under sustained high loads.

Installation and maintenance guidance

When performing installation, technicians should ensure all surfaces are clean and check that the valve seats are properly aligned within the head. Proper mounting is essential to maintain a seal within the compression chamber and prevent pressure leaks. Consult your authorized distributor for specific fitment guidance.

Selection for compressor rebuilding

The cylinder head is a primary component in the compressor repair process, often replaced alongside valve plates or gaskets to ensure long-term reliability in heavy duty applications.

OE cross-reference

11 13 50 (Compressor Cylinder Head) is the equivalent of the Knorr-Bremse OE number. This part directly replaces Knorr-Bremse OE number ZB4187.