25 03 10 Cylinder Head Compatible with Cummins

What does a compressor cylinder head do?

A compressor cylinder head is the critical cast component that seals the top of an air brake compressor's cylinder block while housing the inlet and discharge valve seats. It is responsible for maintaining internal pressure without leakage and routing compressed air through the discharge port, while also managing compression heat during operation.

Vehicle and engine compatibility

This part is compatible with various heavy commercial vehicle applications, including Ford Trucks, Kenworth, Freightliner, and International. It is specifically designed to work with Cummins engines such as the ISM, N14, ISL, and ISC series found in diverse models from Peterbilt to Volvo. The component ensures reliable performance across heavy-duty truck and bus fleets.

Installation and maintenance

Technicians should verify the specific compressor architecture before installation, as designs vary between single-cylinder and twin-cylinder configurations. When replacing this part, ensure that the discharge port threads and bolt hole patterns match the original unit exactly to prevent air leaks or improper mounting. Consult your authorized distributor for fitment guidance.

Troubleshooting

Proper maintenance of the cylinder head helps prevent common issues like pressure loss or overheating in the pneumatic system.

OE cross-reference

25 03 10 (Compressor Cylinder Head) is the equivalent of the Cummins and WABCO OE numbers. This part directly replaces Cummins OE number 4936226. It also replaces WABCO OE number 9111539202.