2500 150 001 Compressor Twin Cylinder — Cummins Equivalent

What is a Twin Cylinder Compressor?

A Twin Cylinder Compressor is an engine-driven unit in the air brake system of heavy commercial vehicles that generates compressed air using two piston-cylinder assemblies.

Technical specifications and performance

This water-cooled unit is designed to meet the high air demand of heavy-duty applications, such as multi-axle tractor units and buses. It features a Ø75.00 mm cylinder bore, a 56 mm stroke, and a swept volume of 495cm³. The assembly includes a water-cooled valve plate and an ESS feature to ensure thermal stability and efficient operation under sustained loads.

Vehicle and engine compatibility

This compressor is compatible with Cummins ISC and ISL9 engines, making it suitable for various vehicles including Freightliner M2, Kenworth T370, Peterbilt 337, and International 4400 models. It is also frequently used in buses from Thomas Built Buses, Blue Bird, and New Flyer. Always verify the mounting interface and port sizes, such as the M27x2 outlet and 3/4-16 UNF water ports, to ensure correct fitment.

Maintenance and installation guidance

To maintain optimal performance, technicians should regularly inspect the water inlet and outlet connections. Proper maintenance of the cooling circuit ensures the unit operates within safe temperature limits during heavy commercial service.

OE cross-reference

2500 150 001 (Twin Cylinder Compressor) is the equivalent of the Cummins and WABCO OE numbers. This part directly replaces Cummins OE number 3976374. It also replaces WABCO OE number 9115165000.