4059825 Cummins M11 Compatible Air Compressor

What does an air compressor do?

This single cylinder air brake compressor serves as a critical component in the pneumatic system of heavy commercial vehicles, converting mechanical energy into compressed air. Designed with high-strength components, it ensures consistent air pressure delivery to the air processing unit and tanks. This specific model is water-cooled and features an integrated ESS feature to maintain optimal operating temperatures during intensive service cycles.

Engine compatibility and fitment

This compressor is compatible with Cummins M11, N14, ISM, and QSM11 engines. It is engineered to meet the rigorous demands of heavy commercial vehicle applications, providing a reliable replacement for original equipment components in various engine configurations.

Installation and maintenance

For proper installation, technicians should verify the water inlet and outlet ports (3/4" - 16 UNF) and ensure the air unloader port (M10x1) is correctly aligned. Given its 17.4 KG weight and through-drive design, secure mounting is essential to prevent vibration-related issues in the pneumatic circuit.

Maintenance and troubleshooting

Regular inspection of the water-cooled valve plate and air ports is recommended to prevent system pressure drops. Maintaining clean air intake via the Ø25 inlet port helps prevent premature wear in the single-cylinder housing.

OE cross-reference

2500 030 003 (Single Cylinder Compressor) is the equivalent of the Cummins OE number. This part directly replaces Cummins OE number 4059825.