4069825 Cummins QSM11 Compressor Equivalent

What does a single cylinder compressor do?

This single cylinder air brake compressor is a piston-type component that generates the compressed air required for the braking systems in heavy commercial vehicles. By taking drive from the engine, it compresses intake air and directs it to the air processing unit, ensuring consistent pressure for the entire pneumatic circuit. This unit is constructed with heavy-duty grade materials to withstand high-pressure operating conditions.

Engine compatibility and fitment

This specific model is compatible with Cummins engines including M11, N14, ISM, and QSM11. It is designed to meet the rigorous demands of heavy commercial vehicle applications, providing stable air supply for essential pneumatic functions. Check the compatibility list for exact fitment.

Installation and maintenance guidance

The unit features a water-cooled design with 3/4" - 16 UNF water inlet and outlet ports to prevent overheating during continuous operation. Technical specifications include a 56 mm stroke, an M27x2 air outlet port, and an M25 air inlet port. For maintenance, technicians should regularly inspect the water cooling lines and ensure the ESS feature is functioning correctly to maintain optimal system pressure.

Operational reliability

Proper installation ensures that the air delivery remains stable across various engine RPM ranges. Selecting a high-strength component helps prevent sudden pressure drops in the braking system, maintaining safety for fleet operators and technicians.

OE cross-reference

2500 030 003 (Single Cylinder Compressor) is the equivalent of the Cummins OE number. This part directly replaces Cummins OE number 4069825.