4069825 Compatible ISM Single Cylinder Compressor

What does a single cylinder compressor do?

This single cylinder compressor serves as a critical component in the pneumatic system of heavy commercial vehicles, converting engine power into compressed air for the braking system. Designed with high-strength components, this unit features a water-cooled design to maintain optimal operating temperatures during sustained heavy-duty use. The through-drive configuration ensures efficient mechanical coupling with the engine.

Engine compatibility and fitment

This component is compatible with Cummins engines, specifically the ISM, M11, N14, and QSM11 series. By maintaining stable pressure levels, it supports the air processing unit and subsequent air tanks in various heavy commercial vehicle applications. This ensures consistent pneumatic performance across different operating environments.

Installation and maintenance guidance

For proper installation and maintenance, technicians should verify the water inlet and outlet connections, which utilize 3/4" - 16 UNF ports. It is essential to check the M10x1 air unloader port and the Ø25 air inlet port during routine inspections to prevent system leaks. Regular monitoring of the water-cooled valve plate ensures long-term reliability.

Troubleshooting and system inspection

When troubleshooting air pressure issues, inspect the compressor's ability to maintain its 318cm³ swept volume output. If pressure drops are detected, evaluate the integrity of the water cooling circuit to prevent overheating of the single piston assembly.

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.