A4123520270SP1 Mercedes-Benz Twin Cylinder Air Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor serves as a critical engine-driven component within the air brake system of heavy commercial vehicles. By utilizing two piston-cylinder assemblies, it generates the necessary compressed air pressure required for reliable brake system operation and reservoir charging. The unit is engineered with high-strength components to withstand the rigorous thermal and mechanical stresses found in heavy-duty environments.

Vehicle compatibility and engine fitment

This specific model is compatible with Mercedes-Benz vehicles. It is designed to provide consistent air output, making it suitable for heavy-duty applications where rapid pressure recovery is essential. The unit features a water-cooled design with a water inlet port of M16x1,5 and an outlet port of M16x1,5 to manage operating temperatures effectively.

Installation and maintenance guidance

For professional installation, technicians should verify the M26x1,5 air inlet and outlet ports along with the M12x1,5 unloader port. This through-drive compressor is built with a water-cooled valve plate to enhance durability. Ensuring correct torque on all connections is vital for maintaining system integrity and preventing air leaks.

System performance and selection

Regular inspection of the water cooling lines and air ports is recommended to prevent performance degradation in the braking system.

OE cross-reference

1100 020 021 (Twin Cylinder Compressor) is the equivalent of the Mercedes-Benz OE number. This part directly replaces Mercedes-Benz OE number A4123520270SP1.