1100 255 020 Mercedes-Benz Twin Cylinder Air Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor is an engine-driven component within the air brake system of heavy commercial vehicles, utilizing two piston-cylinder assemblies to generate compressed air. By producing two compression strokes per crankshaft revolution, this unit delivers a higher air output than single-cylinder alternatives, ensuring faster reservoir filling for demanding applications.

Technical specifications and compatibility

This specific model is compatible with Mercedes-Benz vehicles. It features a water-cooled configuration with a water-cooled valve plate to manage thermal loads during operation. Technical specifications include a Ø85.00 mm cylinder bore, a 56 mm stroke, and a 636cm³ swept volume. The unit is equipped with M26x1,5 inlet and outlet ports, an M12x1,5 unloader port, and M16x1,5 water ports.

Installation and maintenance guidance

For professional installation, technicians should verify that the through drive configuration and port locations match the existing setup. When replacing an existing unit, it is essential to ensure the mounting interface and cooling connections are identical to avoid system leaks or pressure drops. Proper installation ensures optimal performance of the vehicle's pneumatic braking system.

Service and troubleshooting

Regular inspection of the water inlet and outlet ports is recommended to prevent blockages. This compressor is engineered with high-strength components to withstand the rigorous duty cycles required in heavy commercial service environments.

OE cross-reference

1100 255 020 (Twin Cylinder Compressor) is the equivalent of the Mercedes-Benz and WABCO OE numbers. This part directly replaces Mercedes-Benz OE number 4571306915SP1. It also replaces WABCO OE number 9125102000SP1.