20846000 Volvo B11R D11A Twin Cylinder Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor plays a critical role in the pneumatic air brake system by generating the necessary pressurized air required for braking and auxiliary functions. Built with high-strength components, it is designed to withstand the demanding thermal and pressure cycles found in heavy commercial vehicle applications.

Compatibility and engine fitment

This unit is specifically compatible with Volvo B11R trucks equipped with D11A engines. It features a water-cooled design to maintain optimal operating temperatures and includes an integrated ESS feature for enhanced system performance. The assembly includes a water-cooled valve plate to ensure long-term durability under high-load conditions.

Installation and technical guidance

Technicians should verify that all port connections match the existing installation, specifically the Ø35 air inlet, M26x1,5 air outlet, and M16x1,5 ports for water and unloading. The through-drive configuration and 22.5 KG weight are critical factors for correct mounting and alignment during replacement.

Maintenance considerations

Regular inspection of the water inlet and outlet ports is recommended to prevent scaling or blockages that could affect cooling efficiency.

OE cross-reference

1300 190 002 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20846000.