20775224 Volvo B9R D9B Twin Cylinder Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor is a vital component of the air brake system, engineered to provide high-capacity air generation for demanding heavy commercial vehicle applications. By utilizing a dual-cylinder configuration, it ensures a faster and more consistent air supply compared to single-cylinder alternatives, which is essential for maintaining optimal pneumatic pressure during sustained heavy-duty operations.

Compatibility and engine fitment

This specific unit is designed for use in Volvo B9R trucks equipped with D9B engines. It features a water-cooled design to prevent overheating by integrating directly into the engine's cooling circuit, making it ideal for long-haul transport where thermal stability is critical. The assembly includes an ESS feature and a water-cooled valve plate to enhance durability and efficiency under high pressure.

Installation and technical specifications

When performing installation or maintenance, technicians should verify the port specifications: the air inlet port measures Ø35, while the air outlet port is M26x1,5. The unit also includes an M12x1,5 air unloader port and M16x1,5 water inlet and outlet ports. Ensuring these connections are correctly seated is vital for preventing pressure leaks and maintaining system integrity.

Maintenance considerations

Consult your authorized distributor to ensure exact fitment with your current pneumatic configuration.

OE cross-reference

1300 185 001 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20775224.