20775224 SP1 Twin Cylinder Compressor for Volvo B9R

What does a twin cylinder compressor do?

This twin cylinder compressor serves as a critical component in the air brake system of heavy commercial vehicles, providing the necessary compressed air through two piston-cylinder assemblies. Designed for high-demand applications, this water-cooled unit utilizes a Ø85.00 mm cylinder bore and a 62 mm stroke to deliver consistent air pressure, ensuring faster reservoir filling compared to single-cylinder alternatives.

Vehicle and engine compatibility

This specific unit is engineered for compatibility with Volvo B9R vehicles equipped with D9B engines. It features a water-cooled design to maintain thermal stability during long hauls and is compatible with Volvo OE systems. The gear-driven mechanism ensures high torque transmission without the risk of slip, making it suitable for demanding service environments.

Installation and maintenance guidance

For successful installation, technicians should verify that the water inlet and outlet ports (M16x1,5) align with the existing coolant circuit. The unit includes an ESS feature and a water-cooled valve plate to optimize performance. Ensure all connections, including the M26x1,5 air outlet port and M12x1,5 unloader port, are tightened to manufacturer specifications to prevent leaks.

Performance and selection

Maintaining regular checks on the cooling circuit and air ports is essential for preventing system failures. When replacing the unit, always compare the mounting flange and drive gear characteristics to ensure an exact match for the vehicle's specific configuration.

OE cross-reference

1300 185 002 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20775224SP1.