20478151 Compatible Compressor for Volvo FM9

What does a twin cylinder compressor do?

This twin cylinder compressor serves as a critical component within the air brake system, providing the necessary air pressure for braking and pneumatic operations. Designed for heavy-duty performance, this water-cooled unit integrates into the engine cooling circuit to prevent overheating during sustained heavy-load operation, ensuring consistent performance in demanding environments.

Compatible vehicles and engines

This component is specifically designed to be compatible with Volvo FM9 trucks, including various configurations such as the FM 9/260, FM 9/340, and FM 9/380. It is engineered to meet the specific requirements of these heavy commercial vehicles, providing high-capacity air generation through its dual-cylinder architecture.

Installation and maintenance

The unit features a Ø85.00 mm cylinder bore and a 62 mm stroke, resulting in a swept volume of 704cm³. For installation, technicians should note the M26x1,5 air outlet port and the M16x1,5 ports for both the air unloader and water connections. Proper torque application on all threaded ports is essential to prevent leaks in the pneumatic circuit.

Troubleshooting and selection

Regular inspection of the water inlet and outlet ports is recommended to ensure optimal cooling efficiency. Maintaining clean coolant flow through the water-cooled valve plate helps prevent premature wear and ensures long-term reliability within the vehicle's air brake system.

OE cross-reference

1300 180 001 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20478151.