20850846 Volvo FH12 D12D Twin Cylinder Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor serves as a critical component within the pneumatic braking system, providing the necessary air pressure for heavy commercial vehicle operations. Built with high-strength components, it ensures consistent performance under demanding service conditions while maintaining system integrity through efficient air delivery.

Compatibility and technical specifications

This specific unit is engineered for Volvo FH12 trucks utilizing the D12D engine. It features a water-cooled configuration with a swept volume of 704cm³ and a cylinder bore of Ø85.00 mm. The design includes an integrated ESS feature and a water-cooled valve plate to manage thermal loads effectively during continuous operation.

Installation and maintenance guidance

For proper installation, technicians should verify the M26x1,5 air outlet port and the M16x1,5 water inlet/outlet ports. Ensuring all connections are secure and checking the through drive alignment is essential for preventing leaks or premature wear in the pneumatic circuit.

Maintenance and troubleshooting

Regular inspection of the air unloader port and cooling lines helps prevent system failures. Maintaining correct coolant flow through the M16x1,5 ports is vital for the longevity of this water-cooled component.

OE cross-reference

1300 180 003 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20850846.