20478166 Volvo FH12 D12D Compressor

What does a single cylinder compressor do?

This single cylinder air compressor serves as a critical component within the pneumatic braking system of heavy commercial vehicles. Designed for high-pressure reliability, it ensures consistent air supply for braking and auxiliary pneumatic functions. The unit is constructed with high-strength components to withstand demanding operational cycles in heavy-duty environments.

Vehicle and engine compatibility

This specific model is engineered for Volvo FH12 trucks equipped with D12D engines. It functions as an equivalent replacement for original equipment, maintaining exact fitment within the engine's air management system. The unit features a through drive design and is optimized for integration with existing Volvo engine configurations.

Installation and maintenance

Installation requires attention to the water cooling ports (M16x1,5) and the air outlet port (M26x1,5) to ensure proper sealing. Technicians should verify the M12x1,5 unloader port connection during assembly. Regular inspection of the water-cooled valve plate and inlet ports is recommended to prevent system pressure drops.

System performance and checks

For optimal performance, ensure that the cooling system provides adequate flow to the water inlet to maintain stable operating temperatures during long-haul transport.

OE cross-reference

1300 025 001 (Single Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20478166.