8500006 SP1 Volvo FL12 TD123 Twin Cylinder Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor is a critical component in the pneumatic braking system, engineered to provide consistent air pressure for heavy commercial vehicle operations. By utilizing two piston-cylinder assemblies, this unit delivers high air output to ensure reservoirs are filled efficiently, supporting the demanding requirements of heavy-duty braking and pneumatic systems.

Compatibility with Volvo FL12 engines

This specific model is designed for use in Volvo FL12 trucks equipped with TD123 engines. It features a water-cooled design to maintain thermal stability during sustained high-demand operation, an 88.00 mm cylinder bore, and an M26x1,5 air outlet port. The unit is gear-driven via a through-drive mechanism to ensure reliable torque transmission without risk of slip.

Installation and maintenance guidance

For successful installation, technicians must ensure that the water inlet and outlet ports (M16x1,5) align perfectly with the engine's coolant circuit. Because cooling methods and mounting interfaces vary significantly between engine variants, it is essential to verify that the drive gear and port locations match the removed unit exactly.

Troubleshooting and selection

Regular inspection of the water-cooled valve plate and air inlet ports (Ø29) is recommended to prevent pressure drops or overheating in the pneumatic circuit.

OE cross-reference

1300 050 002 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 8500006SP1.