8112851 SP1 Volvo Compatible Twin Cylinder Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor is an essential component of the pneumatic braking system, engineered to provide a high volume of compressed air through two piston-cylinder assemblies. By utilizing a dual-cylinder design, the unit ensures faster reservoir filling and more consistent air pressure compared to single-cylinder alternatives, making it vital for heavy-duty braking performance.

Vehicle and engine compatibility

This specific model is designed for Volvo FL12 vehicles equipped with TD123 engines. It features a water-cooling configuration to maintain thermal stability during sustained high-demand operation. The unit includes an ESS feature and is designed for through-drive applications to ensure reliable torque transmission within the engine assembly.

Technical specifications and installation

For professional technicians, verifying the mounting interface is critical. This unit features an Ø88.00 mm cylinder bore, a 50 mm stroke, and a swept volume of 608cm³. The air outlet port is M26x1.5, while the water inlet and outlet ports are M16x1.5. Always ensure that the water cooling connections and gear drive alignment match the existing engine configuration during installation.

Maintenance and troubleshooting

To maintain optimal performance, technicians should regularly inspect the water cooling lines and check for any leaks at the M26x1.5 outlet or M22x1.5 unloader port. Proper maintenance of the cooling circuit helps prevent overheating and ensures the longevity of the internal valve plate.

OE cross-reference

1300 050 006 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 8112851SP1.