20547525 Volvo NH12 Twin Cylinder Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor serves as a critical component in the air brake system of heavy commercial vehicles, generating the necessary compressed air through two piston-cylinder assemblies. This design ensures high air output and efficient reservoir filling to maintain consistent braking performance under heavy loads.

Vehicle compatibility and engine fitment

This specific unit is designed for compatibility with Volvo NH12 models, including the NH 12/340, NH 12/380, NH 12/420, and NH 12/460 variants. It functions within the engine-driven pneumatic system to support the braking and pneumatic requirements of the vehicle.

Technical specifications and cooling

The assembly features a water-cooled design with a water-cooled valve plate to manage thermal loads effectively. Technical specifications include an air inlet port of Ø35, an air outlet port of M26x1.5, and water inlet/outlet ports of M16x1.5. The unit weighs approximately 20.8 KG and includes an ESS feature for enhanced system reliability.

Installation and maintenance guidance

For optimal performance, technicians should ensure the water cooling lines are free of obstructions and check all port connections during installation. Regular inspection of the valve plate and unloader port is recommended to prevent pressure drops in the pneumatic circuit.

OE cross-reference

1300 010 001 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20547525.