81128514 SP1 Twin Cylinder Air Compressor — Volvo FL12

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 compressed air required for braking and pneumatic functions. By utilizing two piston-cylinder assemblies, this unit delivers a higher air output compared to single-cylinder alternatives, ensuring faster reservoir replenishment and stable pressure delivery under demanding conditions.

Compatibility with Volvo FL12 engines

This specific unit is designed for Volvo FL12 trucks equipped with TD122 engines. It features a water-cooled design to maintain thermal stability during long hauls, a 608cm³ swept volume, and an Ø88.00 mm cylinder bore. The assembly includes an ESS feature and a water-cooled valve plate to enhance operational durability in heavy-duty environments.

Installation and technical specifications

For successful installation, technicians should verify that the water inlet/outlet ports (M16x1,5) and the air outlet port (M26x1,5) match the existing vehicle configuration. Since this is a through-drive unit with gear engagement, ensure the drive gear and mounting interface align perfectly with the engine requirements to prevent mechanical slip or vibration.

Selection and replacement guidance

When replacing an existing unit, it is vital to match the mounting flange and port locations exactly. Even within the same vehicle model, different engine variants may require different compressor specifications. Consult your authorized distributor to confirm exact fitment.

OE cross-reference

1300 050 006 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 81128514SP1.