20478151 SP1 Twin Cylinder Compressor for Volvo B9TL

What does a twin cylinder compressor do?

This twin cylinder compressor is designed to meet the high air consumption demands of heavy commercial vehicle brake systems. Utilizing a water-cooled configuration, the unit connects directly to the engine's coolant circuit to maintain thermal stability during sustained high-demand operations. This prevents overheating and ensures consistent pressure delivery for critical pneumatic systems.

Compatible vehicles and engines

This specific model is compatible with Volvo B9TL trucks equipped with D9B engines. It features a through-drive design with a gear connection, ensuring high torque transmission without the risk of belt slip. The technical architecture includes an Ø85.00 mm cylinder bore, a 62 mm stroke, and an M26x1,5 air outlet port, making it a precise fit for the designated application.

Installation and maintenance

For professional installation, technicians should verify that the water inlet and outlet ports (M16x1,5) align with the existing engine coolant lines. It is essential to check that the through-drive mounting interface matches the original component exactly to ensure proper alignment and prevent premature wear of the internal piston and ring assemblies.

Service life and maintenance

To maximize service life, regular inspection of the intake filter and the air dryer system is recommended. Maintaining clean air and coolant flow is vital for the longevity of any water-cooled compressor assembly in heavy-duty service.

OE cross-reference

1300 180 002 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20478151SP1.