20842990 SP1 Twin Cylinder Compressor for Volvo B9R

What does a twin cylinder compressor do?

This twin cylinder compressor serves as a critical component in the pneumatic braking system of heavy commercial vehicles. Designed to provide consistent air pressure, it utilizes a water-cooled configuration to maintain thermal stability during intensive operation. The unit features a high-strength construction suitable for the demanding environments encountered by fleet managers and workshop technicians.

Compatibility and engine fitment

This specific model is engineered for Volvo B9R trucks equipped with D9B engines. It is characterized by its Ø85.00 mm cylinder bore, 62 mm stroke, and a 704cm³ swept volume. The unit includes an M26x1,5 air outlet port and an M16x1,5 unloader port, ensuring precise pressure regulation within the braking circuit.

Installation and maintenance

For professional installation, technicians should verify that the water inlet and outlet ports (M16x1,5) align with the engine's coolant circuit. Proper mounting of the gear drive and ensuring all connections are secure is vital for long-term reliability. Maintenance should focus on monitoring the cooling flow and checking the integrity of the valve plate.

Selection guidance

When replacing this unit, it is essential to match the technical specifications of the removed component exactly. Verify that the cooling method and port dimensions are identical to the original part to prevent system leaks or pressure drops.

OE cross-reference

1300 180 002 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20842990SP1.