8500006 SP1 Compatible Twin Cylinder Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor serves as a critical component within the air brake system, providing the necessary compressed air for braking and pneumatic functions. Built with heavy-duty grade materials, it utilizes two piston-cylinder assemblies to deliver higher air output and faster reservoir filling compared to single-cylinder alternatives. This specific model is designed for water-cooled applications, ensuring stable thermal management during continuous operation.

Vehicle compatibility and engine fitment

This unit is specifically engineered for Volvo NH12 vehicles equipped with D12A engines. It features a through-drive design and is compatible with Volvo OE specifications to ensure seamless integration into the existing pneumatic architecture of the engine. The assembly includes a water-cooled valve plate and ESS feature compatibility to maintain system integrity.

Installation and maintenance guidance

For professional installation, technicians should verify the water inlet and outlet port configurations (M16x1,5) and the air outlet port (M26x1,5). Given the 23 KG weight and specific Ø29 air inlet port, it is essential to ensure all mounting points and hose connections are secure. Maintaining correct cooling flow is vital for the longevity of the internal components.

Maintenance and troubleshooting

Regular inspection of the unloader port (M22x1,5) and checking for any leaks in the water circuit can prevent system pressure drops. When replacing an old unit, always match the mounting flange and drive gear configuration to ensure correct timing and fitment within the engine block.

OE cross-reference

1300 050 002 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 8500006SP1.