20569928 SP1 Volvo NH12 D12C Twin Cylinder Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor serves as a critical component in the pneumatic braking system, ensuring consistent air pressure for heavy commercial vehicle safety. Built with high-strength components, it is specifically designed to handle the rigorous thermal and mechanical loads found in heavy-duty engine environments.

Compatibility and technical specifications

This unit is compatible with Volvo NH12 trucks equipped with D12C engines. It features a water-cooled design with a swept volume of 704cm³, a Ø85.00 mm cylinder bore, and a 62 mm stroke. The assembly includes an M26x1.5 air outlet port and an M16x1.5 unloader port to maintain system stability.

Installation and maintenance guidance

For proper installation, technicians should verify that the water inlet and outlet ports (M16x1.5) match the existing cooling lines. Ensure the through-drive interface and gear configuration are inspected before mounting to prevent drive-end mismatch during operation.

Troubleshooting and selection

When replacing this unit, it is essential to match the technical specifications of the removed component, particularly the cylinder diameter and cooling type, to ensure seamless integration with the existing air brake system.

OE cross-reference

1300 180 002 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20569928SP1.