21521357 Volvo VNL D13 Twin Cylinder Compressor

What does a twin cylinder compressor do?

This twin cylinder compressor plays a critical role in the pneumatic braking system of heavy commercial vehicles by converting mechanical energy into compressed air. Built with high-strength components, it ensures consistent air pressure delivery required for safe braking operations and auxiliary pneumatic functions. The unit features a water-cooled design to manage operating temperatures effectively during continuous service.

Vehicle compatibility and engine fitment

This specific model is compatible with Volvo VNL trucks equipped with D13 engines. It is engineered to meet the rigorous demands of the heavy commercial vehicle sector, ensuring seamless integration within the engine's air management system. The unit includes an integrated ESS feature and water-cooled valve plates for enhanced durability.

Installation and maintenance guidance

Installation and maintenance should be performed by a workshop technician to ensure correct alignment of the M26x1,5 air outlet port and the M16x1,5 water ports. Regular inspection of the Ø35 air inlet and unloader ports is recommended to prevent contamination in the pneumatic circuit. Check the compatibility list to ensure precise fitment.

System reliability and selection

Proper selection of this compressor ensures stable air supply for the entire braking system, preventing pressure drops during heavy-duty cycles.

OE cross-reference

1300 240 002 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21521357.