21521357 VOLVO Twin Cylinder, Air Compressor

The air compression system is a critical component for the pneumatic operations of heavy-duty vehicles. This high-strength component ensures consistent air pressure delivery within the braking and suspension systems, maintaining optimal performance under demanding industrial conditions.

The 21521357 is the OE equivalent of the VOLVO 21521357 air compressor used in VOLVO vehicles. This twin cylinder model features a cylinder bore of Ø85.00 and a stroke of 56 mm, designed to meet strict technical requirements for reliability. It is specifically engineered for high-duty cycles in heavy commercial vehicle applications.

Technicians should note the specific port dimensions during installation to ensure a precise fit. This unit features an M26x1,5 air outlet port and an M12x1,5 air unloader port. The water-cooled design with an M16x1,5 inlet and outlet ensures efficient thermal management during operation. Always verify the through-drive compatibility with the existing engine assembly.

Regular maintenance of the air compressor and its cooling system is essential to prevent pressure drops in the pneumatic circuit. Ensuring the water-cooled valve plate remains unobstructed will prolong the service life of the component.