21353433 SP1 Compatible Volvo VHD D12 Compressor

What does a single cylinder compressor do?

This single cylinder air compressor serves as a vital component within the pneumatic braking system of heavy commercial vehicles. It is engineered to provide consistent air pressure required for reliable braking performance and system actuation. Constructed with high-strength components, this unit is designed to withstand the rigorous thermal and mechanical stresses encountered in heavy-duty service environments.

Compatible vehicles and engine fitment

This specific model is compatible with Volvo VHD trucks equipped with D12 engines. It features a water-cooled design to manage operating temperatures effectively, ensuring longevity under continuous load. The unit includes an ESS feature and a water-cooled valve plate to maintain optimal pneumatic efficiency within the vehicle's air system.

Installation and maintenance guidance

For correct installation, technicians should verify the cooling connections via the M16x1,5 water inlet and outlet ports. The compressor utilizes an M26x1,5 air outlet port and an M12x1,5 unloader port. Proper alignment during mounting ensures the through-drive mechanism functions correctly without premature wear.

System maintenance and checks

Regular inspection of the air inlet port (Ø35) and cooling lines is recommended to prevent system contamination or overheating. Maintaining clean air intake and adequate coolant flow is essential for preserving the integrity of the internal valve plate and piston group.

OE cross-reference

1300 025 004 (Single Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21353433SP1.