57RS300781 BMC Single Cylinder, Air Compressor

This single cylinder air compressor is engineered to provide reliable pneumatic pressure for heavy commercial vehicle systems. It features a high-strength component design with a water-cooled mechanism to ensure stable operation under demanding thermal conditions. The unit is built to maintain consistent air output for critical brake system functions.

57RS300781 is the OE equivalent of the BMC 57RS300781 single cylinder air compressor used in BMC heavy commercial vehicles. This component features a cylinder bore of Ø80.00 and a stroke of 45mm, ensuring precise volumetric displacement of 225cm³. The integration of a water-cooled valve plate and specific inlet/outlet ports guarantees seamless system-level compatibility.

Workshop technicians should note the specific port dimensions for error-free installation: the air inlet is M26x1,5 and the air outlet is M22x1,. The water cooling ports are both M16x1,5 to facilitate efficient thermal regulation. Regular inspection of the through-drive and unloader port (M10x1) is recommended during standard service intervals to maintain optimal pneumatic performance within the braking system.