Knorr-Bremse 5010339859 Air Brake Compressor Assembly

The Knorr-Bremse LP4851 is a twin-cylinder, engine-driven air brake compressor designed for heavy-duty commercial vehicle pneumatic braking systems. It functions as the primary air supply unit, compressing atmospheric air to the required operating pressure for brake actuation and auxiliary pneumatic functions. The unit features a flange-mounted drive configuration compatible with specific Renault truck engine power take-off points. Constructed with aluminum alloy cylinder block and head for optimized heat dissipation and reduced mass, the compressor integrates a cylinder head assembly with reed valves and an unloader mechanism governed by the vehicle's air dryer governor. It serves as a direct replacement for Renault Trucks OEM numbers 5010339859, 7485003211, 5001867509, and 5010323293. Maintenance intervals typically require inspection of the cylinder head gasket, piston rings, and unloader valve assembly using dedicated repair kits.