Cummins 531943300 Turbo Oil Supply Tube

The Cummins 531943300 is a turbocharger oil supply tube designed to deliver pressurized engine oil to the turbocharger bearing housing. It is constructed from high-temperature resistant steel tubing with flared or threaded end fittings to ensure a leak-free seal under high pressure and thermal cycling conditions. This component is a critical part of the engine lubrication system, preventing turbocharger bearing starvation and failure. It is calibrated for the specific routing and connection points of the Cummins 6ISBE (ISB 6.7L) engine platform as installed in Dongfeng Tianjin and Tianlong series medium-duty commercial vehicles. Installation requires new sealing washers or O-rings at connection points to maintain system integrity.