This Service Bulletin provides essential information regarding the DEF Tank Coolant Valve O-Ring Kit, part number sb4934. It covers a wide range of Freightliner trucks, including the FLA COE, FLB COE, FLD Conventional, Business Class, FLC 112 Conventional, Century Class Conventional, Argosy COE, Cargo, Columbia, 122SD and Coronado, Business Class M2, Cascadia, and 108SD/114SD models. The bulletin details the proper procedures for replacing the O-rings in the DEF Tank Coolant Valve, ensuring optimal performance and preventing potential leaks.

The DEF Tank Coolant Valve O Ring Kit sb4934 is an essential component for maintaining the proper function of the Selective Catalytic Reduction (SCR) system in a range of Freightliner truck models. This kit is designed to replace worn or damaged O-rings in the coolant valve located on the DEF tank. The coolant valve plays a crucial role in regulating the temperature of the DEF fluid, ensuring optimal performance of the SCR system. By preventing leaks and maintaining a tight seal, the O-ring kit ensures that the DEF fluid remains at the correct temperature, maximizing its effectiveness in reducing harmful emissions. The kit includes high-quality O-rings specifically engineered for compatibility with Freightliner trucks, offering reliable performance and durability. This DEF Tank Coolant Valve O Ring Kit is compatible with a wide variety of Freightliner truck models, including the FLA COE, FLB COE, FLD Conventional, Business Class, FLC 112 Conventional, Century Class Conventional, Argosy COE, Cargo, Columbia, 122SD, Coronado, Business Class M2, Cascadia, 108SD, and 114SD. The kit's versatility ensures that it is a valuable asset for owners and operators of these trucks, providing a convenient and cost-effective solution for maintaining the SCR system's functionality. By replacing worn O-rings with this kit, truck owners can prevent potential DEF leaks, preserve the integrity of the SCR system, and ensure optimal performance and longevity of their Freightliner trucks. Regularly replacing the O-rings in the coolant valve also helps to maintain compliance with emission standards and contribute to a cleaner environment.