This service bulletin provides comprehensive instructions for replacing bearing spacers on ConMet PreSet Drive Hubs, specifically model 35-30. The bulletin is applicable to 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, Coronado, Business Class M2, Cascadia, and 108SD/114SD models. The detailed instructions within this bulletin will guide technicians through the proper removal and installation of the bearing spacers, ensuring a safe and efficient repair process.

## Bearing Spacer Replacement for ConMet PreSet Drive Hubs: Keeping Freightliner Trucks Rolling The ConMet PreSet Drive Hub is a critical component in the drivetrain of various Freightliner truck models, including the FLA, FLB, FLD, Business Class, FLC 112, Century Class, Argosy, Cargo, Columbia, Coronado, Business Class M2, Cascadia, and 108SD/114SD. These hubs are designed for durability and reliable performance, but like any mechanical part, they can wear down over time. The bearing spacers within the hub are particularly susceptible to wear, as they are responsible for maintaining the correct spacing between the hub's bearings. When these spacers become worn, the bearings can lose their alignment, leading to premature wear, increased noise, and potential failure. Replacing worn bearing spacers with high-quality alternatives is essential for maintaining the integrity of the ConMet PreSet Drive Hub and ensuring optimal performance and longevity for your Freightliner truck. These spacers are often manufactured from durable materials like steel or bronze and are available in different sizes and thicknesses to match your specific hub model. By ensuring the proper spacing between the hub's bearings, you can prevent premature wear, reduce noise levels, and maintain the smooth and efficient operation of your truck's drivetrain. This replacement is a proactive measure that can extend the lifespan of your hub, ultimately saving you time, money, and potential downtime on the road.