What is the correct way to adjust tapered roller bearings?

The correct method to adjust tapered roller bearings involves torquing them to a specified value and then backing off to establish the correct end-play. This two-step process is fundamental because tapered roller bearings require a specific amount of end-play to function correctly, ensuring that they can support both axial and radial loads while preventing excessive preload, which can cause premature bearing failure.

By first torquing to OEM specifications, you ensure that the bearing is seated correctly. Backing off allows for the proper adjustment of any clearance, providing the necessary end-play within the manufacturer's specified limits. This adjustment method helps to enhance the performance and longevity of the bearings, which is critical in suspension and steering systems where accurate alignment and load distribution are essential for safety and handling.

The other options do not adequately address the requirements for proper bearing adjustment, such as only torquing to OEM specifications without the subsequent backing off, which could leave the bearings under or over-loaded, or specifying a minimum amount of end-play without consideration of manufacturer specifications.