What tool is commonly used to set the carrier bearing preload on an axle assembly?

The commonly used tool for setting the carrier bearing preload on an axle assembly is a spring scale. This tool measures the amount of force being applied, which is essential in ensuring that the bearings are properly preloaded to manufacturer specifications. Proper preload is crucial for ensuring that the bearings operate smoothly and have a long service life, as it minimizes the risk of excessive movement and wear.

When adjusting the carrier bearing preload, the technician typically pulls on the bearing until a certain amount of force, as indicated on the spring scale, is achieved. This allows for a precise measurement of the preload and ensures that the assembly operates correctly under load.

Other tools mentioned, like a spanner wrench, are primarily used for tightening or loosening nuts and bolts, while a torque wrench measures the rotational force applied during fastening. A dial indicator is often employed to measure precise movements or gaps but does not provide the necessary information about the force being applied to ensure correct bearing preload.