The defining structural distinction is the superstructure rotation capability. Front-end loaders operate with a fixed, forward-facing boom and bucket and cannot rotate their working attachment through a full circle. Machines with a superstructure that rotates 360 degrees — regardless of whether they also have a front bucket — classify under the revolving excavator heading. Importers of combination or multi-function machines should obtain a binding ruling if the rotation capability is ambiguous.

Self-propelled front-end loaders imported from China have been subject to Section 301 tariffs. The applicable rate depends on the specific HTS 10-digit subheading. Importers should verify current Section 301 list coverage and any granted exclusions with a licensed customs broker, as the list of covered products and exclusion status can change.