Any of several types of self-propelled multibucket loaders that are considered suitable for miscellaneous light excavating work. These loaders dig their own path, and to do this, have various means of gathering the material to a point where it will be picked up by the buckets as they pass over the lower tumbler. While these loaders are usually used for reclaiming from stockpiles, they can, under favorable conditions, excavate from deposits. These machines always are mounted on crawler treads.