Which of the following is NOT one of the four configurations for the bucket?

The bucket configurations for a backhoe loader typically include the scraper, loader, and clamshell types. Each configuration serves a distinct function: the scraper is used for leveling and grading, the loader is ideal for lifting and moving materials, and the clamshell is designed for digging and scooping up materials in a more controlled manner.

The excavator, while a common piece of heavy machinery used for digging, is not classified as a configuration for the bucket on a backhoe loader. Instead, excavators have their own distinct designs and buckets which focus primarily on digging capabilities rather than the multi-functional uses that backhoe loader buckets provide. Recognizing the differences in bucket configurations helps in understanding the various applications and efficiencies of each type of equipment.