Bucket Wheel Excavators (BWE) are continuous cutting machines for soft to semi hard materials like clay, sand, gravel, marl and their blending as well as lignite and hard coal. The characteristic parts of a Bucket Wheel Excavator are the cutting wheel with buckets, the wheel boom, the superstruc-ture with counterweight boom, the sub-structure, the undercarriage with crawler tracks and a transfer boom to the bench conveyor (or a connecting bridge to the loading unit). All main parts are designed to meet the demands of the project re-garding optimization, standardization and maintenance.