Abstract
The machines with bucket wheels used to remove and to put coal in deposits are intended to dump and remove coal from quarries and power station deposits. The paper presents how to determine the gravity center of a machine with bucket wheels used to remove coal from deposits, by tensiometric measurements, in various positions of the arm of the bucket rotor (wheel). The machine with bucket wheel used for taking out from deposits is within Arcelor Mittal Galați. The measurements have been made in limit positions of the arm of the bucket wheel, horizontally and vertically, respectively, and have been made because of determining an additional weight that should be added in the ballast box of the equilibrium arm, if appropriate.