Self-propelled work machine

A self-propelled work machine, such as an excavator, comprising an undercarriage equipped with wheels or track chains, a top carriage supported onto the undercarriage for 360° rotation about a vertical axis, and a first articulating boom pivotably attached to the top carriage and having a first implement attached to the free end thereof, and wherein the undercarriage is fitted with a mounting and pivoting adapter (hereinafter adapter) to which a second articulating boom having a second implement attached to the free end thereof is attached, and the adapter comprises a mounting part attached to the undercarriage and a pivoting part attached to the mounting part such that it is pivotable about a vertical axis and having said second articulating boom attached thereto such that it is pivotable about a horizontal axis, characterized in that the axis line of the vertical axis of the adapter is at a distance from the undercarriage in the direction of travel of the work machine and the pivoting part along with the articulating boom is able to pivot at least 120° about the vertical axis of the adapter, and that the work machine is equipped with a programmable processor programmed to automatically control predetermined movements of the second articulating boom and/or the second implement, and/or wherein the adapter is equipped with a valve housing with hydraulic valves that can be remotely controlled by an electronic control unit, and with which the movements of the second articulating boom and/or the second implement can be remotely controlled.