An autonomously electrically driven working machine for carrying a load comprising: - a working machine frame; - a dump body comprising: -- an open load receiving area outwardly delimited by a load receiving area circumference; -- a load dumping end portion pivotably attached to said working machine frame; -- a load supporting end portion arranged at a distance from said load dumping end portion; said working machine frame having a first end portion comprising attachment means for connecting to the dump body such that the dump body is pivotably attached to the working machine frame, and second end portion opposite the first end portion, the second end portion being arranged to support the load supporting end portion of the dump body; the dump body comprising a centre axis and at least one guide portion having a guide surface facing downwards and being arranged at the load supporting end portion, the guide portion comprising at least two guiding means (301,302,301', 302') separated and arranged on opposite sides of the centre axis as projected on a horizontal plane in which the guiding means are arranged, and being configured to transfer the load of the dump body to the working machine frame, the second end portion of the working machine frame comprising at least two separate guiding plates (121,122,121',122') arranged to receive the at least two guiding means (301,302,301', 302') of said dump body, each one of the at least two guiding plates (121,122,121',122') being arranged inclined with respect to a horizontal plane, the inclination being towards a centre axis of the working machine being projected onto the horizontal plane, or the inclination being away from a centre axis of the working machine being projected onto the horizontal plane, the two guiding means (301,302,301', 302') and the at least two guiding plates (121,122,121',122') being sloped such that the dump body is guided towards a centred position on the working machine during a pivotal downward movement towards the working machine frame, wherein the inclination of the sloped portions of each one of the at least two guiding plates (121,122,121',122') with respect to the horizontal plane is between 20 degrees and 40 degrees, and wherein the inclination of the sloped portions of the at least two guide plates (121,122,121',122') match the inclination of the sloped portions of the respective guiding means (301,302,301',302'). - a working machine frame; - a dump body comprising: -- an open load receiving area outwardly delimited by a load receiving area circumference; -- a load dumping end portion pivotably attached to said working machine frame; -- a load supporting end portion arranged at a distance from said load dumping end portion; -- an open load receiving area outwardly delimited by a load receiving area circumference; -- a load dumping end portion pivotably attached to said working machine frame; -- a load supporting end portion arranged at a distance from said load dumping end portion; said working machine frame having a first end portion comprising attachment means for connecting to the dump body such that the dump body is pivotably attached to the working machine frame, and second end portion opposite the first end portion, the second end portion being arranged to support the load supporting end portion of the dump body; the dump body comprising a centre axis and at least one guide portion having a guide surface facing downwards and being arranged at the load supporting end portion, the guide portion comprising at least two guiding means (301,302,301', 302') separated and arranged on opposite sides of the centre axis as projected on a horizontal plane in which the guiding means are arranged, and being configured to transfer the load of the dump body to the working machine frame, the second end portion of the working machine frame comprising at least two separate guiding plates (121,122,121',122') arranged to receive the at least two guiding means (301,302,301', 302') of said dump body, each one of the at least two guiding plates (121,122,121',122') being arranged inclined with respect to a horizontal plane, the inclination being towards a centre axis of the working machine being projected onto the horizontal plane, or the inclination being away from a centre axis of the working machine being projected onto the horizontal plane, the two guiding means (301,302,301', 302') and the at least two guiding plates (121,122,121',122') being sloped such that the dump body is guided towards a centred position on the working machine during a pivotal downward movement towards the working machine frame, wherein the inclination of the sloped portions of each one of the at least two guiding plates (121,122,121',122') with respect to the horizontal plane is between 20 degrees and 40 degrees, and wherein the inclination of the sloped portions of the at least two guide plates (121,122,121',122') match the inclination of the sloped portions of the respective guiding means (301,302,301',302').