SOIL WORKING MACHINE WITH VARIABLE LENGTH RAISING DEVICE WITH SEVERAL DIFFERENT OPERATING POSITIONS

The present invention relates to a self-propelled earth working machine (10) comprisinga machine frame (14),a traveling gear (16) supporting the machine frame (14),a working apparatus (30), which is designed for working a subsoil,a driving force machine (46) for providing driving force for the earth working machine (10),an operator platform (28) situated on the machine frame (14) at an elevation level above the contact subsurface (U), anda climbing device (48) situated between the contact subsurface (U) and the operator platform (28), which has a plurality of step treads (54, 56, 58, 60), which are situated in succession along a virtual climbing axis (SA),the climbing device (48) being variable in length along the climbing axis (SA) and for this purpose at least one of the step treads (54, 56, 58, 60) being adjustable relative to at least one other of the step treads (54, 56, 58, 60) with the aid of an adjustment actuator (76). The invention provides for the climbing device (48) to be adjustable into at least three different climb-ready operating positions, it being the case that for each step tread pair (54/56, 56/58, 58/60) formed by two of at least three step treads (54, 56, 58, 60) situated in succession along the climbing axis (SA) that the distance between the step treads (54, 56, 58, 60) of the respective step tread pair (54/56, 56/58, 58/60) is of a different magnitude in different operating positions.