the cutter table relative to the undercarriage is reached then valve 31 switches into neutral with a view to the auxiliary action of lift cylinder 13 the pressure in cylinders 8 has decreased too since on command position pressure control remains activated too the pressure in cylinder 8 predetermined on scale 24 is reestablished in that valve 30 switches into diagram 35 now the residual weight predetermined by the pressure control does no longer rest on the ground but rather on cylinder 13 the pressure in this cylinder in not in this case very high so that pressure reservoir 17 in view of its higher bias does not receive hydraulic pressure medium on the gas side the cutter table cannot any longer lock downwardly because valve 31 after reaching the desired position is switched into neutral if the table is to be lifted completely the command lift is switched at control switch 21 at this command the position control that is motion pickup 16 and position element 23 are not activated on valve 31 diagram 34 is switched on lift cylinder 13 receives pressure medium until the desired height of the table is reached since in that switching position the pressure independent control for cylinders 8 also remains activated cylinders s are also supplied with pressure medium in the elevated state therefore the table rests both on cylinders 8 and on cylinder 13 when travelling on bumpy field paths weight oscillations of the table.