Ascent and descent control unit null of the farming job department in the anti- area job

摘要

PURPOSE:To prevent the drop of the rotational speed of an engine caused by the abrupt lowering of a tilling part by slowly lowering the tilling part when the tilling work is started in a state that the tilling part is in non-working state and positioned at the lower position. CONSTITUTION:When a lift arm 5 is in stopped state over a prescribed period at a position lowered beyond a prescribed angle, the tilling part 3 is judged to be at the lower position in non-working state. The tilling part is lowered at a low speed when the tilling work is started in the above state.