Retreat rise control control equipment null of the job machine in the power

摘要

PURPOSE:To prevent the damage of a working machine caused by the rapid lowering thereof by controlling the working machine at a specific state after the backward-moving and lifting mode of the working machine is switched off. CONSTITUTION:When a working machine backward-moving and lifting mode for lifting the working machine to a prescribed height by the backward-moving operation of a vehicle is switched off, a control means 27 inhibits the lifting movement of the working machine. Only when the position of a lift arm coincides with a prescribed position or after the working machine is lifted by the operation of a switch 28, the lowering of the working machine is allowed by the control means 27.