| 摘要 |
PURPOSE:To prevent the off-operation of the PTO from being forgotten and prevent a damage of an oil hydraulic pump, etc. by providing an electric circuit cutting off to PTO after a carrier box is lowered. CONSTITUTION:When a carrier box 1 is to be lowered, a switch S is switched to a descending position, then the SOLB is energized and a pilot valve 9 is switched to the lower side. A transfer valve 7 is switched to the lower position by the pilot pressure through a pilot valve 9, and an oil hydraulic cylinder 3 is shrunk to lower a carrier box 1. When the carrier box 1 is completely lowered to its storage status, a limit switch LS is closed, thereby a time T is operated, and a timer contact point (t) is opened after a fixed time, then the self-holding action of a relay R is stopped, the SOLC is deenergized and the PTO is cut off. |
