PROBLEM TO BE SOLVED: To avoid occurrence of forgetting about operation and maloperation of an operation lever by using the single operation lever, and to diversify driving form of a PTO clutch with a differential gear.SOLUTION: The differential gear is installed in a transmission mechanism of a traveling system, and the PTO clutch for connecting and disconnecting the power transmission to the working apparatus side is provided in the transmission mechanism of a working system. Furthermore, the single operation lever 4 for linking to the differential gear and PTO clutch is configured to perform changeover operation to a working position s3 for performing ON operation of the PTO clutch in a differential locking state, a non-working traveling position s1 for performing OFF operation of the PTO clutch in a released state of differential locking, and a differential locking non-working position s2 for performing the OFF operation of the PTO clutch in the differential locking state can be performed.COPYRIGHT: (C)2013,JPO&INPIT【課題】単一の操作レバーを用いて操作レバーの操作忘れや誤操作の発生を回避するとともに、PTOクラッチとデフ装置との駆動形態の多様化を図る。【解決手段】走行系伝動機構にデフ装置を備えるとともに、作業系伝動機構に作業装置側への動力伝達を断続するPTOクラッチを備え、デフ装置とPTOクラッチとに連係する単一の操作レバー4を、デフロック状態でPTOクラッチを入り操作する作業位置s3と、デフロック解除状態でPTOクラッチを切り操作する非作業走行位置s1と、デフロック状態でPTOクラッチを切り操作するデフロック非作業位置s2とに切換操作可能に構成してある。【選択図】図8
