PROBLEM TO BE SOLVED: To provide a combine harvester designed so as to enable a reaping part to be readily mounted and demounted during maintenance operation of the reaping part before and after the operation and having a high operating efficiency by simplifying a hydraulic pipe without making the hydraulic pipe interfere with the vertically moving reaping part.SOLUTION: This combine harvester 12 is equipped with a traveling device 3, the reaping part 4, a driving operation part 7, a tank 9, a hydraulic infinite variable-speed drive 10, an oil forced feeding means for forcedly feeding an oil and a motor 11 which is a driving source for the reaping part 4, a threshing part 8, the hydraulic infinite variable-speed drive 10, etc. The combine harvester 12 is provided with a reaping vertical valve 14 communicating with a lifting and lowering means and the oil forced feeding means in one lateral part in the left and right directions of a traveling case 1 and comprising a relief valve 13 internally installed therein. A manifold 15 for making the other lateral part communicate with the hydraulic infinite variable-speed drive 10 and guiding the oil passing through the relief valve 13 from the side of the reaping vertical valve 14 to the side of the hydraulic infinite variable-speed drive 10 is integrally formed in the interior of the traveling case 1.COPYRIGHT: (C)2003,JPO【課題】 油圧配管を簡素化し、該油圧配管が上下動する刈取部に干渉することなく、また、作業の前後に刈取部のメンテナンス作業時に刈取部を容易に着脱できるようにした作業性の高いコンバインを提供すること。【解決手段】 走行装置3と刈取部4と運転操作部7とタンク9と油圧無段変速装置10とオイルを圧送するオイル圧送手段と刈取部4や脱穀部8や油圧無段変速装置10等の駆動源である原動機11とを備えたコンバイン12であって、走行ケ-ス1の左右方向の一側部に前記昇降手段及びオイル圧送手段と連通し且つリリ-フ弁13を内装する刈取上下弁14を設けると共に他側部を油圧無段変速装置10に連通し、リリ-フ弁13を通るオイルを刈取上下弁側から油圧無段変速装置側に案内するマニホ-ルド15を走行ケ-ス1の内部に一体形成してなるコンバイン。
