PROBLEM TO BE SOLVED: To inexpensively achieve a walking type tending machine allowing a machine body to be easily pushed or pulled manually even when an engine stops.SOLUTION: The walking type tending machine provided with a hydrostatic continuous speed changer 16 is equipped with: a hydraulic pump 16p driven by the engine 14 a hydraulic motor 16m interlocking the wheel shaft 4 and a closed hydraulic circuit connecting between these hydraulic pump 16p and hydraulic motor 16m with oil passages 75, 76. The closed hydraulic circuit is provided with a bypass oil passage 80 with respect to the hydraulic motor 16m. This bypass oil passage 80 is provided with a mechanical interlocking structure L between the bypass valve 79 and an operating handle 38, the structure L for switching a bypass valve 79 which is normally in a block position for blocking the bypass oil passage 80 by means of pressing action toward the end of a spool 79a, into a communication position for putting this bypass oil passage 80 into a communicating state.COPYRIGHT: (C)2011,JPO&INPIT【課題】エンジン停止の状態でも手動で容易に機体を押し引き操作できる歩行型管理機を廉価に得る。【解決手段】静油圧無段変速装置16を設ける歩行型管理機において、前記エンジン14により駆動される油圧ポンプ16pと車軸4を連動する油圧モータ16mとこれら油圧ポンプ16pと油圧モータ16mの間を油路75,76で接続する閉油圧回路を備え、前記閉油圧回路に油圧モータ16mに対するバイパス油路80を設け、このバイパス油路80にスプール79a端部への押圧作用により常時はバイパス油路80を遮断する遮断位置にあるバイパス弁79をこのバイパス油路80を連通状態とする連通位置に切替える機械的連動機構Lを該バイパス弁79と操作ハンドル38との間に渡って設けた。【選択図】 図4
