PROBLEM TO BE SOLVED: To provide a tractor which realizes a proper supply state of hydraulic fluid to an auxiliary cylinder mechanism connected with a lift arm of the tractor, and facilitates assembly of hydraulic piping or the like related thereto.SOLUTION: A tractor is given in which: lift arms 72L, 72R integrally arranged on the right and left of a lift arm shaft 72 are interlocked by a hydraulic lifting cylinder mechanism LC performing elevating/lowering interlock of an implement and auxiliary cylinder mechanisms 95L, 95R are arranged between the lift arms 72L, 72R and an airframe. Cylinder parts of the auxiliary cylinder mechanisms 95L, 95R are disposed in parallel with the cylinder part of the hydraulic lifting cylinder mechanism LC. A oil supply port 74c to communicate with outside is arranged at a valve body of an implement lift control valve 74 or a cylinder case 71, a first connection adapter 97a and a second connection adapter 97b are connected to the oil supply port 74c in a sequential order, and auxiliary cylinder pipes 95c, 95d are connected to respective adapters 97a, 97b.SELECTED DRAWING: Figure 14COPYRIGHT: (C)2018,JPO&INPIT【課題】トラクタのリフトアームに連結する補助シリンダ機構への作動油の適正な供給状態を具現し、かつ関連する油圧配管類の組付けの容易化を図る。【解決手段】作業機を昇降連動する油圧昇降シリンダ機構LCによってリフトアーム軸72の左右に一体的に設けるリフトアーム72L,72Rを連動する構成とし、リフトアーム72L,72Rと機体との間に補助シリンダ機構95L,95Rを備えたトラクタにおいて、前記油圧昇降シリンダ機構LCのシリンダ部と並列に補助シリンダ機構95L,95Rのシリンダ部を配設する。作業機昇降制御バルブ74のバルブ本体又はシリンダケース71に、外部に連通すべく油供給ポート74cを設け、油供給ポート74cに第1の接続用アダプタ97a、第2の接続用アダプタ97bを順次接続し、これらアダプタ97a,97bの夫々に補助シリンダ用配管95c,95dを接続する。【選択図】 図14
