| 摘要 |
PROBLEM TO BE SOLVED: To decrease the cost and facilitate the management of component parts owing to adoption of common component parts and allow easy recovery even in case a failure is generated in the control system of an electronic type servo control mechanism. SOLUTION: A shift operation structure of a working vehicle according to the invention includes the servo control mechanism 25 formed so as to control the operation of a variable displacement pump 16 on the basis of the detection result of an operating position detection means 29 and the detection result of a swash plate position detection means 30, in which the swash plate position detection means 30, a servo valve 27, and a regulator valve 28 of the servo control mechanism 25 are embodied in a unit system and attached detachably to a housing 4B of a hydrostatic type continuously variable transmission device 10. COPYRIGHT: (C)2007,JPO&INPIT
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