| 摘要 |
PROBLEM TO BE SOLVED: To provide a turn controller for a working vehicle allowing an operator to switch a direct advance state to a turning state speedily irrespective of a desired speed of turning in a turning state when switching the states. SOLUTION: In this turn controller for the working vehicle, a traveling driving means constituted to switch driving states of a pair of right and left traveling devices between a direct advance driving state and a turning driving state freely, to switch to the turning state by bringing the friction type hydraulic clutch of a hydraulic operation type into the turning driving state is provided, and an operation control means 64 for operating a supply pressure adjusting means 71 for changing and adjusting the pressure of pressure oil supplied to the traveling driving means and the friction type hydraulic clutch based on commands from a steering command means 200 keeps the supply pressure adjusting means 71 in the state of maximum supply pressure or a value close to it until pressure oil flows into the friction type hydraulic clutch brought into a turned-on state and the supply pressure exceeds a set value or during a set period of time when switching the direct advance driving state to the turning driving state. COPYRIGHT: (C)2009,JPO&INPIT
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