| 摘要 |
PURPOSE:To prevent inertial running at a time of forward-reverse changeover and to intend to prevent such as seizure on changeover clutches by making right and left travelling brake operatable for a fixed time, and then operating forward-reverse changeover clutches, at a time of forward-reverse changeover. CONSTITUTION:Brake hydraulic fluid pressure generated in respective master cylinders 9 with operation on brake pedals 8A, 8B is supplied to respective brakes 7A, 7B and right and left rear wheel are made to be possible to operate braking selectively for constituting travelling brakes. The master cylinders 9 are provided with pressurizing operation oil passages 10 possible to supply pressurized operation fluid forcibly and are made possible to operate with a changeover valve 11. When forward-reverse is changed over with a lever 4, right and left travelling brake 7A, 7B are made to operate for a fixed time via the changeover valve 11, and then forward-reverse changeover clutches FC, RC are made to operate for performing changeover of. Inertial running at the time of forward-reverse changeover is prevented, and it is intended to prevent changeover clutches from seizing and the like. |
