| 摘要 |
PURPOSE:To prevent surplus rightward or leftward turning travelling by communicating tank ports of two pressure reducing valves, bringing a control valve into a forward and a reverse position, to a tank through a throttle. CONSTITUTION:When, under a state that through swinging of a lever 15 to the oblique longitudinal side, rightward and leftward cornering of a vehicle are effected, the lever 15 is restored to a neutral position, pressure oil of the first or the second pressure receiving part of first or second control valves 11 or 12 flows out to a tank from a tank port 48 of a first or a second pressure reducing valve 16 or 17 through a throttle 49. Therefore, a slight time lag is produced until the pressure of pressure oil is reduced. Since the first and second control valves 11 and 12 are held in a forward position or a reverse position only during the time lag and hydraulic motors 2 and 6 on both sides are run in the same direction at the same speed, surplus rightward or leftward turning travelling can be prevented. |
