| 摘要 |
PURPOSE:To prevent the rotation of a prime mover by the motoring action of an oil-pressure pump connected to the prime mover when the prime mover is in abnormally turned state. CONSTITUTION:Valves 26a and 26b by which the pressures of servo pressure circuits 30a and 30b or signal circuits 25a and 25b are zeroed by closing are provided to at least either side of the servo pressure circuits 30a and 30b and pilot pressure signal circuits 25a and 25b for regulators 22a and 22b. Also, a detection and control means by which the valves 26a and 26b provided on the prime mover side to be detected are closed when detecting the fact that each prime mover is not turned normally is provided. By such a circuit system, abnormal turning of the prime mover can be prevented. |
