| 摘要 |
PURPOSE:To improve safety of work by interposing an inching valve in a pressure oil supply oil path and providing inching valve control means for controlling the inching valve in such a manner that the operation of a parking brake can be smoothly conducted from backward region of continuously variable speed operating means to the neutral position. CONSTITUTION:In a working vehicle such as a combined harvester end thresher or the like, forward and backward electromagnetic switching valves (having solenoids 72, 73), an electromagnetic switching valve (having a solenoid 76) for a parking brake and an switching valve (having a solenoid 79) are respectively connected to a pressure oil supply oil path. The respective valves are controlled by CPU 62 to operate the parking brake according to the neutral operation of continuously variable speed operating means. At this time, the inching valve is controlled by inching control means 78 to further smoothly operate the parking brake from the neutral operation after forward travelling to the neutral operation after backward travelling according to output of forward side and backward side travelling switches 56, 57.
|
