| 摘要 |
PURPOSE:To go up a slope safely by eliminating any slip down in a restart time after stopping once on the way to go up a sharp slope. CONSTITUTION:In a movable farm machine in which a parking brake is turned on/off by the operation of a parking brake lever and at the same time the rotation input of a hydraulic clutch type transmission M is intermitted, such a means is provided as a sustaining means C for keeping the ON state of the parking brake until a pressurized oil produced by an operation pump P inside this hydraulic clutch type transmission M after inputting the rotational force of the transmission M by the operation toward the OFF side of the parking brake lever is raised to a certain constant pressure.
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