| 摘要 |
PURPOSE:To pull a work vehicle by another traveling machine by release- operating a hydraulic neutral valve, interposed in the both-way oil passage of a hydrostatic type continuously variable transmission when the non-detection condition of a swash plate angle detection means is detected after a given time elapses from the point of the neutral position setting time of an artificial operation tool. CONSTITUTION:The following means are provided: a set condition detection means A detecting the neutral position of a set speed with an operation lever 10 in a transmitting device 9, a timing detection means B detecting the non- detection condition of a swash plate angle detection means after a given time elapses from the point of the neutral position setting time of an artificial operation tool 10, and a hydraulic neutral means C release-operating a hydraulic neutral valve 18, interposed in the both-way oil passage of a hydrostatic type continuously variable transmission following the detection operation of a swash plate angle detection means PM or the timing detection means B. This permits easy pulling work by another traveling vehicle even if an engine trouble, etc., occurs in a neutral setting condition, and the sure stoppage of a body at the time of neutral operation. |
