Slope work vehicle

A slope work vehicle capable of traveling on a slope and performing work, the slope work vehicle comprising:

• a work vehicle main body that includes an operating seat;
• a traveling apparatus that is provided in the work vehicle main body and of which a control state changes depending on operations by a worker in the operating seat;
• a winch that is provided in the work vehicle main body;
• a traveling apparatus actuator that is connected to the traveling apparatus and drives the traveling apparatus;
• a winch actuator that is connected to the winch and drives the winch;
• a hydraulic pump that supplies oil to the traveling apparatus actuator and the winch actuator in parallel;
• a single flow amount adjustment valve that is provided between the hydraulic pump and the traveling apparatus actuator and is configured to apportion the oil between the winch actuator and the traveling apparatus actuator;
• a control means for controlling the flow amount adjustment valve;
• and
• a tilt sensor provided on the work vehicle main body that senses a tilt of the work vehicle and is connected to the control means, wherein
• the control means is configured to control the flow amount adjustment valve in response to tilt of the slope sensed by the tilt sensor so that a supply of oil is apportioned between the traveling apparatus actuator and the winch actuator so that the slope work vehicle does not fall from the slope when the slope work vehicle is positioned on the slope;
• the flow amount adjustment valve is configured also to be adjusted manually directly or through the control means independently of the tilt sensor by an operator of the work vehicle seated in an operating seat in the vehicle main body;
• and
• the control means is configured also to prevent manual adjustment of the flow amount adjustment valve to decrease supply of oil to the winch actuator when the slope approaches being vertical.