Check the listing for details. Dump Truck Tipper Switch Dump Truck Unloading Control Valve With PTO Switch 4. Condition: New. Listed at 49.16 USD. Feature:1. High Performance: The PTO disengages automatically when the vehicle body is lowered, and equipped with warning light ensures safe operation. 2. Application: The proportional control valves is widely used in the hydraulic system of dump trucks and wide applicable for most . 3. Precise Control: Dump truck proportional control valves enable precise control, improving the accuracy and efficiency of truck unloading. 4. Valve Design: Mounted in the cab, the valve has four working positions to control rising, intermediate stop, descent and slow descent. 5. Practical: With self locking of middle stop position, clear transposition and simple operation, easily control dumping functions and increase productivity. Specification:Item Type: Proportional Control Valves Material: Aluminum + plastic