Dump Truck Control Valve Incab fourposition valve design for convenient mounting in the vehicle cab. It controls four working positions: rising, intermediate stop, descent, and slow descent of the truck load, delivering easier operation and greater efficiency. Wide applicability across hydraulic systems. Suitable for mounting in the hydraulic systems of various dump trucks, offering broad compatibility and reliable performance. Practical PTO switch system. Features a selflocking mechanism at the middle stop position to provide clear transposition and simple operation. This design helps the user easily control dumping functions, increasing productivity and work efficiency. Precision control for unloading. Engineered to offer accurate control, improving the accuracy and efficiency of truck unloading and enhancing overall operational productivity. Use scenarios Construction site material dumping: operators raise the bed to the desired height, use the intermediate stop to position the load, and then perform a controlled descent, finishing with a slow descent for precise placement. Fleet yard or quarry operations: quick, repeatable unloading cycles with the PTO switch enable faster unloads and improved throughput, reducing cycle times. Retrofit and upgrading: can be installed in the hydraulic system of various dump trucks to upgrade unloading control, improving accuracy and productivity in existing fleets.