Key benefits Selflocking middle stop for secure transitions and simple operation: enables precise control of dumping functions, improving productivity and work efficiency. Cabmounted fourposition valve design: rising, intermediate stop, descent, and slow descent control the truck load with ease, enhancing operator comfort and efficiency. performance PTO with automatic disengagement: the proportional control PTO switch valve system automatically disengages when the truck bed is lowered, reducing wear and preventing stopping damage. A builtin warning light provides clear process awareness. Wide applicability and compatibility: can be mounted in the hydraulic system of various dump trucks, offering versatile use and efficient integration. Product characteristics and suitability Function: Proportional control PTO switch valves with a selflocking middle stop position for reliable operation and straightforward dumping control. Compatibility: cabmounted installation compatible with a range of dump truck models and hydraulic systems. Performance: automatic PTO disengagement during bed lowering minimizes wear and potential damage; builtin warning light enhances operator awareness of system status. Design emphasis: practical, userfriendly configuration aimed at improving dumping control, reducing cycle times, and increasing onsite productivity. 23 use scenarios Construction site material placement: A dump truck operator uses the fourposition valve to raise the bed to the desired height, pauses at the intermediate stop, and lowers with controlled descent, reducing material scattering and improving placement accuracy. Landscaping or municipal work: In curbside or yard projects, the cabmounted valve allows quick, precise dumping from the front of the truck, keeping the operator within the cab and improving site safety and efficiency. Mining or heavyduty operations: For regular unloading tasks, the system's automatic PTO disengagement during bed lowering minimizes wear on the drivetrain, while the warning light keeps the operator informed of system status.