Dump Truck Valve Control Valve 2528 HYVA14750667 AC34-6

Original factory serial number: 14750667 (suffix often includes H = 14750667H)
National standard model: AC34-6 / BKQF34-A (industry standard 3-port proportional pneumatic control manual valve)
Brand: HYVA  (European brand for self-unloading hydraulic system heads)
Common name: Cab lifting control valve, dump truck lifting manual control valve, pneumatic proportional directional valve, PTO power take unit control valve
Matching pump identification 2528: Specifically for HYVA 2528 series hydraulic gear pumps, the entire hydraulic system of the front lifting cylinder is matched. Compatible vehicle model
Shuai , Haohan, Shaqi Delong, Foton, Dongfeng, Jiefang 6x4/8x4 construction, sand and gravel, mining dump trucks; equipped with Haowo front-mounted multi-stage lifting cylinder, 2528 hydraulic pump, and complete lifting kit for the oil tank.

The valve body is cast in one piece from aluminum, with a hard oxide coating on the surface for rust prevention. There are a total of 3 sets of pneumatic quick-connect interfaces:
Inlet P: Connects to the vehicle's air reservoir source (6–10 bar working pressure);
Lift Outlet LIFT: Connects to the pneumatic control end of the main hydraulic lifting valve, allowing the vehicle to ascend with air supply;
Drop Outlet DROP: Connects to the pneumatic control end of the lowering valve, allowing the vehicle to descend with air supply;
An internal proportional pressure regulating valve core is installed, and the stroke of the handle can be adjusted continuously to control the air pressure output, achieving slow descent proportional control.