Loading, unloading, and the rotation of the mixing tank are all inseparable from the hydraulic system, so the hydraulic system is very important for automatic mixer trucks. Many mixer truck owners will encounter this problem, that is, the pressure of the hydraulic system is insufficient, which makes the owners very worried. Why on earth is this?
1. Check whether the hydraulic pump of the automatic feeding mixer can output hydraulic oil. For new hydraulic pumps, the hydraulic oil may not flow out, and casting defects (shrinkage, sand holes, etc.) may appear in the pump body. As the suction chamber and hydraulic chamber are connected, the hydraulic capacity will be exhausted. Please replace the pump body as soon as possible. If it is not a new hydraulic pump and there is no hydraulic output, the pump steering may be incorrect, and the parts are severely worn or damaged, so they should be replaced in time
2. If there is oil in the hydraulic pump of the automatic feeding mixer, please check whether the overflow valve operates normally. In case of any abnormality, the valve of the pressure oil circuit may be stuck due to dust and other reasons, and may be in the oil return position, which may cause a short circuit between the pressure oil circuit and the overflow pipeline.
Loose connectors or connectors in the hydraulic circuit. Some valves leak severely. Perhaps the seals on the hydraulic cylinder and hydraulic motor are damaged, resulting in severe leakage. To remove it, disassemble and clean the applicable valve, check the sealing clearance and dimensions of various sealing devices, and replace the sealing device if it is damaged.
3. If the output flow of the hydraulic pump of the mobile automatic feed mixer decreases significantly with the addition of pressure, and the pressure does not reach the specified value, this is due to the gap addition after the wear of the hydraulic pump. The removal method is to measure the volume power of the hydraulic pump to determine whether the pump is still available. Parts severely worn shall be repaired or replaced.
4. The hydraulic system of the automatic feeding mixer can establish normal pressure, and some pipes or hydraulic cylinders (or hydraulic motors) have no pressure. This may be caused by blockage of pipes, orifices or throttles, directional control valves and other components. At this moment, the existence of oil pressure and oil must be checked gradually to find out the cause and eliminate it.
After the above explanation, we understand the causes and maintenance methods, so we are not afraid of encountering these problems. But you should pay more attention to it in your daily use. More relevant matters will come to our website http://www.sdzkjf.cn Consult!