When the air pressure of the loading concrete mixing tank truck system is insufficient or there is no pressure at all, we can check according to these aspects.
1. If the hydraulic pump of the mixing and filling truck has oil output, we can check whether it works normally in time. If it is not normal, it may be that some equipment accessories in the pressure oil circuit are stuck for other reasons and are at the place of oil return, resulting in short circuit of pressure oil circuit and overflow circuit, or loose pipe joints. When some equipment in the oil circuit leaks seriously, or the seals of hydraulic cylinder and hydraulic motor are damaged. The solution is to directly disassemble the relevant equipment for cleaning to see if the corresponding equipment is damaged. Replace it when it's time to replace it and check it when it's time to check.
2. See if the hydraulic pump of the self feeding concrete mixing tank truck can output hydraulic oil. If it is a new hydraulic pump without hydraulic oil, it may be that the pump body is defective, so that the oil suction chamber and oil pressure chamber are connected. If the oil pressure capacity is lost, it should be replaced by Lu Zun machinery manufacturer in time. If it is not a new hydraulic pump and there is no hydraulic oil output, the steering of the pump may be wrong, and the parts may be seriously worn or damaged. Replace them in time.
3. The hydraulic system of the self feeding concrete mixing tank truck can establish normal pressure, and there is no pressure in some pipelines or hydraulic cylinders. It may be because the pipelines, small holes, throttle valves and directional valves are blocked. Therefore, check carefully to see if there is oil passing through the pressure, find out the cause, and then eliminate it.
4. If the output flow of the hydraulic pump from the concrete mixing tank truck decreases significantly with the increase of pressure, and the pressure does not reach the specified value, it is due to the increase of the clearance after the hydraulic pump is worn. The elimination method is to measure the volumetric efficiency of the hydraulic pump, so as to determine whether the pump can continue to be used. The severely worn products must be repaired or replaced.
The above is the treatment method for insufficient pressure of self feeding concrete mixing tank truck compiled by Xiaobian. If there is insufficient or no pressure in the hydraulic system of the mixing truck, it can be checked and solved according to the above methods to make the mixing truck return to normal state in time.