The inspection content of the working hydraulic system. If the operation is found to be weak, the car runs empty for a while. If the sports car feels weak, it must be the engine problem. Then check it according to the above method. If the sports car is very smooth, it can eliminate the engine problem. The next thing to do is to check the hydraulic oil pressure of the hydraulic system and see the specific data, Then judge the source of the problem according to the actual results.
How to measure the pressure? The mixer manufacturer first introduces the pressure tap. Generally, for conventional models, the pressure tap is reserved at the connecting steel pipe between the distribution valve and the large and small cavity of the rotary bucket oil cylinder (Note: all models have it here). When measuring the pressure, it is required to connect the interface on the right, that is, the steel pipe of the large cavity of the rotary bucket oil cylinder.
In addition, on the oil inlet pipe from the working pump to the distribution valve, basically all models will be equipped with one more pressure tap. Because this pressure tap is on the oil inlet pipe, it is very close to the working pump, and the measured pressure will be a little higher than that measured at the steel pipe in the large cavity of the rotary bucket cylinder. However, the two detection ports are essentially no different, which can be measured. Turn off the engine before testing, turn the bucket to the unloading state, let all the pressure oil in the large chamber of the rotary bucket oil cylinder drain, and then use the pressure gauge to test directly.
Connect the pressure gauge, start the vehicle, retract the bucket and receive the head. Keep the operating lever still and press the accelerator to the bottom at the same time, that is, press the bucket retraction screen with a large accelerator for about a few seconds to make the pointer on the pressure gauge stop moving, and then read the data on the pressure gauge, Compare this data with the standard data (in the user manual when buying the car). If it is a little lower, it means that adjustment is needed, or the system has internal leakage. If it is much lower or even no pressure, it is mostly because the main valve of the distribution valve is stuck and needs to be disassembled for cleaning,