After using the excavator for a period of time, many excavator masters responded that the excavator always showed problems in the process of operation, which affected the power of the excavator. Master Yang of the repair shop teaches you some basic diagnosis methods when the excavator fails during the operation process:
1. The speed of all actuators is low. If the load is reduced and the speed is added, there may be a problem with the main relief valve. If the speed is too low, the pump control system may be defective, and the pilot system may also be defective. The maintenance materials of modern excavators are mainly soil, coal, sediment, and pre-loosened soil and rocks. Judging from the development of construction machinery in recent years, the development of excavators is relatively fast, and excavators have become one of the most important construction machinery in engineering construction. The three most important parameters of the excavator: operating weight, engine power and bucket capacity.
If the N sensor is defective, it does not appear to have a small violation in speed, but shows an abnormal value, such as Omin-1
2. When performing a single walking job, the left crawler is slow, but the right crawler is normal. Single reversal work is slow. Single bucket operation is normal.
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For some reason, the oil delivery of pump 2 drops to a minimum. Therefore, the speed of the left track and the reverse function are too slow because they are driven by the pressure oil of the pump 2.
The boom and boom cylinders are driven by the pressure oil from the pump 1. Therefore, when the boom or boom performs a single job, the speed of the boom and boom decreases slightly, but when performing a horizontal push and push operation , The amount of oil flowing to the boom cylinder is prior to the boom cylinder. Therefore, almost no oil is supplied to the arm cylinder, so the arm speed is reduced.
3. When performing a single walking job, the right crawler is slow, but the left crawler is normal. A single bucket works slowly. Single reversal works fine, and forearm promotion is difficult when leveling.
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Due to some reasons, the pump l's oil delivery volume drops to a minimum (about 20 liters / min). Therefore, the speed of the right track and bucket are too slow, because they are driven by the pressure oil of the pump 1.
The boom and boom cylinders are driven by the pressure oil of the pump 2, so when the boom or boom performs a single job, the speed of the boom and boom decreases slightly. However, when performing a horizontal push and push operation, the flow The amount of oil delivered to the boom cylinder is prioritized over the boom cylinder, so almost no amount of oil is supplied to the boom cylinder, making the boom immobile.
4. Even after the control lever returns to the neutral position, the actuator does not stop, and the sticking of the pilot valve spool or the main spool of the control valve may be the cause of the problem.
