Heavy handles and slow movements are obstacles to efficient excavator operation

In various construction sites such as buildings and mines, excavators are the main force, and their operating efficiency is directly related to the progress of the project. However, when the excavator has a heavy handle and slow movement, it is like a tiger tied up, which seriously hinders the construction process. What is the mystery behind this? How to break through this dilemma? Let's take a deep look at key issues such as "reasons for slow movement of excavators" and "solutions to heavy handles". ​

Hydraulic system failure: common root causes of problems

Hydraulic oil contamination: Hydraulic oil used for a long time is easily mixed with impurities, water and other pollutants. Once the hydraulic oil is seriously contaminated, it will not only reduce its lubrication performance, but also cause increased wear of internal parts of the hydraulic system. For example, when impurity particles in the hydraulic oil enter the gap between the valve core and the valve sleeve of the distribution valve, it will increase the resistance of the valve core movement, making the excavator handle feel heavy to operate. At the same time, hydraulic oil contamination will also affect the oil suction and discharge effects of the hydraulic pump, resulting in insufficient system pressure and causing "slow movement of the excavator". According to statistics, about 30% of the heavy handle and slow movement problems are caused by hydraulic oil contamination. Therefore, regular inspection and replacement of hydraulic oil is the key to maintaining the good performance of the excavator, which is also an important part of solving the problem of "what to do if the excavator handle is heavy". ​

Hydraulic pump failure: As the power source of the hydraulic system, the performance of the hydraulic pump directly affects the working state of the entire system. If the internal parts of the hydraulic pump are severely worn, such as the matching clearance between the plunger and the cylinder body is too large, the volumetric efficiency of the pump will decrease and the output flow will be insufficient. At this time, when the excavator is working, the response speed of the handle operation will be significantly slower, and the action will become sluggish and weak. For this situation, professionals are required to disassemble and inspect the hydraulic pump, replace the worn parts if necessary, or directly replace the hydraulic pump to solve the problem of "how to repair the slow excavator".

Wear of mechanical parts: factors that cannot be ignored

Wear of joystick connection parts: The excavator's joystick is connected to the hydraulic control valve through a series of connection parts. As the use time increases, these connection parts, such as pins, bushings, etc., will wear due to frequent relative movement. When the connecting parts are worn to a certain extent, a large gap will be generated, resulting in a clearance in the joystick during operation, and the action transmitted to the hydraulic control valve will be inaccurate, which will make the handle feel heavy, and will also affect the accuracy and speed of the excavator's action. Timely inspection and replacement of worn connecting parts can effectively improve the feel of the handle operation, improve the operating performance of the excavator, and provide ideas for solving the problem of "what's wrong with the heavy handle".
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Wear of slewing bearing and walking mechanism: Wear of slewing bearing and walking mechanism will also affect the action of the excavator. If the slewing bearing ball is severely worn, it will increase the slewing resistance, making the excavator move slowly when rotating, and it may also cause greater force when operating the handle. Wear of crawler shoes, drive wheels and other parts in the walking mechanism will affect the walking speed and stability of the excavator, and indirectly cause the handle operation to feel heavy. Regular inspection and maintenance of these mechanical parts and timely replacement of worn parts are necessary measures to ensure the efficient operation of the excavator. ​

Abnormal electrical control system: hidden problems

Sensor failure: Modern excavators are equipped with many sensors to monitor and feedback various working parameters of the machine. For example, the pilot pressure sensor is responsible for detecting the pressure of the pilot oil circuit and transmitting the signal to the controller to control the opening of the main valve. Once the sensor fails and the output signal is inaccurate, the controller cannot correctly control the operation of the hydraulic system, resulting in a heavy handle and slow movement. When the sensor is suspected to be faulty, professional testing equipment can be used to detect and calibrate the sensor to ensure the normal operation of the electrical control system and solve the problem of "how to solve the slow movement of the excavator".

Controller failure: As the core of the electrical control system of the excavator, the controller is responsible for receiving and processing various signals and issuing instructions to control the hydraulic system and other actuators. If the controller fails, such as program errors, hardware damage, etc., it may cause abnormal control of the hydraulic system, causing a series of problems such as heavy handles and slow movements. For controller failure, professional technicians are required to use professional software to diagnose and repair, and replace the controller if necessary.

When the excavator encounters the problem of heavy handles and slow movements, don't panic. By conducting a comprehensive inspection of the hydraulic system, mechanical components, and electrical control system, identifying the root cause of the problem, and taking targeted solutions, such as replacing contaminated hydraulic oil, repairing or replacing faulty components, the excavator can be restored to an efficient operating state, free from the constraints of these two "roadblocks", and continue to perform well in engineering construction. ​

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