Common faults and troubleshooting methods of excavator multi-way valves to maintain normal use and improve excavator performance

　　The excavator multi-way valve is an important core component for controlling the excavator. Although the technical content of the core parts of the excavator is not high, since it is a component that controls the movement of the excavator, the price of the multi-way valve is also high depending on the material and assembly technology level. Different, although there are many alternatives, TD still recommends purchasing original or high-quality multi-way valves as maintenance replacements.

　　The failure rate of the multi-way valve is actually very low. When we use an excavator, especially after buying a used excavator, the first thing to do is to completely replace the hydraulic oil. The second most common failure is mainly oil leakage. However, considering the different working environments, the hydraulic oil Multi-way valve failures caused by problems are also extremely common. TD still emphasizes the importance of maintenance. Timely replacement of hydraulic oil is an important step that can reduce or even avoid excavator multi-way valve failures.

　　1. Oil leakage from the excavator multi-way valve:

　　- Check whether the seal is damaged or aged and replace it in time.

　　- Check whether the oil line connection is tight. If it is loose, tighten it again.

　　- If the oil leakage is severe, the multi-way valve or related parts may need to be replaced.

　　2. The excavator moves inflexibly or is stuck and uncoordinated:

　　- Check whether the hydraulic oil is clean and replace it if contaminated.

　　- Check whether the valve core, valve stem and other parts inside the multi-way valve are stuck. If necessary, disassemble, clean or replace them.

　　- Check whether the pressure of the hydraulic system is normal. If the pressure is insufficient, check the pump, motor and other components.

　　3. The excavator has low action sensitivity and slow or no response:

　　- Check whether the viscosity of the hydraulic oil is appropriate and replace the hydraulic oil if necessary.

　　- Check whether the control circuit of the multi-way valve is normal. If it is faulty, repair or replace it.

　　- Check whether there is air in the hydraulic system, and if so, vent it.

　　4. Excavator hydraulic oil temperature is too high:

　　- Check whether the hydraulic oil level is normal. If the oil level is too low, add it in time.

　　- Check whether the cooling system is working properly. If there is any problem, repair or replace the radiator.

　　- Reduce continuous working time and avoid overload.

　　5. The working multi-way valve of the excavator makes loud or abnormal noise:

　　- Check whether the hydraulic oil is sufficient or insufficient, and maintain the appropriate oil level.

　　- Check whether there are foreign objects or wear inside the multi-way valve. If necessary, disassemble, clean or replace.

　　- Check whether the hydraulic pump, motor and other components are normal. If there are any faults, they should be repaired or replaced.

　　6. Excavator hydraulic control failure or movement speed:

　　- Check whether the control solenoid valve of the multi-way valve is working properly. If it is faulty, replace it.

　　- Check whether the control circuit is broken or short-circuited. If there is any problem, repair it.

　　- If the control module fails, the entire control system may need to be replaced.

　　When dealing with excavator multi-way valve failures, it is recommended to follow the following principles:

　　- Easy first, then difficult: Check simple causes of faults first, such as loose connections, low oil levels, etc., and then consider complex internal faults.

　　- Outside first, then inside: Check the external components and connections first, then disassemble the multi-way valve to check the internal components.

　　In daily use of excavators, we must have good usage habits. In addition to performing maintenance as required, we must record the usage time and maintenance time. Especially if the excavator has not been started for a long time, regular maintenance of the excavator equipment model is also required. In the excavator industry, users are told that parking the excavator for too long is also very serious for the mechanical aging of the excavator equipment. Therefore, the user or owner needs to start and use the excavator regularly to extend the service life of the excavator.