1. Common Faults
* If the working pressure of the system is insufficient and the pressure regulation of the safety valve is too low, the pressure of the safety valve shall be adjusted.
* If the slide valve of the safety valve is stuck, it should be disassembled, cleaned and reassembled.
* If the pressure regulating spring is damaged, replace it with a new one.
* In case of pump failure, the pump shall be repaired or replaced with a new one.
* If the pressure loss of the system pipeline is too large, replace the pipeline or adjust the pressure of the safety valve within the allowable pressure range.
2. Insufficient work flow
* If the safety valve is opened due to overload, the load shall be limited to the rated value.
* If the safety valve fails, check the safety valve.
* If the oil supply is insufficient, check the oil pump.
* The reversing leakage in the valve is large, mainly due to: a. The oil temperature is too high, and measures are taken to reduce the oil temperature; B. The hydraulic oil is not properly selected, and the oil is replaced.
3. Reset failure
* The return spring of the pilot valve is deformed and should be replaced with a new one.
* There is dirt between the pressure rod of the pilot valve and the matching hole, and the parts should be cleaned.
* If the return spring of multi-way valve is deformed, replace it with a new one.
* There is dirt between the valve rod and the valve body of the multi-way valve, and the parts should be cleaned.
4. Unreliable pilot valve positioning
* If the attraction of the electromagnet is not enough, replace it with a new one in time.
* If the current and voltage of the circuit do not meet the requirements, they should be repaired in time.
* There is dirt on the contact surface between the electromagnet and the spring seat, and the dirt shall be treated.
* The clearance between the rocking plate and the pressure bar is not adjusted as required, and it shall be adjusted as required.
5. Boom Lower Too Far
* The wear clearance between the multi-way valve body and the valve stem increases, and the valve stem should be replaced.
* In case of internal leakage of the boom cylinder, replace the seal ring or cylinder.
To be continued. If you need to buy used machinery, please contact us. If you need loader accessories or other construction machinery accessories, you can also contact us!
Post time: Aug-13-2024