How do we solve the problem of excavator arm drop?
1. Check the working environment temperature of the excavator, whether the hydraulic oil model is used improperly, and whether the inferior hydraulic oil is used.
2. When the boom fails, you can first reduce the boom pressure and carefully observe whether the boom is falling rapidly.
3. Check the hydraulic cylinder and cylinder oil seal for malfunction. If the oil seal is poorly sealed, oil may leak. Replace the oil seal in time.
4. After replacing the oil seal, if the arm is still removed, check the dispense valve and the boom return safety valve.