First check if the trimmer positioner is damaged. For example, you can adjust the different values of the positioner to cut the air multiple times to feel the pressure is the same every time. If there are multiple occurrences, the positioner is not sensitive and needs to be replaced. Another problem is that no matter how large the positioner is adjusted, the pressure does not change, indicating that the positioner is broken and needs to be replaced.
Inaccurate contact with the board and insensitivity to the solenoid valve can result in unstable pressure.
The pressure of the rocker cutting machine becomes smaller:
The trimmer positioner is damaged, and the pressure is not changed and needs to be replaced.
The oil pump is damaged and the oil pump is worn inside and needs to be replaced.
Loosen the cylinder or tubing connector and check the cylinder for oil leakage. According to the type of rocker cutting machine, the oil of a rocker arm is from the bottom of the machine head and there is overflow on the upper side of the casing, which is convenient to see. The second type of rocker cutting machine needs to open the fuel tank cap to check whether the bottom of the cylinder is injecting oil. If it is determined that the oil leaks, replace the seal in time. There is very little chance of oil cylinder and cylinder plunger damage and oil leakage, and remember to check if the tubing joint is loose.
The temperature of the hydraulic oil is too high. For example, the use of the power supply suddenly becomes smaller, even without pressure. After a few hours of downtime, there was pressure to use it again, and then there was no use for a while. In this case, it is recommended to replace the hydraulic oil, remember to buy cheap hydraulic oil without greed.