Method and arrangement to detect an oil leakage between sections of a hydraulic cylinder

An arrangement to detect an oil leakage between a first section of a hydraulic cylinder a second section of the hydraulic cylinder, the arrangement comprising:

• a movable piston arranged between the first section and the second section in a way that the movable piston changes a position between the first section and the second section dependent on a difference between a first force, which acts at the first section on a first cross sectional area of the movable piston, and a second force, which acts at the second section on a second cross sectional area of the movable piston;
• wherein the first section comprises hydraulic oil with a predefined first pressure, while the first force is calculated based on the predefined first pressure and based on the first cross-sectional area, and the second section comprises hydraulic oil with a predefined second pressure, while the second force is calculated based on the predefined second pressure and based on the second cross-sectional area;
• wherein the first section is connected with a remote controlled first valve, which is closed for the leakage detection;
• wherein a sensor is coupled with the movable piston in a way that any change in position is detected, while a change of the position results from the difference of the first force and the second force resulting from the remote controlled first valve and from an alignment of the first pressure to the second pressure due to the leakage,
• wherein the sensor is coupled with a control, which is prepared and arranged to detect the leakage of oil based on the change of the position.