For our hydraulic cylinders, we recommend that you maintain the oil level and remember to filter the oil to keep it clean after first-time use. Part of keeping the oil clean involves installing high-efficiency filters and changing them according to your schedule. Generally, regularly checking your hydraulic cylinders will help to determine when repairs are necessary. For instance, you should check out for signs of rod or cylinder corrosion, pitting, and uneven wear, as these could indicate excess moisture in the fluid. If not addressed in time, this will drastically reduce the longevity of your cylinder.