Hydraulic oil is also an important lubricant type after engine oil. In the hydraulic system, it plays the role of energy transmission, wear resistance, system lubrication, anti-corrosion, anti-rust, cooling and so on.
At the beginning, the time to replace the hydraulic oil was once a year after half a year of use. If it is used infrequently, it can be delayed. The recommended oil change period for ordinary hydraulic oil is one year. Synthetic hydraulic oil is recommended for 3 years. If the sampling inspection is qualified, it can continue to be used.
After half a year, the hydraulic system, spindle lubrication system and X-axis of the machine tool should be checked. If there is any fault, new oil should be replaced and then cleaned.