How to determine the expiration date of hydraulic oil in hydraul

The validity period of hydraulic oil in hydraulic presses should be recorded for regular replacement of hydraulic oil, which is also a part of daily maintenance. Based on the accumulation of equipment operation experience, the time for hydraulic oil replacement can be determined. Only after maintenance can the equipment be orderly put into production. The following summary summarizes the validity period and replacement time of hydraulic oil in hydraulic presses:

一、Take out a small amount of oil from the oil pump for observation and detection. If the viewer color changes, it is found that it has become milky white turbid or yellowish lotion, so it is necessary to replace the hydraulic oil in time.

二、Take out a small amount of oil, and deposit gum in the oil. Twist and pinch it on your fingers. If you feel a lot of gum and strong adhesion, it indicates that the hydraulic oil of the equipment has been oxidized.

三、Directly remove a portion of the deposited oil sludge from the bottom of the oil tank. If a lot of asphalt and transformation are found, it indicates that the oil in the tank has been oxidized and transformed. It is difficult to ensure the validity function of the hydraulic oil in the hydraulic press, and it is necessary to replace the hydraulic oil in a timely manner.

四、Sometimes filter paper is used to filter the oil, and after filtering, it is used in the application equipment. However, if there is black residue on the filter paper, which has a pungent odor, the hydraulic oil of the hydraulic press has undergone oxidation and transformation during its validity period.

五、You can also use the incineration method to distinguish (try not to use this method as much as possible). You will find that the oil contains a lot of water, and incineration will emit white smoke. Before burning, it feels like the oil has lost its stickiness by touching it with your hands. This indicates that the oil has emulsified and is no longer usable.