​How to maintain the hydraulic jack?

How do common customers maintain hydraulic jacks every year after purchasing hydraulic jacks? How to maintain the hydraulic pumping station equipped with hydraulic jacks? In the long-term use or unused state, the hydraulic jack dismantles the seal and replaces the inner sealing rings and other hydraulic components. In addition, there are three common methods of oil exchange in the equipped hydraulic pumping station.           
 1.  Fixed-period oil exchange method. This method is based on different equipment, different working conditions and different oil products, stipulate the use time of hydraulic oil for half a year, a year, or work 1000-2000 hours after the replacement of hydraulic oil method. Although this method is widely used in practical work, it is not scientific, can not detect abnormal pollution of hydraulic oil in time, nor can it protect hydraulic system well, let alone use hydraulic oil resources rationally.           
 2.  On-site identification and oil exchange. This method is to inspect the appearance of the identified hydraulic oil by comparing it with the new oil in a transparent glass container, to intuitively judge its contamination degree, or to conduct nitric acid etching test on the spot with PH test paper to determine whether the identified hydraulic oil needs to be replaced. Details can be seen in the field identification of hydraulic oil contamination project table and hydraulic pressure. Oil appearance judgment and external measures.           
 3.  Comprehensive analysis of oil exchange. This method is a method of periodic sampling and testing to determine the necessary physical and chemical properties so as to continuously monitor the deterioration of hydraulic oil and decide when to change oil according to the actual situation. This method has scientific basis, so it is accurate and reliable, and conforms to the principle of oil exchange. However, some equipment and testing instruments are often needed, the operation technology is complex, the test results lag behind, and must be submitted to the oil company for testing. This method has begun to be widely used in the world.           
 In practical work, if only one hydraulic oil index exceeds the prescribed value, we can observe the symptoms while continuing to use. If three indicators have exceeded the prescribed value, the hydraulic oil should be replaced immediately.
 Manual hydraulic pump and electric hydraulic pump can be selected in the configuration of hydraulic jack. We recommend that you use a hydraulic jack with manual configuration to work in a power-free operating environment, depending on the circumstances in which it is used. In the case of lifting equipment with a tonnage of more than 100 tons, we recommend that you choose the matching use of electric hydraulic oil pump. After using, it is necessary to know the maintenance methods of hydraulic jack as follows:           
 During the use of hydraulic jack, attention should be paid to the tonnage ratio of the jack and the corresponding oil pump configuration. Hydraulic Jack in the work needs to know whether the structure design of the jack is single-acting or double-acting, standing or inverted in the use occasion, when lying down, we will suggest that you choose the structure design of the double-acting hydraulic jack can be used 360 degrees, otherwise the single-acting hydraulic jack can only be used upright.