The performance and service life of hydraulic systems are affected by oil. This is mainly because the fluid not only transmits power, but also converts hydraulic energy into mechanical ones. It also has lubrication, cooling, sealing and hydraulic cylinders, hydraulic pumps and hydraulic valves. Antirust and other effects. In a sense, from the perspective of the operator, the correct maintenance of the hydraulic system is actually the correct use and maintenance of the oil. Practice has proved that this is not too much to say. Although hydraulic oil tanks are independent and shared with other transmissions, oils with special hydraulic oils are also useful, and even gear oils or oils are used, but the hydraulic system must not be said to require strict fluids. The fluid in the hydraulic system should be and must be properly selected in accordance with the types and specifications specified in the instructions for use and maintenance. In any case, it must not be replaced or mixed. It must not be used in diesel engines or other gears. In order to prevent mechanical or liquid contaminants from entering the tank during the replacement or replenishment of the fluid, they must be thoroughly cleaned before and after the drain plug and the fuel cap are unscrewed. In order to retain iron and steel metal particles, some oil drain plugs are provided with permanent magnets. When cleaning such magnetic plugs, they must be brushed and lightly tapped to trap the trapped metal particles. The tank should be cleaned immediately after the fluid system has been decommissioned, and the mechanical impurities are carried out in a hot state in which the precipitate has settled in the future and the oil has not yet thickened. When refueling, the refuelling container must be clean and use a strainer. Hydraulic oil should be added to the dipstick mark or other oil level indicator. To avoid overfilling, overfilling will cause defoaming to deteriorate and the respirator to become blocked causing the hydraulic system to inflate. Wind, rain and snow enter. During use, the dipstick or oil level indicator must be checked frequently. If the oil level of the tank is too low, it should be added back. If the oil level is too low, the air can easily enter the pipeline and affect the normal operation of the hydraulic pump and even the hydraulic cylinder. Even if air does not enter the pipeline, when the oil level is low, the air contained in the tank increases, and the moisture contained in the air condenses into much water (especially in a humid environment), thereby increasing the liquid impurities in the oil, and the liquid impurities. It will combine with other impurities to form sewage, sludge, plug filters, filters, and even make the safety valve, return valve blocked or even killed (hanging); if the water is separated from the oil will cause corrosion of metal parts. If the oil level is often reduced, check the hydraulic system for leaks. External leakage is usually found to be not difficult because the leaking liquid causes the dirt to adhere to the surface of the part to form a wet, greasy cover. However, it was found that the internal leakage was difficult and it was difficult to find when the leakage was slight. The danger of endoleak is that the leaked oil will contaminate other fluids inside the machine and hinder the normal operation of other components. Before the hydraulic pump is not strict, or the hydraulic pump driving gear shaft seal is not strict, the pipeline has air, not only affects the hydraulic pump pressure, flow, but also easy to produce agricultural equipment with jitter, so that the hydraulic pump, hydraulic cylinder and other accelerated wear As well as increasing the temperature of the oil in the hydraulic pump, the oil is susceptible to deterioration due to contact with oxygen in the air. The oil level on the tank sometimes rises. If the foam at the same time is serious, and the agricultural machinery shakes, it means that air enters the hydraulic pump. If only the oil level rises, check whether any other liquid (including rain and snow) leaks into the hydraulic system. Never use an increase in safety valve opening pressure to cope with overload. This not only makes it easy to damage the parts due to overload, but also causes additional thermal effects due to extra pressure oil overflow, resulting in an extra rise in oil temperature. When the temperature rises, the fluid becomes thin. When the fluid is too dilute, lubrication, cooling, and poor sealing often result in deterioration of the working performance of the fluid. The wear of the component is aggravated, the internal leakage of the system increases, and the working efficiency drops significantly, even in the hydraulic system. Damaged seals and metal parts. Therefore, try not to overload the system. In cold weather, the oil will become very thick or even "pump not move", "pump not move", the hydraulic pump selects the oil according to the season, in the winter also pay attention to the correct warm-up of the fuel tank. When installing the hydraulic pump on the tractor, in order to prevent the pump from being oiled due to the vapour at the beginning of the work, the hydraulic pump is filled with clean oil to be used as an “introduction†before installation. When installing the hydraulic system piping, the piping must be thoroughly cleaned after the piping has to be completely routed to the system piping. For high-pressure lubricated hydraulic pumps, after the hydraulic pump has just been engaged with the transmission to pump oil, the agricultural implements should be raised first, and the hydraulic pump is loaded at the oil end to increase the working pressure, which is beneficial to the high-pressure lubrication oil passages. It is beneficial to the good lubrication of gears, friction sleeves such as floating sleeves and bushings, and to reduce wear of gears and floating sleeves and shafts.
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