Hitachi Excavator Repair
Knowledge and role of Hitachi excavator oil products (including fuel)
No. 10 diesel indicates that its freezing point is not higher than 10 ° C, and so on. The quality of diesel is good or bad. Select diesel according to the above performance indicators. ④ The sulfur content is small. In view of the current incomplete supply and management of diesel and other fuels in some regions in China, please use formal Sinopec and PetroChina Direct fuel! The right rear of the machine (close to the fuel tank) is equipped with a hydraulic oil tank. Role: The hydraulic oil is the medium for the excavator to complete various actions. The implementation of each action on the excavator is driven by the hydraulic oil to promote the actuator. 液压油已被广泛地用于各行各业，每一行业对液压油的性能要求不同，所使用品种也不尽相同，因此液压油的种类很多，难于用单一的标准划分。 Excavator repair hydraulic oil has been widely used in various industries. Each industry has different performance requirements for hydraulic oil, and the varieties used are different. Therefore, there are many types of hydraulic oil, which is difficult to divide by a single standard. Usually divided into HH, HL, HM, HR, HV, HG and other mineral oil hydraulic oil. HM is anti-wear hydraulic oil. ① Appropriate viscosity and good viscosity-temperature performance to ensure that the hydraulic components are well lubricated, cooled and sealed under conditions where the working pressure and working temperature change.
② Good extreme pressure and anti-wear to ensure that the main pump, rotary motor, walking motor, control valve and oil cylinder are properly lubricated under severe conditions of high temperature, high pressure and high speed to reduce wear. ③Excellent antioxidant stability, hydrolytic stability and thermal stability to resist the influence or effect of air, moisture, high temperature, high pressure and other factors, making it difficult to age and deteriorate, and prolong the service life. ④Good foam resistance and air release value, to ensure that the foam generated under the condition of mechanically agitated during operation can quickly disappear; and the air mixed in the oil can be released in a short period of time to achieve accuracy, Sensitive and smooth transfer of static pressure. ⑤ Good anti-emulsification, can be quickly separated from the water mixed into the oil, so as not to form an emulsion, causing the metal material of the hydraulic system to rust and reduce the performance. ⑥ Good rust resistance to prevent metal surface from rusting. From the performance of various hydraulic oils, only anti-wear hydraulic oils can meet the requirements. therefore.
Please choose to use anti-wear hydraulic oil. In addition, in order to make better use of the functions of various hydraulic components and extend the service life of hydraulic components, certain additives are added to the hydraulic oil. These additives can also reduce the noise caused by the reciprocating movement of the cylinder. Hitachi pure hydraulic oil is a high-quality anti-wear hydraulic oil, which can guarantee your machine to work safely and reliably. Therefore, for the healthy use of your machine, please use Hitachi genuine hydraulic oil! The lubricating oil in the engine is added directly from the engine filler. Function: The engine runs at high speed during operation. In order to ensure the long-term and normal operation of its internal parts, oil is required for lubrication. In addition, the oil also has the function of cooling, sealing and cleaning. Diesel engine oil is classified according to performance or use (also known as API use classification), ①CA grade oil: used for light-duty diesel engines. ② CB grade oil: used for medium load diesel engines. Low supercharged diesel engines (including gasoline engines operating under certain heavy load conditions).
High-speed, high-power supercharged diesel engine, that is, heavy-duty diesel engine. ⑤CDⅡgrade oil: used for heavy-duty two-stroke diesel engines. ⑥ CE grade oil: used for low-speed, high-load and heavy-duty diesel engines under high-speed and high-load conditions. The oil also meets the requirements of CC and CD grades. Hitachi excavator engines are high-speed, high-power supercharged diesel engines, and they usually operate under severe operating conditions. Therefore, their performance requirements for engine oil are very strict. Hitachi genuine engine oil is a CD-grade engine oil, which has good lubricity, viscosity-temperature resistance, anti-oxidation, anti-wear and anti-corrosion. It guarantees that your engine works safely and reliably. Therefore, for the healthy use of your machine, please use Hitachi genuine engine oil! Gearbox lubricants in gearboxes, such as pump gearboxes, travel gearboxes, and rotary gearboxes. Role: The same role as engine oil, the main role of gear oil in the gearbox is also lubrication, as well as cooling, sealing and cleaning.
The oil is divided into GL-1 to GL-6 according to the bearing capacity of the gear oil and its application. The following briefly describes the use of the following grades of gear oil. ① GL-1 gear oil: It is mainly used in manual gearboxes for automobiles, including manual gearboxes for tractors and trucks. ② GL-2 gear oil: It is mainly used for automobile turbine rear axle gear (turbine worm gear transmission). ③ GL-gear oil: It is mainly used for manual transmission case and spiral bevel gear rear axle with severe speed and load. ④ GL-4 gear oil: It is mainly used in hyperbolic wheels for various vehicles. ⑤ GL-5 gear oil: used in mild or severe hyperbolic operating conditions and various other gears. ⑥ GL-6 gear oil: used for various gears of passenger cars and other vehicles running under high-speed impact load conditions. Hitachi excavators such as walking speed reducers and rotary speed reducers are gear boxes that operate at low speed and high torque, and the conditions are also harsh. According to its use requirements.