一级特黄毛片,www.欧美色,91久久久精品无码一区二区大全,韩国欧洲一级

　　1、 Daily use and maintenance knowledge of engine oil 1

　　I think it's time for the car owner to think that it's time for the oil to turn black, but the professional car maintenance personnel say that this understanding is not comprehensive. At present, the detergent added to the engine oil for automobile will wash the adhesive film and black carbon on the piston, and disperse them in the oil to reduce the formation of high-temperature deposits in the engine. Therefore, the color of the engine oil is easy to turn black after a period of use, but the oil is not completely deteriorated at this time. Therefore, it is not necessary to change the oil if it is black. Xiaobian suggests that if the oil has been used for a long time, you need to consider whether to replace it.

　　2、 Daily use and maintenance knowledge of engine oil 2

　　Is the oil additive useful? According to the professional automobile maintenance personnel, the real high-quality oil is the finished product with a variety of engine protection functions, and the formula already contains a variety of additives. However, if it is added by itself, it will react with the chemicals in the engine oil, resulting in the decline of the comprehensive performance of the engine oil. Therefore, the car should not be added on its own to avoid damage to the car. Presumably, many car owners have had the situation of adding oil directly when the oil is not enough. It is time-saving and labor-saving. However, the quality of the oil will gradually decline due to pollution, oxidation and other reasons during the use process. If the oil is added all the time without changing, the quality of the oil will be relatively poor.

　　3、 Daily maintenance of loading crane:

　　The oil products often used by loaders in daily production mainly include engine oil, engine diesel oil, oil for torque converter / gearbox (hydraulic transmission oil), oil for drive axle, hydraulic oil for hydraulic system and lubricating grease for hinge pin. Even if these oil products are selected and used in the right way, the oil will also be used in the process of use because of machine and production needs To use the oil for a period of time, there will be some mechanical particle impurity pollution or water pollution. Tongrui oil filter Co., Ltd. has made a simple selection and Analysis on the oil filter equipment selected for reference after the oil products of the loader are polluted, which is of great significance to maintain the normal operation of each system, reduce wear and prolong the service life of the machine, so as to provide reference for everyone in the process of using and maintaining the loader.

　　1. Engine oil: it is recommended to use CD grade engine oil for the diesel engine of loader due to its poor working conditions and heavy working load. CD sae20w / 40 is recommended for the South and CD sae5w / 30 or 10W / 30 is recommended for the north. CE, CF and above grade engine oils are required for some imported engines, for example, CF-4 or higher grade engine oils are required for Cummins engines.

　　2. Engine diesel: diesel oil with sulfur content lower than 0.5% is generally used. If the sulfur content is high, the oil change cycle will be shortened. Generally, the light diesel oil specified in gb252-1994 is used as the diesel oil of the loader, which is suitable for the high-speed diesel engine with full load speed over 1000r / min.

　　(description of oil: at present, the viscosity classification of oil widely used in the world is the classification standard of SAE (American Society of Automotive Engineers), for example, sae5w / 40 or sael5w / 40, "W" means winter. The smaller the number in front of it, the thinner the viscosity of oil, the better the fluidity, and the better the protection effect on engine during cold start. The number after "W" is the index of high temperature resistance of engine oil. The larger the value is, the better the protection performance of engine oil under high temperature is. The resistance of high viscosity engine oil to motion system is relatively high, which not only consumes power and increases oil consumption, but also is easy to oxidize, which affects the protection during cold start. )

　　For the above two kinds of engine oil pollution, the oil filter selection reference note: for the engine oil with high viscosity, when impurities need to be filtered, the oil temperature needs to be warmed up in advance to reduce the oil viscosity and make its fluidity better, so that when the oil filter equipment works, it is not easy to sudden rise of pressure and the oil treatment efficiency is higher, and the oil treatment effect is better. It is recommended to use yl-r heated three-stage oil filter or BK pressure plate and frame oil filter to remove the particle impurities in the oil to improve the cleanliness of the oil.

　　If water and impurities are to be treated together, please refer to zjd-c high viscosity special oil filter, and dispose the water and impurities in the oil together.

　　3. Torque converter / gearbox oil (hydraulic transmission oil): generally, the hydraulic transmission oil used for loaders is No.6 hydraulic transmission oil in the enterprise standards of Lanzhou refining and Daqing Petrochemical General Plant, and No.6 hydraulic transmission oil is mainly used for diesel locomotives and construction machinery.

　　Refer to instructions for selection of oil filter: generally, yl-b common multi-stage oil filter for filtering impurities is purchased for this kind of oil, and ZJD coalescing vacuum dehydration filter special oil filter for filtering lubricating oil is processed together with emulsified gas of water impurities.

　　4. Oil for driving axle: (1) gear oil: it is recommended to use cle grade gear oil for driving axle of general loader.

　　(2) Drive axle brake oil (brake oil): generally, hzy3 synthetic brake fluid specified in gb12981 - 91 is used for the brake oil (not full hydraulic brake) of the drive axle of the loader, which is equivalent to sael703c oil specified in API.

　　Instructions for selection of oil filter: the type of oil filter is also selected according to the oil viscosity reference and functional requirements. The suitable oil filters are yl-b ordinary three-stage oil filter, BK pressure plate frame oil filter, yl-r heating oil filter and zjd-c high viscosity special multi-functional oil filter.