Engine maintenance needs to pay attention to:

First, the main role of the oil is lubrication, in addition to cooling, cleaning, sealing, rust prevention. With the oil in the operation of the entire system it will be the heat generated by the engine through the oil cooler exchanged to the antifreeze thus ensuring that the engine works in a suitable and stable temperature range. The oil will gradually deteriorate over time, the additives will also be due to temperature reasons and gradually failed, after the deterioration of the oil will lose its due role, this time we need to replace the new oil.

Second, then how long to change the oil is appropriate, each manufacturer's regulations are not the same, let's say that Komatsu excavator is actually the use of Cummins engine, Cummins provides every 250 hours to replace the oil and Komatsu on the provisions of every 500 hours to replace, perhaps the two manufacturers of the oil used by the larger difference, in fact, the oil replacement cycle is determined by the sulfur content of diesel fuel, the sulfur content of 0.5 percent in the diesel fuel, the sulfur content of 0.5 percent in the diesel fuel, the sulfur content of 0.5 percent in the diesel fuel. Diesel fuel sulfur content of 0.5% or more will need to shorten the oil replacement cycle, the corresponding oil standard should also be replaced, but such a professional test we really can not do, so in accordance with the manufacturer's provisions or more reliable.

Third, what brand and what label of oil to replace? --Here it is necessary to tell you about how the motor oil labeling is divided. There are two kinds of motor oil grading currently in use, one grading is API (American Petroleum Institute American Petroleum Institute) standards - rating oil superiority level, the first letter of the C said diesel oil, S said gasoline, if the two signs appear at the same time that means diesel gasoline. If both symbols are present, it means diesel/carburetor oil. There is also a SAE (Society of Automotive Engineers) standard - assessing the viscosity of motor oil, for example, the common SAE 15W-40 W is the abbreviation of Winter, representing the winter, the smaller the number in front of W, the lower its low temperature viscosity. The smaller the number in front of W, the smaller the low-temperature viscosity, the better the low-temperature fluidity, the easier it is to start the car, and the lower the **** temperature the oil is suitable for. The larger the number behind W, the better the oil is viscous at high temperatures (e.g., long-distance driving on the highway), and the higher the strength of the oil film generated, which is a better protective effect. The higher the maximum temperature at which the oil can be used, the better the oil's viscosity at high temperatures (e.g. highway driving).

Nowadays, each manufacturer claims that their oil is based on their own equipment to add any special additives to ensure that the engine life longer, but now how many manufacturers are their own production engine? Generally speaking, the current conventional injection pump engine using CE grade or CF grade oil is no problem, EFI engines need to use CF4 or CG4 grade oil. According to the ambient temperature where the equipment is located to choose the right oil is very important, the manufacturers generally use multi-grade oil, 15W-40 belongs to the multi-grade oil it is applicable to the temperature range is -20-40 degrees Celsius.

Fourth, finished the oil now say filter, oil filter **** or choose the original parts, although these are also manufacturers outside the mining labeling, but at least if there are any problems in the use of the process can look for manufacturers to claim (out of the warranty period it does not matter). A good machine filter can filter out impurities such as abrasive particles and iron filings generated in the system, and will do a good job of keeping the oil clean so that the tiny oil passages on the crankshaft and camshaft are not clogged. Machine filter is folded inside the filter paper, folded in order to increase the filtration area, the general machine filter base will have an oil bypass valve, its role is to make the oil bypass in the case of machine filter clogging to ensure that the entire system will not be due to lack of oil and lead to greater failure.

Fifth, engine maintenance there is a diesel fuel filter, diesel fuel filter must choose the regular manufacturers, regular production of filter paper filter aperture basically maintained between 2-5 microns (human hair thickness is about 70 microns), so that the filter to ensure its filtration accuracy, filtering out most of the impurities in the diesel fuel. Because it is related to the service life of the whole fuel injection system, poor quality diesel filter filter paper filtration accuracy can not meet the requirements, there was a time when a user went to us to buy pieces of him into the door and said you what this is the broken filter element ah, mounted on the use of less than two days on the alarm, I bought a month outside the use of all right, our parts manager smiled at him and said that the filter element blocked better than your school pump it. After the parts manager's explanation, the user understands the reasoning behind the use of genuine cartridges, the original may be half a year on a school injection pump, and then basically a year without school. Air filter usually pay attention to cleaning, general air filter can use compressed air for blowing, blowing to the required number of times to be replaced by a new one. Recommended two brands of filter, one is the Frigidaire, I believe with the