The maintenance of the excavator believes that everyone is more familiar with the diesel oil and water separator every 250 hours to replace the engine oil, the machine filter, 500 hours to replace the diesel filter, oil and water separator, hydraulic oil filter and so on, of course, the different model maintenance time has some differences, according to the specifications of the regulations into the rules. OK, OK, but will you really change the oil?
Believe oneself to have done the boss that maintains all know, change engine oil is by no means twist a screw to put engine oil in again so simple, buy what brand model of oil? Is the oil mark higher and better? When will it be changed? How much do you add? These problems can only be understood by themselves. In today's article, we will explain these problems.
The higher the quality of the oil, the better the quality of the better?
Do you have a dazzling feeling when you go to a gas station or a specialty store to buy oil? This is the way to buy oil in the early years. Looking at a pile of green and green bottles on the shelves, only one brand, a string of numbers and letters do not know what to mean. After a salesman 's "flicker", it took hundreds of oceans to carry a barrel of oil to return home, and thought he was especially professional. How about it!
He said I was flicker again, saying if you really bought your oil or not, it was wrong to buy, it was not necessary to buy the oil, so it was not necessary to use the oil of such a high mark. Then the little editor was also hard to learn the oil. The cargo clerk flickered and carried it away. Of course, the money still had to be paid. Well, today, this once "Xiao Bai" also came to be a teacher.
General oil in the external packaging will contain brand, label, capacity and other information, the brand is not much said, the selection of big brands is better than the small factory, the capacity, the capacity of the words according to their specifications on the capacity to buy some spare on the line, but this mark is worth saying.
The oil grade includes two parts: grading and viscosity specification.
Oil classification is represented by two alphabetical combinations. "S" at the beginning of a series of gasoline engine oil, the general specifications from SA to SN (in alphabetical order, but not SI), each increasing one letter, oil performance will be better than the previous one, oil will have more to protect the engine additives; the higher the quality of the letter, the higher the international brand in the machine. The oil level is more than the SF level. The "C" series represents diesel engine oil. If the two letters of "S" and "C" exist at the same time, it means that the oil is general type of steam and diesel.
In addition to a classification, a series of more common letters, such as 15W-30, believe that the meaning of this string of letters puzzles many people, in which the letter "W" indicates winter (winter initials), and the earlier the number is that the better the low temperature fluidity of the oil is, the lower the temperature for the environment to be used for the engine at cold start. The better the ability of protection, such as 10W stands for external low temperature -25 degree C, while 20W is low temperature -15 degree C. The figure behind W represents the kinematic viscosity of the oil at 100 degrees. The higher the value, the higher the viscosity. 40 stands for 100 degrees Celsius and the kinematic viscosity standard is between 12.5mm2/s and 16.3mm2/s, which is definitely not what some folklores say can be used at 40 degrees Celsius.
Do you see this is still a little dizzy, no matter, this knowledge is for everyone to learn, I can say more popular, in the northeast, Xinjiang, Tibet, the proposed use of relatively sparse anti low temperature 5W series of oil, very cold areas such as the north and south polar regions, engine oil will even use the 0W series. Yes. In North China, East China and Southern China, it is recommended to use normal 5W-30/40 or 10W-30/40 motor oil. In this extremely hot area of Hainan, it is recommended that 40 or 50 of the engine oil be used. High temperature resistance is essential.
According to the needs of their own area to buy the appropriate oil can be, there is no need to buy too marked oil.
The more the oil is added, the better?
Every now and then I hear people say to me to add more oil when they change the oil for the excavator. My excavator burns a little more oil, so I don't have to add it myself.
So how much should you add to the oil each time? And the more the better, the better?
In general, a table is attached to the glass or door of the cab of the excavator. On this table, the amount of oil is added to the engine. We can use this amount of oil.
In addition, the excavator engine has an organic oil scale, and when the oil is added as little as possible many times, add some to wait one minute or so to pull out the oil ruler and see if the current position of the machine is between the scale line of the oil scale. Yes.
So what's the harm of adding too much oil?
Too much oil will reduce the output power of the engine. When the engine is working, the crankshaft and the connecting rod will move rapidly. When there is too much oil, the crankshaft and the connecting rod will agitate violently. The crankshaft and connecting rod oil will consume a certain amount of energy, which will inevitably lead to a reduction in engine output power, but also increase a certain amount of fuel consumption.
Too much oil is easy to damage oil seal and cause oil leakage. When the engine oil is too much, the pressure of the oil in the engine will rise, which will impact the oil seal greatly, shorten the service life of the oil seal and cause the oil leakage of the engine.
