2、 Don't change the lubricating oil and don't clean the oil passage. Many farm operators lack common sense of maintenance or are lazy. They don't clean the oil passage when changing the lubricating oil and bury hidden dangers for themselves. You should know that after the lubricating oil is used, there are many mechanical impurities in the oil. Even if the lubricating oil is exhausted, there are still impurities in the oil pan and oil circuit. Especially for new or overhauled locomotives, there are more impurities after trial operation. If they are not cleaned, they will be put into use in a hurry, which will easily cause accidents such as tile burning and axle holding.

3、 Don't choose lubricating oil according to season. Many farm operators don't pay attention to choosing lubricating oil according to season. They use summer lubricating oil in winter and winter lubricating oil in summer. No matter what the quality is, they buy it cheaply. As a result, it is difficult to start the locomotive and burn the bearing bush. It is hoped that the agricultural machinery hand should choose the lubricating oil which has passed the quality inspection and is suitable for the temperature label.

4、 Avoid installing the piston, use open fire to heat the piston, the thickness of each part of the piston is uneven, the degree of thermal expansion and cold contraction is different, which easily causes deformation. If the piston is heated by open fire to a certain high temperature, the metal structure will be damaged and the wear resistance will be reduced after natural cooling, and its service life will be greatly shortened.

5、 Avoid applying butter when installing the cylinder gasket. Many farm machinery operators are used to applying butter when installing the cylinder gasket. They think that this can increase the tightness of the cylinder, but they don't know that this is just the opposite. Due to the partial loss of butter in case of high temperature, there is a gap between the cylinder pad, cylinder head and the plane of the engine body. High temperature and high pressure gas is easy to impact from this place, damaging the cylinder pad and causing air leakage. In addition, when the butter is at high temperature for a long time, it will produce carbon deposit, resulting in premature aging and deterioration of the cylinder gasket.

6、 Don't put the throttle at the maximum oil supply position. When some farm operators start the locomotive, they are used to putting the throttle at the maximum oil supply position. As a result, there is too much fuel injected into the cylinder and the mixture is too rich, so it is difficult to start. Throttle scientific positioning is: when the temperature is above 15 ℃, slightly higher than idle. When the temperature is below 15 ℃, the crankshaft should be idled for several circles at the beginning. When you feel relaxed, you can start it with a small throttle. In addition, do not blow the throttle, so as not to cause cylinder and other parts to accumulate carbon, or cause connecting rod bending, crankshaft fracture and other unexpected faults due to high and low speed, uneven mixing of fuel and air.

7、 Don't seriously check and maintain the new car. Some young farm machinery operators mistakenly think that with the development of science and technology, the safety performance of the current locomotive is very reliable, so they don't seriously check and maintain the new car except for the running in test run. As a result, problems frequently appear and they regret it. The inspection and maintenance methods are: (1) check whether there is oil in the oil pan of the three-stage air filter. (2) Check the fastening of bolts. (3) Check and adjust the injection pressure. (4) Change the oil in the oil pan and clean the oil pan and lubricating oil circuit.

8、 Avoid water tank "boiling" suddenly add cold water, most agricultural operators know, engine overload operation, water shortage, heat dissipation is not good will make water tank "boiling", if suddenly add cold water, because the temperature is too high, will lead to cylinder head and cylinder "crack". Therefore, once the water tank of agricultural machinery hand is found "boiling", emergency measures should be taken to ensure that the engine cooling water is cooled by itself.

9、 Don't speed up the improvement of labor efficiency. Some agricultural machinery operators think that speed up can improve labor efficiency, but they don't know that it is closely related to the amount of fuel consumption. The practice shows that when the locomotive accelerates from starting to medium speed (30 km / h), the fuel consumption of rapid acceleration (25 seconds) is about twice that of slow acceleration (40-45 seconds), which is due to incomplete fuel combustion during rapid acceleration. The more frequent you start, the greater the difference in fuel consumption. There is no benefit in speeding up. Therefore, it is hoped that agricultural machinery operators will start at low gear and then accelerate slowly.

10、 Avoid replacing brake oil and gear oil with engine oil. In practice, it is quite common for some agricultural machinery operators to replace brake oil and gear oil with engine oil, resulting in various accidents. It should be known that brake oil is the medium for transmitting pressure of locomotive hydraulic braking system. The main components are castor oil and alcohols. It has good solubility, is not easy to precipitate and has no corrosion. It contacts with rubber body and has small expansion rate of rubber body. The oil does not have these excellent characteristics. If it is replaced by oil, it is easy to produce precipitation and make the rubber parts of the brake system expand, which easily leads to brake failure. Compared with gear oil, engine oil has low viscosity, low compression, wear resistance and load resistance. If the gear oil is replaced by engine oil, the transmission gear is not easy to wear oil film, and the lubrication effect becomes worse, which will cause the early wear of the transmission gear, resulting in the effective performance of the components, and the harm degree can not be estimated.