1. New or overhauled tractors are not strictly in accordance with the provisions of the run-in (trial operation), even without the idling operation, they are eager to put into production use, so that the contact parts do not get the desired contact and lubrication conditions, so that The wear of the parts is severe, and scratching or mutual seizure may occur, resulting in accelerated scrapping of parts. 2. The technical maintenance of the tractor is not taken seriously. Many pilots do not have sufficient knowledge of the technical maintenance of tractors and do not actively perform maintenance on schedule. Many operators have low technical skills and do not know how to perform technical maintenance, so that some hidden troubles cannot be eliminated in time, resulting in failures and reducing parts. The service life. 3. The use of oil is not standardized. All kinds of oil must be kept clean. If you often use unclean oil, you can't guarantee the technical state of the engine is good. In addition, oils of different brands are often used. In particular, the use of kerosene and other oils instead of fuel oil (diesel) has a greater impact on the service life of the engine. 4. Severe overload. According to the investigation, the load of the tractor greatly exceeds the prescribed amount. Generally overloaded more than 1 times, and some even overloaded more than 3 times. Due to long-term overloading of the tractor, the tractor accelerates the wear of the components and its service life must be greatly reduced. 5. Blindly change speed. In particular, some small-scale tractors are 1-2 times faster in speed change. Due to the increased rotational speed, the original design of mechanical stress is damaged. The strength of the parts is limited. After the speed change, the wear of the parts is intensified, and the scrap rate of the parts will follow. Increased.
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