First, the impact of the load on the technical status of the tractor Once the tractor overloads, the wear rate of the parts increases rapidly. Because of the overload, the work load of each assembly increases, the working state is unstable, the engine is under high load and operates under unstable conditions, resulting in cooling water temperature and excessive oil temperature in the crankcase, which will increase engine wear. Second, the choice of fuel and the impact of fuel quality 1. The influence of the choice of fuel on the technical conditions Because the temperature in northern China has changed greatly year after year, the winter time in the year is longer, the temperature is lower, and the seasons change quickly. Therefore, for the choice of fuel, different grades of fuel must be used according to the different local temperatures. Otherwise, Will directly affect the engine's power performance and job reliability. 2. The impact of fuel quality The quality of diesel oil has a great influence on the wear of engine parts. For example, too much heavy distillate in diesel fuel causes incomplete combustion and the formation of carbon deposits. As a result, the wear of the cylinder increases, and at the same time, the nozzle is easily clogged and the engine work is damaged. The viscosity of the diesel fuel also affects the injection pump plunger. When the viscosity is too low, the lubricating effect of the diesel fuel is reduced and the wear of the plunger coupling is accelerated. The cetane number of diesel fuel affects the startability and smoothness of the engine. Improper selection will make it difficult to start and make the work rough. The rough work will increase the impact load of the engine and aggravate the wear of the parts. When the sulphur content in diesel oil increases by 0.1% to 0.5%, the wear volume of diesel engine cylinders and piston rings will increase by 20% to 25%. The copper-lead alloy bearings of diesel engines will also accelerate erosion. Therefore, the national regulations stipulates the sulphur content of diesel oil. Must not exceed 0.1%. Third, the impact of lubrication material quality 1. Engine oil: The effect of engine oil quality on engine wear is related to its viscosity, viscosity temperature, and oxidation resistance. If the viscosity of the oil is too large, the fluidity is poor. When the engine is started at a low temperature, the friction surface is not easily reached, the lubrication condition is deteriorated, and the engine wear is accelerated; if the viscosity is too low, the oil pressure of the lubrication system is too low and the oil supply is insufficient. The formation of a reliable oil film, prone to semi-dry friction, will also accelerate the engine wear. When the oil's anti-oxidation performance is poor, it will gradually degenerate during use, forming precipitates, carbon deposits, and paint films. Precipitation will affect the ability of the oil to pass through the lubrication system, that is, it can easily block the oil passages, tubing, and filters, and damage the normal operation of the lubrication system. Coke is a poor conductor of heat. If the top of the combustion chamber or piston is covered with coke, parts will overheat and the engine will burn abnormally. The paint film will adhere to the piston ring, reducing its elasticity and mobility, and even causing the piston ring to jam and scratch the cylinder. 2. Grease: When using grease lubrication, pay attention to the reasonable choice of different brands of grease, can not be abused. At the same time should pay attention to cleaning, can not be mixed with dust, sand or metal debris and other debris, to prevent increased wear and tear, reduce the lubrication of grease. Fourth, the impact of parts quality The part quality refers to the rationality of the part structure design, the quality of the parts selection, and the quality of the parts. This is the basis for the service life of the parts. Modern tractors have made careful considerations in the rationality of the design of the part structure, and strive to adopt the latest technology in the manufacturing process in order to continuously improve the processing quality. For materials selection, the hardness, strength and wear resistance of the material are taken into consideration. However, in the real life, due to the breaking of the planned economic model, the original unified management of the material department is no longer the only source of parts. Currently, there are many agricultural machinery parts shops in the market, and the channels for the purchase of goods are not the same, so there must be part quality. The emergence of discrepancies and counterfeit products is one of the most important factors affecting the state of tractor technology. Fifth, the impact of driving technology The driver is the main operator of the tractor. The difference between the driving level and the driving technology, and whether the driving is carried out according to the operating rules, is directly related to the service life of the parts. The correct method of operation should be: cold shaking, warming up, timely shifting, light stepping slow lift, grasp the temperature, to avoid dust and so on. This is an effective way to extend the life of the tractor. When driving, pay attention to whether the working temperature of the engine is normal, whether the lubrication condition is good, the shifting is light, and the impact load is reduced. Therefore, the driver's technical training and safety education should be persistent, and then continue to improve the driver's driving level. This is also an important way to slow the deterioration of tractor technology. Six, the impact of maintenance quality Maintaining the tractor in time is the key to reducing the wear of parts and extending the service life of the tractor. According to the maintenance cycle, work items and technical requirements, regular adjustment, tightening, inspection, lubrication, timely troubleshooting, etc., can not only maintain the tractor's intact technical condition, but also reduce the wear of parts and prolong the service life of the tractor. In summary, there are many aspects that affect the deterioration of tractor technology. However, as long as scientific methods are used to guide and understand the laws and causes of deterioration of technical conditions, it will slow down the time and cycle of deterioration of its technical conditions, extend the service life of tractors, and increase the reliability and safety of tractors. 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Factors that affect the deterioration of tractor technology