When some agricultural machinery operators use agricultural machinery, they do not understand the maintenance techniques or some of the poor operating habits cultivated in peacetime. As a result, the agricultural machinery is damaged during use, thus reducing the service life of the agricultural machinery. First, the cumulative amount of engine oil is added. When replacing the oil, many operators replaced all the crankshaft with new oil, which caused the oil to accumulate continuously. This misunderstood that this not only ensured the lubrication needs of the diesel engine, but also saved expenses. However, after a long period of use, the engine oil has deteriorated, impurities have increased, and the quality of lubrication has declined. At this time, even if new oils are regularly added, the oil quality cannot be satisfied, resulting in accelerated wear of parts and greatly shortening the use of pistons and other mechanical parts. life. At the same time, a large amount of impurities in the oil will adhere to the wall of the oil gallery and, in severe cases, block the oil passage. Second, adjust the valve clearance at will. Most agricultural hands do not use special tools for inspection, but judge the size of the valve clearance by shaking the feeling of the valve rocker. This will affect the work of the diesel engine. The lighter fuel consumption will increase and the engine power will drop. Impact on the valve. Again, do not clean the tailpipe coke for a long time. Most operators ignore the maintenance of locomotive exhaust ducts, and do not clean the carbon deposits of the exhaust ducts for a long time. As a result, the cross-section of the exhaust ducts is narrowed and the exhaust gas is blocked, resulting in an increase in the engine oil consumption rate and a drop in power, which causes the locomotives to appear “ Overheating phenomenon. Therefore, under normal circumstances, the exhaust pipe coke should be cleaned once every quarter to ensure that the diesel exhaust is unobstructed. Finally, the new machine is put into load operation without running. After repurchasing a new machine, in addition to carrying out inspection and maintenance, it must be run in strict accordance with the commissioning procedures stipulated in the manufacturer's manual. The rotational speed should be from low to high, and the load should be light to heavy in order to eliminate the processing marks on the friction surfaces of the parts. To make it smooth.