1, the machine must be affixed with a diamond-shaped "agricultural machinery promotion license sub-certificate" or pass the quality certification of agricultural machinery products, that is, CAM certification. The certificate is issued by the agricultural machinery test and appraisal station of the Ministry of Agriculture to inspect the production conditions of the production enterprises, review the technical documents of the enterprises, and pass the quality inspection of the products of the enterprises. The validity period is five years. This sign is actually a sign of product quality. Users are advised to give priority to products with agricultural extension license or CAM certification from the Ministry of Agriculture when purchasing tractors. If there is no ministerial agricultural extension license, provincial products can also be considered. If there is no extension license, users are advised not to buy them because the quality of these products cannot be verified.

2. Look for the name, address and trademark of the factory. As mentioned earlier, because there are many domestic tractor manufacturers, especially small tractors, the words "Changzhou, China" and "Weifang, China" are flooding the market. In this case, users should not be confused by this appearance, but make a comparative choice. If there is only a vague "China Jiangsu" or only an English nameplate, you should choose carefully.

3. Look at the date of production. Don't underestimate this date. First, because there are rubber and plastic products such as tires and oil seals on tractors, these products will age over time; Second, tractors will be improved according to the market, and the closer the date, the more reliable the product should be. Users will generally choose some tractors with similar production years.

Look at the appearance of the tractor. See whether the paint is beautiful, the appearance should be smooth and level, and there should be no sand holes, cracks or burrs, rust, three leaks and other phenomena, and whether the tire quality meets the requirements, and there should be no bulging and cracking. Whether the parts are defective.

4. Touch the joint of the box to see if there is oil leakage in the seal.

5. Check the starting performance of diesel engine, throttle control system and idle running of diesel engine. After the diesel engine is started, it should run freely, smoothly and without noise, and the exhaust gas should be colorless, transparent or light gray.

6, check the gearbox, check the free travel and steering performance of the steering wheel, check the braking system, hydraulic system, check the tires, check the lighting system. The trial operation of tractor chassis includes whether the steering operation is light and flexible, whether the braking is easy, stable, safe and reliable, whether the clutch and gearbox work normally, whether there is heavy friction and other abnormal sounds when the gearbox is engaged, and whether the hydraulic system is in good performance, convenient and flexible, and no leakage, so as to ensure the reliability of tractor performance.

7. After purchasing the machine, check whether the attached accessories are complete. The attached tool box generally includes a small number of diesel engine wearing parts and random maintenance tools, as well as the essential instruction manual and parts atlas for use and maintenance.

8. Seek "one ticket and two certificates", one ticket is the sales invoice, and the second certificate refers to the product certificate and the three-guarantee certificate, which is an important certificate of the Provisions on the Responsibility for the Return, Replacement and Repair of Agricultural Machinery Products (commonly known as the three guarantees) promulgated by the State Economic and Trade Commission and other six ministries and commissions.

9. Ask for instructions. According to the instructions, carefully carry out the necessary maintenance, maintenance and operation.