Some agricultural machinery operators believe that it is very simple to repair and replace parts of agricultural machinery, and just install the updated parts. In fact, if the new parts are not assembled properly, the power of agricultural machinery will decrease, the fuel consumption will increase, and it will be difficult to start; If it is serious, the machine will be damaged. Therefore, pay attention to the following points when purchasing new parts.

1. Pay attention to the quality of Cultivation parts when purchasing new parts. Do not buy fake and inferior products, and carefully check whether the parts have rust spots, cracks, deformation and other defects, and whether the surface size meets the requirements.

2. Before assembly, the antirust coating on the surface of new accessories shall be removed. In particular, attention should be paid to precision coupling parts to avoid potential accidents.

3. Some mating parts should be replaced in pairs. For example, when replacing the gear, you can't only replace the one with serious wear. When replacing the double row sleeve roller chain in the transmission box, you should also replace the driving and driven sprockets in pairs; When replacing the cylinder liner, replace the piston and piston ring at the same time.

4. Standard parts and enlarged parts of the same model are not common. The manufacturer will produce enlarged spare parts for users to choose when repairing. Therefore, when purchasing accessories, it must be determined whether the purchased accessories are standard parts or enlarged parts. For example, the journal can only be equipped with standard curved bearing shells. Otherwise, there will be a large amount of processing when scraping the bearing shells, which will not only waste time, but also can not ensure the repair quality, but also greatly reduce the service life of accessories.

5. When replacing new parts, the models of new parts and old parts should be exactly the same. When some operators replace the new fuel injection nozzle, they do not pay attention to the specification and model of the original fuel injection nozzle and buy the needle valve coupling parts by mistake, which often leads to the consequences of difficult starting and stuck fuel injection nozzle.

6. Attention must be paid to directionality during installation. Some parts are directional. If they are installed incorrectly, it will be difficult to start and even damage the parts.