1. When purchasing new parts, pay attention to the quality of parts and identify fake and defective products; carefully check whether the parts have defects such as rust, cracks, deformation, etc., and whether the surface size meets the requirements.
2, the surface of the new accessories anti-rust paint should be cleaned before assembly, especially the precision parts should pay attention to avoid accidents.
3. The deformed products are not universal. Some diesel engine factories produce the same type of deformed products, and their parts are not universal.
4. Some fittings should be replaced in pairs. If the gear is replaced, it is not only necessary to replace one of the more severely worn ones; when replacing the double row of sleeve roller chains in the transmission case, the main and driven sprocket should also be replaced in pairs; when replacing the cylinder liner, the piston should be replaced at the same time. Piston ring.
5. The same type of standard parts and enlarged parts are not common. Manufacturers will produce large-size spare parts for users to choose when repairing. Therefore, when purchasing accessories, it must be determined whether the purchased parts are standard parts or enlarged parts. For standard parts, the journal can only be equipped with standard crankshafts. Otherwise, the machining amount is large when scraping the bushings, which wastes time and does not guarantee the repair quality, and greatly reduces the service life.
6. When replacing new parts, the new parts should be identical to the old ones. When some operators replace the new injectors, they do not pay attention to the original nozzle specifications. They often miss the needle valve counterparts. If it is light, it will be difficult to start, and if it is heavy, it will kill the injectors.
7, must pay attention to the direction of installation. Some parts have directionality. If you don't pay attention, it will cause difficulty in starting and even damage the machine after installation. (诗é’)