It is quite problematic to buy original spare parts, now there are a lot of fakes and counterfeits, including from China. Even in specialized stores, there is a large proportion of "left" spare parts. Passenger cars are still half-and-half operated on such parts, and for serious cars - trucks, tractors and other special equipment, high-quality original parts are required.
Most of the Russian heavy trucks have Yumz, Zmz engine or KAMAZ. Purchase, spare parts for which are best in specialized organizations that directly cooperate with the manufacturer. Thus, you can save money and avoid losses from equipment downtime. This is especially true for such critical components and assemblies as the engine, transmission, hydraulics.
Bearings play an important role - a high-quality bearing will last a long time, and a counterfeit one will immediately fail, while it takes a lot of time to replace it. Consumables - filters, brake pads, fuels and lubricants, candles, nozzles and other spare parts must also be purchased from specialized companies or directly from the manufacturer. The quality of these materials directly affects the performance of the engine and the remaining time before overhaul.
It is quite easy to distinguish an original from a fake, most of the parts have a serial number, marking or a special stamp from the manufacturer. You also need to pay attention to the quality of machining, weight and material of the product. Many spare parts of the original type have packaging and a product passport. By purchasing high-quality parts, you can significantly extend the service life of a technical device.