1. Due to the natural wear of parts and other factors, the power and economy of the diesel engine will gradually decrease during long-term operation, so the power of the diesel engine should be appropriately reserved when the TEREX spare parts are matched, so as to give full play to its benefits. The power reduction caused by high altitude and low air pressure should also be considered in plateau areas

2. The level of "serialization, standardization and generalization" of diesel engines should be considered. For diesel engines with high degree of "three modernizations", it is very convenient to replace the general Terex accessories, TEREX spare parts and vulnerable parts, and repair them. The supply of Terex accessories, TEREX spare parts and accessories is sufficient, so we should try to select series products.

3. Service life and working reliability of diesel engine. Due to the poor use and maintenance conditions in rural areas, diesel engines that can operate reliably for a long time should be selected instead of being divorced from reality and simply pursuing advanced indicators.

4. Purpose of diesel engine. For machinery that starts frequently and moves frequently, such as tractors, agricultural vehicles, mobile power stations, etc., light high-speed diesel engines can be selected; For fixed power devices, such as agricultural drainage and irrigation, agricultural by-product processing machinery supporting power, the diesel engine with low speed and high potential can be selected. At the same time, for agricultural power, most of them operate continuously for a long time, so good economy is very important.