The function of the lubricating oil cooler is to cool the lubricating oil and keep the oil temperature within the normal operating range.The oil cooler must be installed on the high-power reinforced engine because of the large heat load.When the engine is running, the lubrication capacity is reduced because the oil viscosity becomes thinner as the temperature rises.Therefore, some engines are equipped with lubricating oil cooler, its role is to reduce the oil temperature, maintain a certain viscosity of the lubricating oil.The lubricating oil cooler is arranged in the circulating oil circuit of the lubricating system.