1, clever use of lubricant material. In order to ensure the temperature, lubrication and normal operation of the parts, the 11th diesel engine lubricating oil should be preferred in summer, and the 14th diesel engine lubricating oil should be selected in Jiangnan area, and the 30th gear oil should be used for the transmission and the rear axle. When replacing the gear oil, the crude oil should be drained and cleaned before putting in new gear oil. 2, keep the tank clean. If there is more rain in summer, if the water tank is not wiped clean after rain, dust and oil will quickly become contaminated, making it difficult to dissipate heat from water tanks and water jackets, and the accumulation of scale inside the radiator can easily lead to damage to the cylinder. Therefore, attention should always be paid to the cleaning of the tank and the outside of the radiator. 3, check the cooling system in time. In daily work, the cooling water should be sufficient and the fan belt tightness should be appropriate. The thermostat and water temperature meter should be checked and maintained in time. Found that the tank "open pot" should stop in time, idling temperature, can not suddenly join the cold water. 4. Beware of interruption of fuel supply. High temperatures can cause air resistance in the oil supply system, resulting in insufficient oil supply or interruption. For this purpose, the hand oil pump oil is used before start-up, the air in the oil circuit is eliminated, and the ventilation in the engine hood is ensured, and heat insulation measures are taken for the heated part of the oil circuit. In addition, the oil supply system should use standard No. 0 diesel oil and periodically precipitate to release the lower water. 5, timely adjustment of battery fluid. The battery electrolytic density is adjusted from 1.28 to 1.29 for winter use to 1.25 to 1.26 for summer use; electrolyte surface height is checked every 8 to 10 days. The liquid level should be higher than the plate 10---15. Millimeters, additional shortage of distilled water; appropriate to reduce the generator's charge flow to prevent the battery from overcharging; to prevent the battery cover vent hole was blocked by the electrolyte blocking, causing the battery to explode. 6, hot car slow cooling. Hot weather in summer, hot road surface, combined with large body loads, such as poor maintenance, it is prone to cylinder cracking, tire inflation and so on. Therefore, in addition to not having enough excess fetal gas in summer, you should also perform slow cooling. The hot car can be parked in the shade and cool, or the cooling equipment can be added in the garage. In addition, the paint remover shall be rusted and painted or greased with rust. The tank should be filled with water to prevent rust inside the radiator.