What is the reason for the high temperature of Longgong 855b loader?

There may be a problem with the engine superheated water cooling system. Water cooling system is generally composed of radiator, thermostat, water pump, waterway and fan. (1) Too much scale in water tank and engine water jacket will also cause poor heat dissipation and increase water temperature. Clean the waterway if necessary. Clean the waterway, remove the thermostat and flange, and check whether the thin water pipe at the return pipe-throttle body-expansion water tank on the cylinder head is unblocked. If it is not unblocked, try to deal with it. The outside of the water tank is dirty or the air conditioner condenser and the water tank are blocked. , resulting in poor heat dissipation of the water tank and high water temperature. Clean up if necessary. To clean the radiator, first remove it, spray the surface with the external cleaning agent of the engine several times, rinse it with clean water after a few minutes, and dry it with a high-pressure air gun. The outer surface of the condenser is also immediately cleaned with external cleaning agent. (2) The thermostat is damaged and can't be opened, so that the coolant can't smoothly enter the water tank to form a large cycle, and the water temperature rises rapidly, leading to boiling. The thermostat decides whether to adopt "cold cycle" or "normal cycle". The thermostat opens when the water temperature rises, and the higher the temperature, the greater the opening. If the thermostat is not closed, the cycle will enter the "normal cycle" from the beginning, resulting in the engine not reaching the normal temperature as soon as possible. The thermostat can't be opened or it can't be opened flexibly, which will make the coolant unable to circulate through the radiator, which will cause the temperature to be too high or too high. When the thermostat can't be opened, the temperature and pressure of the upper and lower pipes of the radiator will be different. At the working temperature, the main valve of the thermostat is not open enough or can't be opened, which leads to the water in the cooling system not entering the radiator (large circulation). In order to ensure that the engine can reach the normal working temperature as soon as possible after starting, the engine adopts a thermostat to automatically control the circulation of cooling water. When starting in the morning, the cooling water temperature is lower than the normal working temperature, and it is hoped that the water temperature will rise as soon as possible. In this way, the main valve of the thermostat is closed and the auxiliary valve is opened, so that the circulating cooling water does not have to flow through the radiator to dissipate heat, and the temperature of the cooling water is accelerated. The circulating route of cooling water is: water pump → water jacket → water pump. When the temperature is higher than the normal working temperature, I hope that the water temperature can be reduced to normal temperature at this time, so I close the auxiliary valve of the thermostat and open the main valve to let the circulating cooling water flow through the radiator to dissipate heat. The circulating route of cooling water is: water pump → water jacket → radiator → water pump. Therefore, if the thermostat is damaged, the cooling water can't flow through the radiator to dissipate heat through large circulation, which leads to the high water temperature in the engine cooling system. (3) The water pump is damaged or the transmission belt slips, resulting in poor water pump. The pump can't rotate normally to generate enough water pressure, which will also reduce the flow of cooling water. Because the circulating flow of cooling water exerts water pressure through the water pump, the water pressure cooled by the radiator enters the engine water jacket, forcing the cooling water that absorbs heat to flow to the radiator to dissipate heat. If the water pump does not work well, the water pressure is not high, the circulating flow of cooling water is reduced, and the heat dissipation effect is not obvious, resulting in high water temperature in the cooling system. The water pump is damaged, and the coolant can't be sent to the water tank, resulting in poor circulation of coolant and high water temperature until the pot is boiled. Need to repair or replace a new water pump. When replacing the timing belt, be sure to check the water pump for signs of leakage. If there is leakage, please replace it. Please carefully check one side of the timing belt for signs of water leakage. For vehicles with mileage exceeding1.2000 km, the owner is advised to replace the water pump when replacing the timing belt. For vehicles with long mileage, the shaft and blades are easy to separate, so we must pay attention to maintenance. (4) Insufficient antifreeze and too little coolant will also cause the water temperature to be too high, so it is necessary to add or replace the coolant in time. Due to the irregular addition and replacement of antifreeze, the engine water channel and water tank will be blocked in advance, resulting in excessive water temperature. Antifreeze should be replaced once every two years, and original fittings must be used when replacing and adding. If the concentration is too high, the heat dissipation effect will be poor and the engine will overheat. This harm is not obvious when the engine is running at low load, and the coolant temperature will be too high when it is running at high load and high speed. Therefore, it is not allowed to add antifreeze solution at will, and the concentration must be detected first. Different kinds of antifreeze cannot be mixed for use, so as not to cause chemical reaction, produce precipitation or bubbles, and reduce the use effect; When replacing antifreeze, start the engine first, then stop the engine and release the cleaning liquid. Add clean water to the cooling system, idle for 10 minute, then drain water, and repeat several times until clear water flows out of the waterway, and then add new antifreeze and water. (5) There is air in the cooling system, which causes the cooling water not to circulate normally. (6) The cylinder gasket is damaged, which causes the high temperature and high pressure gas in the cylinder to enter the cooling system, so that the water temperature quickly rises to boiling. A new cylinder liner must be replaced. The cylinder pads of the new two valves are made of steel plates. Generally, short-term high water temperature will not burn the cylinder gasket, but it will be damaged if it is not cooled for a long time. (7) For the high water temperature of the engine, it must be checked under the condition of ensuring that all parts of the cooling system have no leakage. The water leakage part includes the three-way water pipe, water pump, water pipe joint, radiator, thermostat, cylinder gasket and liquid storage pipe cover behind the cylinder head. In the case of leakage, be sure to use a tester to pressurize after finishing and observe whether there is leakage in each part. In the cooling system, such as radiator, water pump, cylinder block, cylinder head, cylinder gasket, heater water tank, water pipe, rubber hose, drain switch, etc., there are leaks, which will reduce the circulating flow of water in the cylinder and cylinder head water jacket, reduce the heat absorption function of the cylinder, and cause the cooling water temperature to be too high.