What if the tractor is hot?

What if the tractor is hot? Maybe the water tank is blocked. Let the car stop to work, idle for a while, add water, and wait until the water temperature drops before working. Open the water tank slowly, or it will stick to the tank when the temperature is high.

How to deal with the high temperature of tractor and how to solve the high engine temperature is a common problem of tractor. The optimum working temperature of the engine is 80℃ to 90℃. If the temperature is too high, the mechanical strength of tractor will decrease, the moving parts will stick due to thermal expansion, the lubricating oil will fail, and the charging efficiency of combustion chamber will decrease. Therefore, it is necessary to analyze the causes of tractor engine high temperature failure and reduce engine failure.

1 Engine cooling system failure leads to high engine temperature.

When the engine works, the instantaneous temperature can reach 3000℃, which requires a powerful cooling system to cool it in time. If the cooling system fails, the engine will be damaged by high temperature. In the past, small horsepower tractors usually used natural evaporative cooling, but now large horsepower tractors use forced water cooling. Although the forced water cooling system has a good cooling effect, its structure is also complicated, so it is more and more common that the engine temperature is high due to the failure of the cooling system.

The water cooling system of tractor mainly includes water pump, radiator, fan, water jacket, thermostat, shutter, water pipe and water thermometer. When the water cooling system works, if the temperature of the coolant is lower than the initial temperature of the thermostat, the coolant starts from the water pump to cool the engine block, reaches the engine cylinder head through the waterway, and then flows back to the water pump through the thermostat at the front end of the cylinder head. This process is called a small cycle. When the temperature of the coolant is higher than the full-open temperature of the thermostat, the coolant will start to cool the engine block from the water pump, then flow into the radiator through the thermostat and then return to the water pump. This process is called macrocycle. If the temperature is above the opening temperature of the thermostat, but it does not reach the full-open temperature, a part of the cooling water will directly flow back to the water pump, and a part will flow back to the water pump after being radiated by the radiator. This process can be called mixed cycle. Large loop and small loop are the basic working modes of water cooling system to cool the engine, and cooling system failures usually occur in these two links.

Problems related to 1. 1 refrigerant

Insufficient refrigerant, low liquid level or poor quality will lead to high engine temperature, so it is necessary to add refrigerant in time when using tractor. It is best not to use antifreeze instead of antifreeze, which is corrosive and has a boiling point of about 90℃, which may easily cause the engine to overheat. Slow flow of frozen liquid can also lead to slow heat dissipation, which is usually due to problems with the water pump or air resistance of the cooling system. At this time, you can alternately perform low engine speed and high engine speed to see if the water in the water tank is shaking. If it is not shaking, it proves that the water pump is out of order. If there is nothing wrong with the water pump, you can let the engine run at high speed, gently unscrew the water tank, and the gas will flow out with the cooling liquid, and this will be repeated many times until the temperature of the upper and lower pipes is obviously different after the gas is discharged, and then the cooling liquid will be replenished. In addition, with the increase of tractor service time, the rubber falling off the upper and lower walls of the circulating water pipe will also block the water circulation system, resulting in the slow flow of frozen liquid. Excessive scale in the water cooling system will also reduce the heat transfer efficiency, resulting in excessive engine temperature. In order to reduce the formation of scale, special freezing liquid can be used, and softened water can be used if it is not available. In practical use, water quality can be softened by boiling and adding softener.

1.2 radiator failure

The surface of the radiator is easily blocked by sludge, so the exchange area with the intake air is reduced, resulting in high temperature of the frozen liquid. Therefore, when the tractor is not used, compressed air should be blown from behind the radiator and washed with low-pressure water to remove impurities. In addition, with the increase of service time, the mechanical damage increases, and the radiator fins will be deformed and adhered, which also reduces the heat exchange with cold air, resulting in poor heat dissipation of the engine. In this case, thin steel sheets can be used to separate the adhered fins, or pipes with good heat dissipation can be used to bring water tanks. Some tractors use river water as coolant. Because there are many impurities in the river, the sediment in the water may attach to the core tube of the radiator, causing the core tube to be blocked. In this case, the temperature difference between the upper part and the lower part of the core tube is obvious. If the core pipe is blocked, the radiator should be removed, washed with 5% to 65,438+00% soda water at 80℃ to 90℃, then dredged with steel wire, and finally washed with hot water.

1.3 thermostat failure

Usually, the thermostat can't be opened, and the coolant can't flow into the radiator in time, which leads to the engine heating. At this time, the temperature difference between the upper pipe and the lower pipe will be great. The driver can remove the thermostat and heat it in water to see if the opening temperature and full opening temperature of the thermostat are normal. If the temperature drops below 82℃ after stopping heating, but the thermostat is still not closed, it can be determined that the thermostat is faulty. If the thermostat cannot be turned off during driving, turn off the engine and wait for it to cool before walking for a while or directly remove the thermostat.

1.4 ventilation is weakened

Forced water-cooled engines generally use fans to suck air to cool the coolant in the radiator. After the hood of the tractor is closed, a closed space is formed, and the air sucked by the fan exchanges with the radiator core, resulting in hot air backflow when the temperature rises, and the air sucked by the fan is also hot, resulting in the high temperature of the engine. After the tractor is used for a period of time, air passages appear around the water tank, and the air passing through the water tank decreases accordingly, which will also lead to the increase of engine temperature. In this case, a new insulation sponge should be installed and a hole should be punched in the ventilation side door to increase the ventilation volume.

1.5 fan belt and fan failure

The tightness of the fan belt will also affect the normal operation of the cooling system. Too tight fan belt can improve the cooling effect, but if the fan belt is too tight, it will increase the load and wear of bearings. This will not only bend the pump shaft, but also deform and damage the belt. Therefore, the tightness of the fan belt should be checked regularly. In actual operation, you can press the fan belt by hand. It is normal for the belt to sag within10 mm. If the belt is loose, it should be further inspected to prevent slipping. Because the fan is a very important heat dissipation device, it should be checked regularly whether its blades are damaged and deformed, whether they are installed backwards and whether the outer diameter is appropriate. If there is any problem, then rule it out. For tractors using electromagnetic fans, check whether the circuit is connected.

Cooler failure in 1.6

At present, in order to reduce fuel consumption and meet emission requirements, many large tractors also use turbocharged engines, so higher requirements are put forward for the cooling system. The intercooler is generally installed in front of the engine, and its main purpose is to reduce the temperature of exhaust gas entering the combustion chamber and improve the engine power. If the intercooler fails, it is easy to cause the engine combustion temperature to be too high, leading to knocking and other failures. Therefore, the intercooler should be cleaned regularly.

2 Abnormal engine operation leads to high engine temperature.

2. 1 Fuel supply advance angle of diesel engine is not allowed.

Incorrect fuel supply advance angle will not only cause the engine temperature to be too high, but also cause difficulties in starting and black smoke from the exhaust pipe, so it is necessary to readjust the fuel injection timing to reach the standard value. Whether the fuel supply advance angle is ahead or behind, it will lead to incomplete combustion, so the contact time between high-temperature gas and cylinder wall is longer, the area increases, more heat is generated, and the temperature of coolant rises rapidly, which can not cool the engine in time.

2. 1 Insufficient intake and exhaust pipes.

The engine will produce a lot of carbon deposits due to poor combustion of the engine, and these carbon deposits will accumulate in the muffler. Poor muffler will further lead to poor exhaust. In addition, if there is a collision sound between the valve and the rocker arm, it may be that the gap of the exhaust valve is relatively large, and the exhaust valve opens late and the exhaust time is short, resulting in poor exhaust. If the exhaust is not smooth, the heat inside the tractor cannot be dissipated in time, and the temperature of the refrigerant will naturally rise, thus causing serious damage to the engine. Therefore, when the engine has high temperature problems, the muffler should be inspected in time, and other reasons should be analyzed after such failures are eliminated. The air inlet of air filter element and air cleaner is easy to be blocked, and the connecting pipeline between the engine air inlet and turbocharger is easy to be damaged, which will lead to insufficient air intake and insufficient fuel combustion, which will increase the engine temperature and emit black smoke.

2.3 Engine damage

When the engine is hot, the engine power is reduced and the waste is too large, so excessive wear of the cylinder liner may occur. Excessive wear of bearing bush should be considered when the engine is overheated and there is knocking sound, and the oil temperature rises rapidly but the oil pressure drops obviously. After the cylinder liner, bearing bush and other parts are excessively worn, heat will also be generated when the machine is running, and the temperature will rise after the coolant accumulates to a certain extent. If the cylinder gasket is damaged, high-pressure gas will enter the cooling system, and the cooling water will boil under high pressure, so once the engine is overheated, it is necessary to consider whether the cylinder gasket is damaged. In actual operation, the engine can be turned off for a moment, and when it is restarted, the engine speed can be increased and the water filling cover of the water tank can be opened. If there are a lot of bubbles and small water droplets in the exhaust pipe, it can be judged that the cylinder gasket is broken, and a new one should be replaced in time [3]. In addition, long-term overload operation will also lead to high engine temperature, so try to work normally and protect the tractor engine.

What should Shanghai 50 tractor do at high temperature? Check the oil pump or replace the large fan blades to reduce the load of gas distribution time and valve clearance and clean the water tank.

How to solve the tractor high temperature? The normal water temperature of the engine is 70-95 degrees Celsius. If the water temperature exceeds 95 degrees Celsius, the engine block will easily expand and deform, and it will not work normally, and the lubricating oil will become thinner and worse, resulting in poor lubrication. The air intake of the engine cylinder decreases and the engine power decreases.

The water temperature is too high. Besides the overheating of diesel engine, there are other reasons for the cooling system:

Insufficient cooling water, not adding water in time.

The fan drive belt is too loose or the fan direction is reversed.

The scale in the cooling system is blocked, resulting in poor heat dissipation.

The cooling core or shield is blocked by dust.

How to prevent tractors from overheating;

First, the driver thoroughly cleans the scale and impurities in the cooling water tank with scale remover. , to ensure the smooth circulation of cooling water. In summer, the cooling water evaporates quickly, so be sure to add clean water before driving, and always check the water level when working.

When the water temperature exceeds 95℃, it is forbidden to turn off the fire immediately, add cold water or splash it with cold water. Otherwise, the cylinder block and cylinder head are easy to burst. Run the engine at medium speed, open the radiator cover and let out hot air. When the water temperature drops to about 60℃, slowly add cooling water.

When opening the radiator cover, the driver should stand in the upwind position, and his face should not face the water inlet to avoid being scalded by high temperature steam.

Tractors should avoid working at noon. Because the temperature is too high, the radiator is easy to boil and the driver is easy to get tired. Try to arrange the operation in the morning or afternoon. Before operation, check the oil supply system to prevent oil leakage, and pay attention to fire prevention and safe production. Everyone is responsible.

High engine temperature is a common fault of tractors. The optimum working temperature of the engine is 80℃ to 90℃. If the temperature is too high, the mechanical strength of tractor will decrease, the moving parts will stick due to thermal expansion, the lubricating oil will fail, and the charging efficiency of combustion chamber will decrease. Therefore, it is necessary to analyze the causes of tractor engine high temperature failure and reduce engine failure.

Engine cooling system failure leads to high engine temperature? When the engine works, the instantaneous temperature can reach 3000℃, which requires a powerful cooling system to cool it in time. If the cooling system fails, the engine will be damaged by high temperature. In the past, small horsepower tractors usually used natural evaporative cooling, but now large horsepower tractors use forced water cooling. Although the forced water cooling system has a good cooling effect, its structure is also complicated, so it is more and more common that the engine temperature is high due to the failure of the cooling system. ? The water cooling system of tractor mainly includes water pump, radiator, fan, water jacket, thermostat, shutter, water pipe and water thermometer. When the water cooling system works, if the temperature of the coolant is lower than the initial temperature of the thermostat, the coolant starts from the water pump to cool the engine block, reaches the engine cylinder head through the waterway, and then flows back to the water pump through the thermostat at the front end of the cylinder head. This process is called a small cycle. When the temperature of the coolant is higher than the full-open temperature of the thermostat, the coolant will start to cool the engine block from the water pump, then flow into the radiator through the thermostat and then return to the water pump. This process is called macrocycle. If the temperature is above the opening temperature of the thermostat, but it does not reach the full-open temperature, a part of the cooling water will directly flow back to the water pump, and a part will flow back to the water pump after being radiated by the radiator. This process can be called mixed cycle. Large loop and small loop are the basic working modes of water cooling system to cool the engine, and cooling system failures usually occur in these two links.

Refrigerant-related problems Insufficient refrigerant, low liquid level or poor quality will lead to high engine temperature, so add refrigerant in time when using tractors. It is best not to use antifreeze instead of antifreeze, which is corrosive and has a boiling point of about 90℃, which may easily cause the engine to overheat. Slow flow of frozen liquid can also lead to slow heat dissipation, which is usually due to problems with the water pump or air resistance of the cooling system. At this time, you can alternately perform low engine speed and high engine speed to see if the water in the water tank is shaking. If it is not shaking, it proves that the water pump is out of order. If there is nothing wrong with the water pump, you can let the engine run at high speed, gently unscrew the water tank, and the gas will flow out with the cooling liquid, and this will be repeated many times until the temperature of the upper and lower pipes is obviously different after the gas is discharged, and then the cooling liquid will be replenished. In addition, with the increase of tractor service time, the rubber falling off the upper and lower walls of the circulating water pipe will also block the water circulation system, resulting in the slow flow of frozen liquid. Excessive scale in the water cooling system will also reduce the heat transfer efficiency, resulting in excessive engine temperature. In order to reduce the formation of scale, special freezing liquid can be used, and softened water can be used if it is not available. In practical use, water quality can be softened by boiling and adding softener.

When the radiator fails, the surface of the radiator is easily blocked by oil sludge, so the exchange area with the intake air decreases, which leads to the increase of the temperature of the frozen liquid. Therefore, when the tractor is not used, compressed air should be blown from behind the radiator and washed with low-pressure water to remove impurities. In addition, with the increase of service time, the mechanical damage increases, and the radiator fins will be deformed and adhered, which also reduces the heat exchange with cold air, resulting in poor heat dissipation of the engine. In this case, thin steel sheets can be used to separate the adhered fins, or pipes with good heat dissipation can be used to bring water tanks. Some tractors use river water as coolant. Because there are many impurities in the river, the sediment in the water may attach to the core tube of the radiator, causing the core tube to be blocked. In this case, the temperature difference between the upper part and the lower part of the core tube is obvious. If the core pipe is blocked, the radiator should be removed, washed with 5% to 65,438+00% soda water at 80℃ to 90℃, then dredged with steel wire, and finally washed with hot water.

Thermostat failure Usually, when the thermostat can't be opened, the coolant can't flow into the radiator in time, which causes the engine to heat up. At this time, the temperature difference between the upper pipe and the lower pipe will be great. The driver can remove the thermostat and heat it in water to see if the opening temperature and full opening temperature of the thermostat are normal. If the temperature drops below 82℃ after stopping heating, but the thermostat is still not closed, it can be determined that the thermostat is faulty. If the thermostat cannot be turned off during driving, turn off the engine and wait for it to cool before walking for a while or directly remove the thermostat.

Forced water-cooled engines with reduced ventilation generally use fans to suck air to cool the coolant in the radiator. After the hood of the tractor is closed, a closed space is formed, and the air sucked by the fan exchanges with the radiator core, which leads to the hot air flowing back when the temperature rises, and the air sucked by the fan is also hot, resulting in the high temperature of the engine. After the tractor is used for a period of time, air passages appear around the water tank, and the air passing through the water tank decreases accordingly, which will also lead to the increase of engine temperature. In this case, a new insulation sponge should be installed and a hole should be punched in the ventilation side door to increase the ventilation volume.

The tightness of fan belt and fan failure will also affect the normal operation of cooling system. Too tight fan belt can improve the cooling effect, but too tight fan belt will increase the load and wear of bearings. This will not only bend the pump shaft, but also deform and damage the belt. Therefore, the tightness of the fan belt should be checked regularly. In actual operation, you can press the fan belt by hand. It is normal for the belt to sag within10 mm. If the belt is loose, it should be further inspected to prevent slipping. Because the fan is a very important heat dissipation device, it should be checked regularly whether its blades are damaged and deformed, whether they are installed backwards and whether the outer diameter is appropriate. If there is any problem, then rule it out. For tractors using electromagnetic fans, check whether the circuit is connected.

At present, in order to reduce fuel consumption and meet emission requirements, many large tractors also use turbocharged engines, so higher requirements are put forward for the cooling system.

Tractor 100 emits white smoke at high temperature, and the temperature is not enough. Because the engine temperature is not enough, part of the mixture formed by the fuel and air injected into the cylinder cannot burn, and the exhaust pipe emits white smoke. Therefore, after the locomotive starts, we should pay attention to the heat preservation of the water tank, run the throttle during use, and gradually increase the load when the temperature of the standby vehicle reaches above 50 degrees.

2. There is water in diesel oil and water in diesel oil, which directly affects the normal combustion of mixed gas and emits white smoke. At this time, the precipitated oil should be released and the accumulated water should be discharged. If necessary, the diesel oil should be replaced.

3. If the exhaust pipe continues to emit white smoke, it may be that the cylinder head and cylinder gasket of individual cylinders are damaged and water enters, so it should be removed for inspection and replaced with damaged cylinder head and cylinder gasket. In addition, if the intake valve is not tightly closed, white smoke will also appear, which should be inspected and maintained.

Tractors are hot but not short of water. What happened? The performance of high temperature is that water is boiling. No water shortage, not high temperature, 95 degrees is normal.

Why is the water tank not hot when the tractor is hot? If you buy a low-temperature water tank, if there is no technical problem with the tractor, you must decide whether to replace the water tank. If there is something wrong with the car, it is useless to change any water tank. Let's see why the car is hot first. You can ask other questions. If you are satisfied, please adopt it.

What should I do if the tractor water temperature is high? The water tank should be blocked.

How to deal with the high temperature of Dongfanghong 750 tractor? The masters first check whether the radiator is blocked, and then check the injector of each cylinder. I guess one of the cylinders is not working properly. Check your mouth. Is the fan belt loose? Look at the water pump circuit before opening the water tank cover.

How about adding an oil radiator to the tractor at high temperature? Why is there no radiator at home?