Is the high temperature sewer pipe soft of the excavator related to the water pump?

Excavators occasionally find that the water temperature is too high when they are working, and what is the reason for the high water temperature? The excavator school technician said that the engine and air conditioning system in the process of repairing the excavator have poor heat dissipation, resulting in the following kinds of failures caused by high water temperature: 1

After the hot car is turned off for more than ten minutes, it is not easy to get on the car when it starts; When a hot car is moving, it sometimes turns off automatically. 2.When the temperature is too high to turn on the air conditioner, the idle speed is unstable and the speed fluctuates too much, the rapid acceleration is weak, and the engine has abnormal noise.

When the excavator is maintained, check the temperature difference between the upper and lower water pipes of the water tank, if the temperature difference is too large, you need to check the opening of the thermostat and whether the pump has a fault of speed loss. The temperature difference between the upper and lower pipes of the water tank should not be too large. 3.

When the excavator is idling, the engine water temperature gauge is too high, the working time of the electronic fan is too long, the engine noise increases, and the temperature is too high when the air conditioner is turned on The fault is the most obvious. When the excavator is maintained: Check whether there is too much dust between the condenser and the water tank, and clean it thoroughly with high-pressure gas to ensure that the water tank and the condenser have good heat dissipation performance.

Pay attention to wipe the dust between the condenser and the water tank. 4.When the hot car is idling, the clutch of the air conditioning compressor is frequently sucked off or even disconnected, resulting in the air conditioner of the hot car not being refrigerated.

The high pressure at the high end of the excavator maintenance air conditioning system is too high; Excessive filling of air conditioning refrigerant or air conditioning refrigeration lubricant; The self-adjusting function of the internal self-debugging air-conditioning compressor fails, resulting in high pressure; There is also the blockage of the air conditioning condenser, which will increase the load on the engine, consume the heat dissipation performance of the cooling system, and cause the failure of the water temperature to be too high. Warm reminder: too little or too much refrigerant filling in the air conditioner will reduce the refrigeration effect.

5.The excavator training reminds that the air conditioning refrigeration temperature is very cold when the car is cold, and the air conditioning refrigeration effect is not obvious when the car is hot; And there is a loud resonant hum in the air conditioning system. During the maintenance of the excavator, due to the addition and replacement of antifreeze, the engine waterway and water tank will be blocked in advance, and the water temperature will be high.

Antifreeze is changed every two years, and original parts must be used when replacing and adding.

Yellow Turban Rebellion, Yellow Turban Uprising.

The high water temperature of the excavator is also called "excavator", and the "high water temperature of the excavator" means that when the water temperature of the excavator exceeds 95 degrees (or exceeds the red line) during the operation, the machine will prompt an alarm.

Fault classification: 1. The water temperature of the excavator is high.

2. High water and oil temperature.

Reasons for the high water temperature of the excavator:

The operating environment temperature is too high or the excavator is close to the heat source, which may cause the phenomenon. The summer operation of the excavator is very easy to occur, because the temperature of the summer operating environment is very high, so it is necessary to avoid long-term operation in the summer operation, and try to work as little as possible in the case of engine overload and too hot.

The heat sink of the excavator radiator is blocked by dust, and the heat dissipation effect is poor, and the excess heat cannot be discharged in time, resulting in high water temperature. To discharge the fault, it is necessary to check the heat sink frequently and clean the heat sink.

Damage to the thermostat or too little opening of the thermostat can also cause high water temperatures. In general, the thermostat can be removed in summer and installed in winter.

The water circulation of the excavator pump is not good, or the pump is damaged, which is caused.

There are bubbles in the water tank, the water circulation is not good, and the cylinder gasket is caused by the punch, and the fault can be eliminated by replacing the cylinder gasket.

The excavator water tank is too dirty, there is too much scale, and the water circulation is not good.

The excavator fan belt is too loose to affect the circulation, resulting in.

Insufficient coolant or problems with the cooling system can also cause high water temperature failures (the concentration of antifreeze ratio may be too high in summer).

A broken engine cover can also cause malfunction.

In addition, if the oil temperature of the excavator is too high, the operation time is too long, which will also cause the phenomenon of high water temperature.

Solution:1"Load shedding, low speed"to reduce endothermy. Put the throttle into the first gear to idle to reduce the load and speed, and the heat generated by the friction of each moving part will correspondingly reduce the heat generated by the engine, indirectly reduce the heat absorbed by the coolant, thereby reducing the speed at which the water temperature rises.

2. Increase the air inlet volume of the water tank to accelerate heat dissipation. Open the side doors on both sides of the excavator to make the air volume of the radiator larger, and the cabin temperature can be quickly dissipated, thereby reducing the speed of water temperature rise.

3. After the temperature drops, check whether the antifreeze in the water tank is missing, and add antifreeze. If you don't have a spare antifreeze nearby, you can add it"Purified or distilled water for human use"Never add river or groundwater.

4. After the temperature drops, clean the radiator. After the temperature drops, check whether there is too much dust between the radiator, condenser and water tank, and clean it thoroughly with high-pressure gas to ensure that the water tank and condenser have good heat dissipation performance. Attention should also be paid to wiping the dust between the condenser and the water tank.

In fact, 80% of the high temperature of excavators is caused by poor heat dissipation. Therefore, thoroughly cleaning the debris on the surface of the radiator and the internal scale and oil scale is the best way to solve the high temperature of the excavator.

Let's start with the simple aspects.

1.Check that the fan and fan belt are in good working order.

2. The wrong oil supply time will also cause high water temperature.

3.The engine intake is insufficient. Check the air filter, air intake pipe for air leakage, and supercharger for damage.

4.Whether the barrier material of the water tank is aging, and whether there is an air duct formed around the water tank, which reduces the air flow through the water tank and causes high temperatures.

5.If that doesn't work, check the engine.

Don't have a receiver either?

Generally, there is a thermostat on the engine, if you remove the thermostat yourself, you should block the water outlet of the small circulation, and let the circulating water circulate through the radiator for large circulation, otherwise, most of the water is still circulating in the small circulation, which can not dissipate heat well.

That's your engine bearings, or your cylinders are pulling, and it's not about the waterways!

Whether your engine is imported or domestic, I won't import it.

1. The wear of the parts of the excavator cooling system itself causes the heat dissipation efficiency to decrease. (If it is a component failure, the heat dissipation capacity of the excavator is not a problem of declining, it is directly not working, and the machine will be high temperature when it is turned on).

It is common for cooling fans to wear out or be deformed by corrosion. Once this phenomenon occurs, the cooling fan will not be able to reach the maximum heat dissipation air volume, which will lead to insufficient heat dissipation in the excavator cooling system.

Improper belt tightness of the engine-driven cooling fan and failure of the coolant circulating water pump are also common causes.

2. The maintenance of the cooling system of the excavator has not kept up.

The working environment of the excavator is harsh and generally dusty, which can easily cause the surface of the excavator radiator to be covered with dust and sediment, blocking the heat dissipation channel. If it is not cleaned up in time, it will cause the problem of insufficient heat dissipation capacity of the excavator.

3. Insufficient coolant.

Insufficient coolant can also lead to a decrease in the cooling system's ability to dissipate heat.

4. Unreasonable coolant is used.

The common situation is that many excavators use water instead of coolant in order to save costs, which will produce a large amount of scale after long-term use, and will also corrode the pipeline to produce impurities, iron filings, etc., which will block the radiator, and then cause insufficient heat dissipation capacity.

5. The unreasonable heat dissipation structure of the excavator cooling system.

First look at whether the radiator is dirty and whether there is debris blocking the heat dissipation air channel. Whether the water pump fan belt is loose or aging; whether the waterways are clogged by the frequent addition of tap water; If none of the above is true, then ask the master to see if there is a problem with the thermostat and water pump.

I've run out of everything, and it's still useless.

There are two cases:

1. Confirm the clutch macro family of the compressor first.

whether there is suction or not;

If not, it may be that the compressor clutch is ablated (caused by the internal jamming or slippage of the compressor) or the lack of cover is the power supply line on the clutch side (there is no voltage output to the clutch at both ends of the harness loop, resulting in the clutch cannot be engaged);

2. If the clutch has a suction concealment, the compressor is running normally, but the pressure difference between the air conditioner is still not large; It is necessary to confirm that the control valve of the compressor (at the rear of the compressor near the tail) is normal.

1. There are many reasons for the high water temperature of the engine or even "boiling", such as damage to the electronic components of the cooling system (thermostat, cooling fan), poor heat dissipation of the radiator, insufficient coolant, etc.

2. Pull over, but don't turn off the engine immediately! Because the coolant temperature is already high and the cooling capacity has reached its limit, if the engine is turned off immediately, the boiling coolant will stop circulating (for most engines, the water pump is driven by the crankshaft).

3. Of course, if it is an electric water pump engine, it will be better), too high temperature can not be cooled, and the engine is also unbearable. If the engine is left idle for a while, the constant circulation of coolant can still reduce the impact of high temperatures on the engine.

4. Check whether the antifreeze is lacking, resulting in high engine water temperature. The circulation of the coolant, whether the circulation is not smooth. Secondly, you can also check that water temperature sensors, water pumps, thermostats, cooling fans, etc., may cause high water temperatures.

If you don't have a strong hands-on ability, you should go to the repair shop for an inspection.

Change the fan pulley and speed up to remove the thermostat.

It is possible that the pump will fail, but it is also necessary to consider the problem of the waterway and whether the fan inlet is unobstructed.

If the water does not circulate, it is broken, and the water does not know that it flows in it, and it will definitely not dissipate heat.