For the problem of high water temperature, it is generally very common in summer, but in winter, this situation sometimes occurs. If this problem occurs, the small excavator is faulty. So what should I do for this kind of problem? Solve it?
First of all, let's analyze the reasons for the failure of small excavators
1. When the temperature is too high and the air conditioner is turned on, the idling speed is unstable and the rotation speed fluctuates too much, the acceleration is weak, and the engine has abnormal noise.
When the small excavator is repaired, check the temperature difference between the upper and lower water pipes of the water tank. If the temperature difference is too large, it is necessary to check the opening of the thermostat and whether the water pump has a fault that the speed is lost. The temperature difference between the upper and lower water pipes of the water tank should not be too large.
2. After the hot car is turned off for ten minutes, it is not easy to start the car when it is started; sometimes it will automatically turn off when the hot car is running.
Solution: After the car is warmed up, check the water return of the return pipe at the upper end of the antifreeze water tank. If the return water is not smooth or blocked, the water temperature will be too high.
Warm reminder: Do not blindly disassemble and replace parts in the maintenance of small excavators.
3. When the car is cold, the cooling temperature of the air conditioner is very cold, and the cooling effect of the air conditioner is not obvious when the car is warm; and there is a large resonance buzzing sound in the air conditioning system.
Due to the irregular addition and replacement of antifreeze during the maintenance of small excavators, the engine water channel and water tank will be blocked in advance, and the water temperature will be high. Antifreeze is replaced every two years, and original parts must be used when replacing and adding.
4. When the small excavator is idling, the engine water temperature gauge shows too high, the working time of the electronic fan high-speed gear is too long, the engine noise increases, and the fault is most obvious when the temperature is too high and the air conditioner is turned on.
When the small excavator is repaired: Check whether there is too much dust between the condenser and the water tank, and thoroughly clean it with high-pressure air to ensure that the water tank and the condenser have good heat dissipation performance. Usually pay attention to wipe the dust between the condenser and the water tank.
5. When the hot car is idling, the air conditioner compressor clutch is frequently sucked and disconnected, or even disconnected, causing the hot car air conditioner not to cool.
The high pressure at the high-pressure end of the air-conditioning system is too high; the air-conditioning refrigerant or air-conditioning refrigeration lubricating oil is overfilled; the self-adjusting function of the internal self-adjusting air-conditioning compressor fails, causing the high pressure to be too high; and the air-conditioning condenser Blockage, the above faults will increase the load of the engine, consume the heat dissipation performance of the cooling system, and lead to the occurrence of faults with excessive water temperature. Warm reminder: Too little or too much refrigerant in the air conditioner will reduce the cooling effect.