1. The engine is hot, but the coolant is not reduced
The large concrete mixer is overheated, but the cooling system works normally. At this time, the engine should be kept idling. It is strictly forbidden to turn off the engine. Pour cold water on the surface of the radiator to speed up the cooling. When the temperature drops to about 50 degrees, loosen the water tank cover with a wet towel to cool down. Then be sure to check whether the oil dipstick scale is within the normal range.
2. The engine water temperature is too high, and the cooling system circulation fails
For large concrete mixer, the engine water temperature is too high, and there are many reasons for the failure of the cooling system cycle, such as thermostat, cooling silicone oil fan, fan belt and other damage, resulting in the cooling system can not work normally. First of all, keep the engine idling and cool the radiator with cold water. When the engine temperature drops below 80 ℃, stop the engine intermittently, step on the flameout switch or unplug the sensor of the EFI system, and use the starter to drive the engine to run. 10-15 seconds is an operation cycle to cool the building. Finally, check whether the oil dipstick scale is within the normal range.
3. The coolant is missing or lost, and the engine cooling system is in dry burning state
Large concrete mixer engine running without coolant, especially in summer, will cause serious accidents. At this time, it is invalid to use any way of cooling water pouring radiator to cool down, and the engine running can not dissipate heat. At this time, in the idle state of the engine, open the oil filler and quickly fill the lubricating oil. This is mainly because in the state of complete water shortage, the engine lubricating oil will evaporate with a large amount of high temperature and must be quickly replenished.
After adding lubricating oil, the engine must be shut down. Take any method to shut down the engine and cut off the oil. At the same time, run the starter and run the engine passively. It can last for 10 seconds and stop at an interval of 5 seconds to maintain this frequency. It is better to damage a starter than to keep the engine. To a large extent, serious accidents such as cylinder sticking and cylinder pulling should be avoided. The price of concrete mixer is moderate and the profit is considerable, which is worth considering. However, the solutions to the common faults of large concrete mixer should also be understood, so as to deal with the problems calmly.