What is the reason for the high water temperature of wheel loader engine? There are two main reasons for the water temperature of the loader engine: one is that the radiator is blocked, and the other is the engine itself. The heat is too high.
There are several reasons for:
1. Thermostat Remove the thermostat and check the open temperature of the thermostat. Suspend the thermostat and thermometer in a water container, then heat the container, observe the opening temperature of the thermostat, continue heating, note the full opening temperature of the thermostat, and check whether the two temperatures are within a reasonable range. 2. Open the water tank cover of the water pump and start the engine to make the engine work at high speed and low speed alternately. At the same time, observe whether the water in the water tank has obvious tumbling phenomenon. If there is, it can be normal.
After, stop heating, wait for the water temperature to drop below 82 ℃, check if the thermostat is in the closed position. Otherwise, the thermostat needs to be repaired or replaced.
3. Fan belt Press the fan belt by hand to check whether the tightness is normal. If the belt is loose, you should further check whether the fan belt slips.
4. The water-cooled engine of the air guide and heat dissipation system mostly uses suction air cooling. The air on both sides of the water tank must not have convection. Except for the communication between the cooling channels of the water tank, all other parts should be spaced. It should not be overlooked that after many machines have been used for a period of time, the aging of the data is severely cut off, making the
5. Too little cooling water, too little oil. Check if the water and oil are normal. Make up if there is a shortage.
6. Electric fan Check whether the fan blade is damaged, severely deformed or reversed, and whether there is sway vibration. If there is, it is excluded immediately.
There are ventilation channels around the water tank, which reduces the air flow through the water tank and causes high temperature. In practice maintenance, this situation is more.
7. Too much dirt on the engine. Check if there is too much dirt on the engine casing and waterway. If it is, clean it up.
8. Water tank (including radiator) Check if there is fouling on the surface of the water tank, whether the cooling air duct and the water flow channel inside the water tank are smooth. If necessary, professionals can be disassembled for cleaning.
There are several reasons for the second category:
1. Excessive wear of moving parts After excessive wear of moving parts such as cylinder liners and bushes, the rated heat will occur when the machine moves. If the heat exceeds a certain value, the water temperature will also be too high.
When the cylinder liner is excessively worn, it often follows the following phenomena:
1.1 Excessive exhaust emissions.
1.2 The engine power has decreased;
1.3 Phenomenon of burning engine oil;
When the bush is excessively worn, the following phenomena are generally accompanied by:
1.4 There is a dull knocking sound.
1.5 Acceleration of engine oil temperature rise;
1.6 The oil pressure drops significantly after the oil temperature rises;
1. The fuel supply time is incorrect. If the fuel supply time is incorrect, the engine is difficult to start, the power is reduced, and it is accompanied by abnormal smoke exhaust. There will be obvious knocking sound when the fuel supply time is too early or too late.
2. Overload work It is recognized whether the machine is overloaded for a long time. If it is, it will be changed to normal operation immediately. After a period of time, check whether the water temperature is normal.
5. Lack of intake air
Check whether the air filter is clogged; (2) whether the air filter inlet is clogged; (3) whether the turbocharger is damaged; (4) whether the connection between the turbocharger and the engine air inlet is damaged. If yes, corresponding measures should be taken to solve it. Solve the problem that the water temperature of the loader engine will recover to the normal temperature after completion.
