First, the cause of the engine temperature is too high
1. The cooling system leaks or insufficient cooling water; 2. Water temperature gauge indicates the denial or failure; 3. cooling system scale too much, poor heat dissipation; 4. Radiator guard radiator core network or air ducts clogged debris, causing poor heat dissipation; 5. pump, fan belt too loose or broken; 6 pumps damaged fan blades installed backwards or deformed, wind ring damage; 7. thermostat damage in the main valve in the closed position; 8 engine and long-term overload oil too late and so on.
Second, the engine temperature is too high Remedy
When the engine water temperature is too high fault occurs in the work, we should observe the symptoms, identify the causes be excluded. First check if the water table is failure, if the denial or failure should be replaced; then check whether the water tank, inlet, whether broken radiator leaks, in addition to direct observation from the outside, but also with cheer method to check the leakage site. Soldering radiator leak repair parts available, such as a root heat pipe rupture heavier, materials lifting equipment may be two folders flat blocked. Work found a slight leak, blocked with soap, to be repaired parking. If such reasons, should be further examination of the engine housing cracks, water blocking ring is damaged, also check the pump weep hole leaks. Finally, check whether the radiator cap of the exhaust valve failures, such as failures should be replaced.
If not cooling water leaks should be two cases of failure analysis and elimination. 1. sudden water temperature is too high. First check the radiator is overheating, if the heat sink temperature is too high, indicating that the cylinder head gasket washed out, this time pay attention to check the plane and head on the body surface is combined with serious warpage, if the deformation should be repaired. The heat sink temperature is not high, then the bad cooling water, check the fan belt is broken or seriously slipping. If normal, then check whether the radiator outlet pipe is sucked deflated, delamination or without clogging the hole, to identify the reasons to be excluded, the approach is to put appropriate contingency big spring supported within the suction tube deflated. Then check the thermostat expansion cylinder is broken, cracked should be replaced. As the thermostat properly, then the pump is damaged, repair the pump should be carefully checked. 2. Non sudden water temperature is too high. For high temperature is not a sudden phenomenon, should increase the engine speed is over the water intake observed increase, bearing in mind the large number or a small amount over the water. If large over the water, 20 ton overhead crane and the heat sink temperature is uneven, it indicates some cooling pipe stuck in the cold winter should pay attention. When the low front plus a small amount over the water intake and the engine temperature is high, then the distribution tubes are damaged or blocked, should be replaced. If such reasons, it may be excessive cooling of scale, poor waterway. Such as adding water at the outlet does not turn, then deal with the cooling system and engine mechanical part look carefully examine the analysis.
Should first check whether to close or open the shutters of the lack of fan rotation is normal, if everything is normal, while the engine is still hot, you should check the fan air flow. Lack of wind capacity, should be adjusted to the angle of the fan blades and blade head bend or change the appropriate fan blades.
Under normal circumstances, the cooling system, the engine is still hot, because of the use should be considered. In short, the reason for engine overheating are many, aluminum gantry cranesaccording to the method described above can be applied flexibly to inspect specific exclusion.
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