Analysis of the cause of overheating of the excavator engine: 3C6J2.1 is overwhelmed. The reason is that the engine is correct, and the fire is too late; the combustion chamber has taken into the oil or injects excess diesel; the long-term overload operation causes the hydraulic oil temperature. After the engine is observed, the above reasons are excluded. The engine has just started working properly, and it has been overheated after half an hour. It seems that other reasons.
It is insufficient heat dissipation. The reason is that the water is insufficient, the water is lack of water; the water quality is poor, the oil is mixed into the oil, reducing thermal conductivity; the water quality has a large amount of scale, severe impact on heat dissipation; water is mixed into the heat dissipation ability; the thermostat is poor, the large cycle opening degree is not enough; mud Sand, rust, scale and other impurities; water tank grille is blocked by branches, insects, sediment debris; poor water pumps; fan belt relaxation, fan blade deformation causes insufficient cooling, etc.
After the reason for the existence of the outside, the fan belt is first adjusted to the appropriate tension. It also has a complete cleaning of the water tank and hydraulic oil radiator, removes the oil on the grid, insects. From the appearance of the radiator as in the new, after entering the construction site for a period of time, the effect has changed, and the overheated alarm time is extended by the original half hour. It is basically around 4 hours, but still overheat, we The engine was checked, and later judged or endless, so that the heat dissipation system was analyzed, the heat dissipation system was combined with the hydraulic oil radiator, and the middle was completely sealed with a sponge. It is judged that there may be a debris between the two, so that the sponge is disassembled, it is found that the tank and the hydraulic oil heat exchanger are blocked by the willow, and the high load is performed after the clearance, and there is no overheating phenomenon.
Subsequently, it analyzes this phenomenon: Since the engine is exhausted, the wind is very fierce, and the engine's wind is inhaled into the grille of the water tank, from the appearance of the wind. Just the hydraulic oil radiator, removes its debris, but it is not easy to see on the water tank.
