High hydraulic oil temperature of excavator will inevitably cause high water temperature. When the hydraulic oil radiator is blocked, the hydraulic oil will be hot. Moreover, the air inlet volume will be affected and the water temperature will rise further after the blockage.
Symptom: when the altitude of a Komatsu PC460LC-8 excavator reaches 200, the excavator speed is very slow, and the water temperature is still 104 ℃ The excavator has been replaced with a new fan motor, and the fan pump has also been replaced, but it still doesn't work.
The excavator slows down as soon as the water temperature is high, and the hotter it gets, the slower it slows down. What's the problem? Maybe the heat dissipation is not enough, or the water tank is blocked Some excavators have overheat protection. When the temperature is high, start the protection function to protect the vehicle from burning out.
Inspection and Analysis on the fault of Komatsu PC460LC-8 excavator with high water temperature and slow speed:
1. Are you sure there is no problem with the circuit? Is the water temperature sensor circuit OK? It can be short circuited The water temperature sensor can be exchanged
2. Is it water or antifreeze in the water tank? If it is water, the engine may be rusted and blocked the water channel. At the same time, check the radiator.
3. Remove thermostat Is it still hot? Check the heat dissipation effect to see if the external seal has fallen off, causing poor heat dissipation.
4. Is the between the water tank and radiator blocked with sponge or other things? If not, replace the water tank with a 5-layer pipe.
5. Is the fan pump pressure normal? It must be the air conditioning problem When the boiling point of coolant is reduced at high altitude, it is necessary to adopt closed circulation system, increase heat dissipation area and air flow rate, which can reduce the temperature.
6. The fan clutch pressure is insufficient and the speed cannot be reached Whether the air intake of the engine is enough when working at high altitude.
