The control of the cooling water temperature mainly depends on the thermostat, and the inspection of the thermostat can be carried out on the Diesel Forklift as follows:
1, the Safe Diesel Forklift Trucks engine after the inspection: open the radiator water inlet cover, if the cooling level inside the radiator is static, it indicates that the thermostat is working normally, otherwise, the thermostat is working abnormally.
2, this is because, when the water temperature is lower than 70 °C, the thermostat expansion tube is in a contracted state, the main valve is closed; when the water temperature is higher than 80 °C, the expansion cylinder expands, the main valve gradually opens, and the circulating water in the radiator begins. flow.
3. When the water temperature gauge indicates below 70 °C, if there is water flowing in the radiator inlet pipe and the water temperature is warm, the main valve of the thermostat is not closed tightly, so that the cooling water is prematurely and largely circulated.
4, the inspection after the water temperature rises: the initial temperature of the engine, the water temperature is very fast; when the water temperature indicator indicates 80, the heating rate slows down, indicating that the thermostat works normally. On the other hand, if the water temperature has risen rapidly, when the internal pressure reaches a certain level, the boiling water suddenly overflows, indicating that the main valve is stuck and suddenly opens.
5. When the water temperature gauge indicates 70°C-80°C, open the radiator cover and the radiator drain switch, and feel the water temperature by hand. If both are hot, the thermostat works normally; if the radiator water inlet is low, the radiator There is no water flowing out from the inlet pipe of the upper water chamber or the water flow is very small, indicating that the main valve of the thermostat cannot be opened.