How to check the 70-75HP tractor thermostat

70-75HP tractor thermostat should be checked regularly to avoid failure will cause the engine to overheat or too cold, easy to accelerate engine wear caused by mechanical failure.
1, Check the engine has just started. Open the radiator cap if the cooling water in the tank is stationary, it indicates that the thermostat is working properly. This is because the temperature of the cooling water temperature is below 70 degrees season of the main valve is closed, only the engine and the cooling water inside the small cycles, the cooling water circulation within the tank is still not involved in the flow. Only when the water temperature is 80 degrees higher than the water inside the tank began to participate in the cycle. If time below 70 degrees, the water tank at the water flowing into the water and the water temperature slightly hot, then the main valve closed lax, the thermostat is faulty.
2, Check the cooling water rises after. Initial engine temperature rises rapidly, when the water temperature rose to 80 degrees, the water temperature increases speed becomes slow, indicating that the thermostat is working properly. On the contrary, the water temperature has been rising rapidly until boiling indicates that the main thermostat valves are catching not open. Timely repairs to avoid trigger other faults.