1. Inspection of the thermostat for off-road forklifts
The off-road forklift thermostat is also known as a thermostat. The function is to automatically adjust the amount of water entering the radiator based on the temperature of the cooling water, change the water circulation range, and adjust the heat dissipation capacity of the cooling system to ensure that the off-road forklift engine operates within the appropriate temperature range. During the start-up of the chiller, there should be a significant temperature difference between the inlet and outlet pipes when touched by hand. After a period of time, the temperature difference should be significantly reduced. When the off-road forklift reaches normal operating temperature, there is no obvious temperature difference when touched by hand. Of course, the accurate detection method is to remove the thermostat, heat it in hot water, and check the sealing temperature and valve lift of the valve.

2. Inspection of off-road forklift water pump
The power source for the continuous circulation of cooling water in the cooling system comes from the water pump. Whether the water pump can establish sufficient pressure is the key to the normal operation of the cooling system. When increasing the cooling water, if the cooling level significantly decreases with the decrease of the engine speed of the off-road forklift, it indicates that the water pump is operating normally. On the contrary, the water pump and impeller become loose, and the cooling water cannot circulate. The water pump, engine, and cooling fan share a common belt, so the tightness of the belt directly affects the speed of the water pump, fan, and engine of four-wheel drive off-road forklifts. Press down the middle of the belt with your fingers. The downward deflection should be within a certain range, which is normal. If it is too high, it will cause excessive water temperature, while if it is too small, it will cause damage to the water pump bearings and engine bearings.