The vane pump which functions to generate hydraulic pressure, at the top of the pump there is a reservoir which is always filled with water with a special fluid, and the fluid level must always be checked regularly. For this purpose, if someone checks the level of the fluid level, it is necessary to check the condition of the fluid including the temperature of the fluid, the presence of bubbles or the fluid becomes cloudy. It should be noted that the power steering fluid volume does not change unless there is a leak.