Hydraulic Direction Unit Test Bench, have constant temperature refrigerated Liquid bath chiller with heater, whose size of inner chamber (500 x 400 x 400 mm//SS 304), with fluid capacity 80 Liter. This thermostatically controlled oil tank (temperature +5 to +95 degree Celsius with accuracy of +/-0.1 degree Celsius) will maintain temperature of working fluid (Turbonycoil 13 B) at 35 degree Celsius.