The McCormick 6663771A1 is a genuine hydraulic accumulator designed for McCormick X7 and X8 series agricultural tractors, including models X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680. This essential component helps to absorb pressure fluctuations and maintain consistent hydraulic system performance, contributing to operational stability and component longevity. With a length of 200 mm, a diameter of 80 mm, and a weight of 1.5 kg, it operates at a pressure of 160 bar and has a volume of 0.7 liters.