The John Deere AL66857 Hydraulic Tank is a genuine OEM component designed for various John Deere 5000 Series tractors. This essential part serves as the reservoir for hydraulic fluid, crucial for the proper functioning of the tractor's hydraulic systems, including steering, lifting, and auxiliary operations. Engineered to meet John Deere's rigorous standards, it ensures reliable fluid containment and contributes to the longevity and efficiency of the hydraulic system. This part number AL66857 has been superseded by AL110874.