This hydraulic oil reservoir stores and supplies fluid to the tractor’s hydraulic system. It sits in the return circuit between the actuators and the pump inlet, maintaining a steady supply of oil for implement and steering functions. A cracked or leaking reservoir introduces air into the circuit, causing spongy control response and potential pump cavitation. This original AGCO part is molded to match the mounting bracket and port locations of the original assembly, so no adapter fittings or bracket modifications are needed. On removal, drain the system and replace the suction-line gasket before reinstalling.