This original antifreeze fluid reservoir is a component of the brake system on the host tractor. It stores the hydraulic fluid that transmits pressure from the master cylinder to the brake actuators. A cracked or leaking reservoir causes a loss of fluid, leading to a spongy brake pedal and reduced braking force. The part is manufactured by AGCO to match the original mounting points and port geometry of the assembly it replaces, ensuring a proper seal at the connection to the brake master cylinder.