This hydraulic hose connects the steering control valve to the steering cylinder on the host tractor. It transmits pressurized fluid from the valve to the cylinder, converting hydraulic pressure into mechanical force that turns the front wheels. A cracked or leaking hose causes a loss of steering response and fluid contamination in the system. The hose is manufactured to the original assembly's bend radius and end-fitting geometry, which allows it to follow the chassis routing without kinking or chafing against adjacent components. When replacing, ensure the hose is routed away from exhaust components and moving linkages, and tighten the fittings to the specified torque.