This rubber hose carries hydraulic fluid between components in the tractor's hydraulic system. It connects the pump output to the control valve bank or the valve bank to the actuator, depending on its routing in the circuit. A cracked or softened hose causes pressure loss, slow implement response, and external leaks that can draw air into the fluid. The manufacturer's original hose uses the same inner-rubber compound and reinforcement braid as the original assembly, so it maintains the system's rated working pressure without ballooning or bursting. On replacement, ensure the hose ends are clean and the fittings are torqued to the specification for the port size.