This fuel hose carries diesel from the filter housing to the injection pump on the host tractor. It is a formed, pre-shaped line that maintains a fixed routing path to avoid kinks or chafing against adjacent components. A cracked or collapsed hose allows air ingress, which causes erratic idle and hard starting. The hose is manufactured to the same internal diameter and bend geometry as the original assembly, so it seats into the existing retaining clips without additional support. When replacing, ensure the hose ends are fully seated on their barbed fittings and that the retaining clips are reinstalled in their original positions.