This solenoid valve controls fuel shutoff by opening or closing the fuel supply at the injection pump. It is mounted directly on the pump housing and receives an electrical signal from the ignition or safety circuit. When energized, the valve allows fuel to flow to the injection elements; when de-energized, it cuts fuel delivery to stop the engine. A failed solenoid may cause the engine to not start, run intermittently, or fail to shut off. The original valve matches the mounting flange geometry and electrical connector orientation of the pump housing, ensuring correct plunger stroke and sealing without modification.