Suction leak in piping between tank and pump. Broken or slipping coupling at fuel pump. Control and fuel pump circuit breaker. Control knife switch must be closed. Main battery switch must be closed.
Loose fuel pump motor cable connection.
The sintered bronze filter is also equipped with a 45-pound relief valve and sight glass. When more than a trickle of fuel is seen in the 45-pound sight glass, it is an indication that the relief valve is open. The trip and reset lever is accessible through a hole in the engineroom floor, in the cross aisle between the two engines. On each side of the locomotive, attached to the side skirt, is a small box with a lift cover. Enclosed in this box is a pull ring on the end of the cable running to the fuel cutoff valve.