DIFFERENTIAL GP-NOSPIN 4E3488 - Caterpillar

the fuel filter differential pressure frequently during engine operation.Fuel Filter Differential Pressure (Restriction) - This indicates the difference in fuel pressure between the inlet side and the outlet side of the fuel filter. As the fuel filter element becomes plugged, the difference in pressure between the two sides of the fuel filter increases.The nominal fuel filter differential pressure during normal engine operation is approximately 60 kPa (9 psi).Replace the secondary fuel filter elements when the fuel filter differential pressure reaches 103 kPa (15 psi).For instructions on replacement of the secondary fuel filter elements, see this Operation and Maintenance Manual, "Fuel System Secondary Filter - Replace" topic.