Electronic Control System Signature, ISX and QSX15 Engines – 019-170   Front Rail Pressure Sensor

WARNING  Fuel is flammable. Keep all cigarettes, flames, pilot lights, arcing equipment, and switches out of the work area and areas sharing ventilation to avoid severe personal injury or death when working on the fuel system.

If equipped, close the fuel shutoff valve before changing the front rail pressure sensor. Failure to do so can cause the overhead tank can to drain, causing a fuel leak.

NOTE: In the picture shown, the rear rail pressure sensor is on the left and the front rail pressure sensor is on the right.

Lift up on the locking tab and pull the electrical connectors apart.

Remove the sensor.

Use quick-dry electrical contact cleaner, Part No. 3824510, to remove all dirt and moisture from the sensor connector port and the harness connector.

CAUTION  Use only Cummins-recommended lubricant DS-ES, Part No. 3822934. Other lubricants, such as lubricating oil or grease, in the connectors can cause ECM damage, poor engine performance, or premature connector wear.

Apply a small amount of lubricant to the connector terminals. Before installing, fill the entire connector cavity with lubricant.

In the picture shown, the rear rail pressure sensor is on the left and the front rail pressure sensor is on the right.

Lubricate the sensor o-ring.

Install the front rail pressure sensor.

Push the connectors together until they lock.