Note: During installation, inspection, and handling of the sensor, follow the parameters listed below:
Note: Turn off power supply before disconnecting or connecting the NOx sensor.
- Inspect harness for damaged wiring
- Inspect for secure connections at all ends of the harness
- Do not contact the sensing element when power is applied to the sensor. Contact with the sensing element may result in injury. The sensing element is heated to a minimum of
100° C (212° F).
- Do not use any lubricant on any part of the sensor other than the threads. Do not use unapproved thread lubricant. Do not apply additional anti-seize to new parts. If additional anti-seize is necessary for pre-installation, use only nickel based anti-seize or non-metallic anti-seize. Apply anti-seize to the threads only and avoid contaminating the sensor head.
- Do not use sensors that have been dropped or have been exposed to other forms of mishandling. Damage to the sensor may have occurred that is not visible.
- Replace the sensor if damaged or faulty.
To replace the NOx sensor, follow the steps listed below:
- Disconnect harness assembly and disconnect sensor cabling (1).
- Use 468-8116 Slotted Socket (22mm) to loosen the sensor.
- Remove NOx sensor probe (2).
Illustration 2 g03495917
- Install outlet NOx sensor probe. Take precautions to prevent damaging the ceramic sensor element (3) when installing.
- Ensure that the sensor is securely mounted.
- Connect harness assembly and cabling.
Note: Ensure that the NOx sensor is not covered with insulation. The insulation would trap heat in the sensor body and cable. This heat may cause sensor failure.
- Install cover plate assemblies and bolts. Refer to Specifications, SENR3130, "Torque Specifications" for the proper torque.