Diesel Emissions Fluid Heating Element: Service and Repair

Reductant Heater and Sender Assembly





Removal

NOTE: Inboard mounted reductant tank heater and sender procedure shown, outboard similar.

1. Remove the reductant tank. For additional information, refer to Reductant Tank Removal and Replacement.

2. Remove the reductant pump assembly. For additional information, refer to Reductant Pump Assembly Service and Repair.

3. NOTE: The outboard mounted reductant tank heater and sender has 4 wire routing retainers attached to the lock ring. Note the location of all wire routing retainers for installation.

Detach the 3 wire routing clips from the reductant heater and sender assembly lock ring.





4. Remove the wire routing clip from the wire harness.





5. Disconnect the electrical connector and remove the wire harness.





6. Detach the electrical connector from the reductant tank.





7. Using the Fuel Tank Sender Unit Wrench, remove the reductant heater and sender assembly lock ring.





8. NOTICE: Do not pry the top of the reductant heater and sender assembly out of the reductant heater and sender assembly seal. Doing so may cause reductant heater and sender assembly seal damage.

Remove the top of the reductant heater and sender assembly out of the reductant heater and sender assembly seal.

9. Remove the reductant heater and sender assembly seal.
- Discard the reductant heater and sender assembly seal.

10. NOTE: Note the position of the reductant heater and sender assembly in the reductant tank for installation.

Reach inside the reductant tank opening, and turn the reductant heater and sender assembly counterclockwise to release the 4 reductant heater and sender assembly retainers (one shown) from the base in the bottom of the reductant tank.

- Remove the reductant heater and sender assembly from the tank.





Installation

1. NOTE: Install the reductant heater and sender assembly in the same position in the reductant tank as noted during disassembly.

NOTE: Make sure the reductant heater and sender assembly is fully seated in the retainers in the bottom of the reductant tank.

Install the reductant heater and sender assembly in the tank.

- Reach inside the reductant tank opening, and turn the reductant heater and sender assembly clockwise to attach the 4 reductant heater and sender assembly retainers (one shown) to the base in the bottom of the reductant tank.





2. NOTE: Make sure the reductant heater and sender assembly seal is fully seated in the reductant tank opening.

Install a new reductant heater and sender assembly seal into the reductant tank.

3. Seat the top of the reductant heater and sender assembly in the reductant heater and sender assembly seal.

4. Install the reductant heater and sender assembly lock ring.
- Using the Fuel Tank Sender Unit Wrench, tighten the reductant heater and sender assembly lock ring.
- Tighten to 90 Nm (66 lb-ft).





5. Attach the electrical connector to the reductant tank.





6. Connect the electrical connector.





7. Install the wire routing clip on the wire harness.





8. NOTE: The outboard mounted reductant tank heater and sender has 4 wire routing retainers that attach to the lock ring. Install all wire routing clips where noted during disassembly.

Attach the 3 wire routing clips on the reductant heater and sender assembly lock ring.





9. Install the reductant pump assembly. For additional information, refer to Reductant Pump Assembly Service and Repair.

10. Install the reductant tank. For additional information, refer to Reductant Tank Removal and Replacement.