NOx sensor
NOx sensor includes a control unit and a separate
sensor head.
Mounting: 2 sensors on the exhaust line, before
DOC catalytic converter and after the SCR catalytic
converter.
• Sensor head thread: M20x1,5
• Sensor head torque: 50 Nm
• Voltage 12 V or 24 V
Fig. 114
Exhaust gas temperature sensor
Mounting: 3 sensors on the exhaust line, before
the DOC catalytic converter, before and after the
SCR catalytic converter.
• Thread: M14x1,5
• Torque: 40 Nm
Fig. 115
3.14.3 Removing the supply module
Before starting the procedure
Make sure that cleaning cloths and protection caps for hydraulic and electrical connectors are available.
Reserve a suitable container for the DEF, which can drain out of the hoses.
Procedure
1.
Remove any components which can prevent the removal of the supply module.
2.
Loosen all tubing and wiring supports which can prevent the removal of the supply module.
3.
Open the hydraulic connectors and install protection caps to the supply module connectors.
4.
Remove the electrical plug and install a protection cap.
5.
Remove the bolts that connect the supply module to the holder.
6.
Clean the supply module.
3.14.4 Installing the supply module
Procedure
1.
Tighten the bolts that connect supply module to the holder with 19 ± 20% Nm torque.
2.
Remove the protection cap from the electrical connector and connect.
3.
Remove protection caps from hydraulic connectors and install pipe lines.
3. Maintenance
3-70 4th Generation Engines
8370 79492
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