9.12.5 NOx sensor – Replacement
Preconditions
☑
Work on the exhaust gas aftertreatment system shall be performed by trained and qualified personnel on-
ly.
☑
Engine shut down with master switch and circulation cooling completed. Circulation cooling may run-on
for up to 7 hours after engine stop.
☑
Exhaust gas aftertreatment system shut down after end of cooling mode operation.
Special tools, Material, Spare parts
Designation / Use
Part No.
Qty.
Torque wrench, 10–60 Nm
F30452769
1
Assembly compound (Molykote P 37)
50564
1
NOx sensor
(→ Spare Parts Catalog)
3
DANGER
Falling from great heights.
Risk of serious injury – danger to life!
• When working high on the equipment, always use suitable ladders or work platforms.
• Use personal protective equipment.
WARNING
Hot components/surfaces.
Risk of burns!
• Allow the engine to cool down to below 50 °C before beginning work.
• Wear suitable protective equipment/thermal gloves.
• Avoid unprotected contact with hot surfaces.
WARNING
Components have sharp edges.
Risk of injury!
• Wear protective gloves.
WARNING
Soot, dust, fibers and sulfurous acids in parts bearing exhaust gases.
Risk of serious injury by poisoning from exhaust gas!
• Wear a respirator mask (filter class P3).
• Wear appropriate protective clothing.
• Wear protective gloves and goggles.
• Use class H dust extractors.
NOTICE
Incorrect measurement of the sensors are possible even with small amounts of contamination during
assembly and due to contaminated process materials.
Sensor damage resultant damage to components is possible!
• Prior to assembly, check sensors for particular cleanness and install with clean hands.
• Protect sensor against contamination with certain materials (e.g. thread grease, engine oil, silicone,
reducing agent and others).
• The process materials must meet the requirements of the Fluids and Lubricants Specifications.
MS15065/01E 2019-01
| Exhaust Gas Aftertreatment | 265
TIM-ID: 0000076037 - 005
