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9.12.3 Dosing unit – 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 shut down after end of cooling mode operation.
☑ Pressure reduction of RA system completed (5 minutes after end of cooling mode).
☑ Shutoff devices for the reducing agent lines must be available on the plant side.
Special tools, Material, Spare parts
Designation / Use
Torque wrench, 8–40 Nm
Ratchet bit
Assembly compound (Molykote P 37)
Dosing unit
Graphite ring seal
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
Ammonia is created in case of fire or overheating.
Risk of poisoning if reducing agent (e.g. AdBlue, DEF) is swallowed.
Risk of skin irritation and eye injury on contact with reducing agent (e.g. AdBlue, DEF).
Risk of injury and poisoning!
• Avoid contact with eyes or skin.
• Do not inhale vapors or smoke.
• Never eat, drink or smoke when handling reducing agent (e.g. AdBlue, DEF).
• Wear protective clothing, protective gloves and safety goggles / safety mask.
WARNING
Reducing agent (e.g. AdBlue, DEF) is hot.
Risk of injury and scalding!
• Allow product to cool down.
• Slowly open line connections and closures.
• When opening, ensure that the separation points are covered with cloths.
• Wear protective clothing, protective gloves, and safety goggles / safety mask.
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.
MS15065/01E 2019-01 | Exhaust Gas Aftertreatment | 261
Part No.
F30043446
F30027340
50564
(→ Spare Parts Catalog)
(→ Spare Parts Catalog)
Qty.
1
1
1
6
6
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