Case CX490D, Operator'S Manual

Page: 130 / 370

3 - CONTROLS AND INSTRUMENTS
Selective Catalytic Reduction (SCR) system
The SCR after treatment system is intended to abate the emissions of NOx into the engine exhaust gases.
SMIL14CEX2523EB
1
1. Engine
2. DEF/AdBlue® tank
3. DEF/AdBlue® dosing control unit
4. SCR catalyst block
By spraying DEF/AdBlue® fluid into the exhaust gases prior to a catalyst block, the NOx molecules react inside the
catalyst with the ammonia contained in the DEF/AdBlue® , thanks to the high temperatures generated by the exhaust
gases. The NOx are thus converted to harmless elemental Nitrogen and water.
Make sure not to damage, modify or remove any component related to the SCR after treatment system.
NOTICE: Do not kick or hit the SCR catalyst block in order not to severely damage it.
NOTICE: Depending on machine usage, rust may form on the exhaust pipe and/or fasteners earlier than expected,
even on new machines. If any visible abnormality is found, contact the CASE CONSTRUCTION dealer immediately.
NOTICE: Do not change the length or orientation of the air intake line to the engine, or of the exhaust line from
the engine. The function of the SCR system may be negatively affected. Do not remove or modify components of
equipment related to the exhaust emission control system.
NOTICE: Do not touch the water released from the muffler. This water is slightly acidic due to the action of the
oxidation catalyst built into the muffler. If the water from the muffler has come in contact with your skin, etc., rinse the
affected area with ample water.
3-78