Case CX490D, Operator'S Manual

Page: 19 / 370

1 - GENERAL INFORMATION
Selective Catalytic Reduction (SCR) system
What is Selective Catalytic Reduction ( SCR )?
Your CASE CONSTRUCTION machine is equipped with an SCR after treatment system to comply with the require-
ments for exhaust emissions set by the US Environmental Protection Agency (EPA). The main components of the
SCR system include the SCR catalyst, the
DEF/A
D
B
LUE
® dosing control unit, the DEF/A
D
B
LUE
® injection system,
and the DEF/A
D
B
LUE
® tank.
How does Selective Catalytic Reduction (SCR) work?
During combustion, harmful Nitrogen Oxide (NO
x
) molecules are formed in the exhaust. By injecting a DEF/A
D
B
LUE
®
solution into the exhaust prior to a catalyst, the NO
x
can be converted to harmless elemental Nitrogen and water. This
happens when the NO
x
molecules react inside the catalyst with the heat generated by the engine and the ammonia
in the DEF/A
D
B
LUE
® solution.
NOTICE: Prolonged idling of the machine with no load for more than 6 h will cause damage to the SCR catalyst.
During cold engine operation at low engine coolant and ambient air temperatures, water vapor will be visible from the
exhaust. This water vapor will resemble steam or light white smoke, and will dissipate as the engine and machine
components warm. This water vapor is considered normal.
NOTE: The SCR system continues to operate for approximately 3 min after the starter key is turned off in order to
suck DEF/A
D
B
LUE
® back into the tank. DEF/A
D
B
LUE
® expands when freezing, and it will thus damage the lines of
the SCR system. This is considered normal, and requires no action from the operator.
What is Diesel Exhaust Fluid (DEF)/AdBlue®?
DEF/A
D
B
LUE
® is a clear, colorless, non-toxic, aqueous urea solution ( 32.5% ) with a slight ammonia odor. It is used
to chemically reduce NO
x
emissions from heavy-duty diesel-powered vehicles. DEF/A
D
B
LUE
® is neither explosive
nor harmful to the environment. DEF/A
D
B
LUE
® is classified under the minimum-risk category of transportable fluids.
International standard ISO 22241-1 defines DEF/
A
D
B
LUE
® quality. The American Petroleum Insti-
tute (API®) has a voluntary certification program for
DEF/A
D
B
LUE
® . To ensure that DEF/A
D
B
LUE
® satis-
fies the requirements of ISO 22241, look for the API®
DEF Certification Mark™ whenever you purchase
DEF/A
D
B
LUE
® . API Diesel Exhaust Fluid Certification
Mark is a registered trademark of API in the United States
and or other countries.
Finding Diesel Exhaust Fluid (DEF)/AdBlue®
Your CASE CONSTRUCTION dealer is fully equipped to accommodate all your DEF/A
D
B
LUE
® needs.
Case Customer Assistance: 1-866-542-2736
casecustomerassistance.na@cnh.com
Storage, handling, and transport
NOTICE: storage temperatures above 30 °C ( 86 °F ) greatly reduce the shelf life of DEF/A
D
B
LUE
® .
DEF/A
D
B
LUE
® has a typical shelf life of 6-12 months. Refer to the S
HELF LIFE
table below. In order for
DEF/A
D
B
LUE
® to remain in a useable condition, storage requirements must be met.
• Store between
-11 °C ( 12 °F ) and 30 °C ( 86 °F ).
• Use only an approved
DEF/A
D
B
LUE
® container. Contact your dealer to obtain proper storage container(s).
• Keep container tightly closed.
• Keep container in a cool, well-ventilated area.
• Keep away from heat and direct sunlight.
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