Selective Catalytic Reduction (Scr) Exhaust Treatment - Product Overview - New Holland CR6090 Tier 4a Service Manual

Selective Catalytic Reduction (SCR) exhaust treatment - Product
overview
CR Series Tier IV
CR6090 [YDG118501 - ]
CR6090
CR7090 [YDG118501 - ]
CR7090
CR8080 [YDG118501 - ]
CR8080
CR8090 [YDG118501 - ]
CR8090
CR9090 [YDG118501 - ]
CR9090
What is Selective Catalytic Reduction (SCR)?
Your NEW HOLLAND machine is equipped with additional components to comply with national and local exhaust
emissions requirements. The main components of the SCR system include the SCR catalyst, the Diesel Exhaust
Fluid (DEF)/AdBlue® injection unit, the DEF/AdBlue® tank, and the DEF/AdBlue® dosing control unit.
How does Selective Catalytic Reduction (SCR) work?
During combustion, harmful Nitrogen Oxide (NO
solution into the exhaust prior to a catalyst, the NO
happens when the NO
x
in the DEF/AdBlue® solution.
During cold engine operation at low engine coolant and ambient air temperatures, water vapor will be visible from the
exhaust when the engine operates. This water vapor will resemble steam or light white smoke and will dissipate as
the engine and machine components warm and is considered normal.
NOTE: After engine shutdown, the SCR system will perform a purge cycle, which permits the supply module to con-
tinue to run for up to 70 seconds. This is to be considered normal and requires no action from the operator.
What is Diesel Exhaust Fluid (DEF)/AdBlue®?
DEF/AdBlue® is a clear, colorless, non-toxic, aqueous
urea solution ( 32.5 %) with a slight ammonia odor used to
chemically reduce NO
x
powered vehicles. DEF/AdBlue® is neither explosive nor
harmful to the environment and is classified under the
minimum-risk category of transportable fluids.
DEF/AdBlue® quality is defined by ISO 22241-1. The
American Petroleum Institute (API®) has a voluntary
certification program for DEF/AdBlue®. To ensure DEF/
AdBlue® satisfies the requirements of ISO 22241, look
for the API® DEF Certification Mark™ whenever you pur-
chase DEF/AdBlue®. API Diesel Exhaust Fluid Certifica-
tion Mark is a registered trademark of API in the United
States and or other countries.
Finding Diesel Exhaust Fluid (DEF)/AdBlue®
Your NEW HOLLAND dealer is fully equipped to accommodate all your DEF/AdBlue® needs.
New Holland Top Service: 1-866-639-4563
molecules react inside the catalyst with the heat generated by the engine and the ammonia
emissions from heavy-duty diesel
INTRODUCTION
NA
NA
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NA
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) molecules are formed in the exhaust. By injecting a DEF/AdBlue®
x
can be converted to harmless elemental Nitrogen and water. This
x
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