Case CX490D - Selective Catalytic Reduction (SCR) System

1-GENERALINFORMATION
SelectiveCatalyticReduction(SCR)system
WhatisSelectiveCatalyticReduction(SCR)?
YourCASECONSTRUCTIONmachineisequippedwithanSCRaftertreatmentsystemtocomplywiththerequire-
mentsforexhaustemissionssetbytheUSEnvironmentalProtectionAgency(EPA).Themaincomponentsofthe
SCRsystemincludetheSCRcatalyst,theDEF/ADBLUE®dosingcontrolunit,theDEF/ADBLUE®injectionsystem,
andtheDEF/ADBLUE®tank.
HowdoesSelectiveCatalyticReduction(SCR)work?
Duringcombustion,harmfulNitrogenOxide(NO
x
)moleculesareformedintheexhaust.ByinjectingaDEF/ADBLUE®
solutionintotheexhaustpriortoacatalyst,theNO
x
canbeconvertedtoharmlesselementalNitrogenandwater.This
happenswhentheNO
x
moleculesreactinsidethecatalystwiththeheatgeneratedbytheengineandtheammonia
intheDEF/ADBLUE®solution.
NOTICE:Prolongedidlingofthemachinewithnoloadformorethan6hwillcausedamagetotheSCRcatalyst.
Duringcoldengineoperationatlowenginecoolantandambientairtemperatures,watervaporwillbevisiblefromthe
exhaust.Thiswatervaporwillresemblesteamorlightwhitesmoke,andwilldissipateastheengineandmachine
componentswarm.Thiswatervaporisconsiderednormal.
NOTE:TheSCRsystemcontinuestooperateforapproximately3minafterthestarterkeyisturnedoffinorderto
suckDEF/ADBLUE®backintothetank.DEF/ADBLUE®expandswhenfreezing,anditwillthusdamagethelinesof
theSCRsystem.Thisisconsiderednormal,andrequiresnoactionfromtheoperator.
WhatisDieselExhaustFluid(DEF)/AdBlue®?
DEF/ADBLUE®isaclear,colorless,non-toxic,aqueousureasolution(32.5%)withaslightammoniaodor.Itisused
tochemicallyreduceNO
x
emissionsfromheavy-dutydiesel-poweredvehicles.DEF/ADBLUE®isneitherexplosive
norharmfultotheenvironment.DEF/ADBLUE®isclassiedundertheminimum-riskcategoryoftransportableuids.
InternationalstandardISO22241-1denesDEF/
ADBLUE®quality.TheAmericanPetroleumInsti-
tute(API®)hasavoluntarycerticationprogramfor
DEF/ADBLUE®.ToensurethatDEF/ADBLUE®satis-
estherequirementsofISO22241,lookfortheAPI®
DEFCerticationMark™wheneveryoupurchase
DEF/ADBLUE®.APIDieselExhaustFluidCertication
MarkisaregisteredtrademarkofAPIintheUnitedStates
andorothercountries.
FindingDieselExhaustFluid(DEF)/AdBlue®
YourCASECONSTRUCTIONdealerisfullyequippedtoaccommodateallyourDEF/ADBLUE®needs.
CaseCustomerAssistance:1-866-542-2736
casecustomerassistance.na@cnh.com
Storage,handling,andtransport
NOTICE:storagetemperaturesabove30°C(86°F)greatlyreducetheshelflifeofDEF/ADBLUE®.
DEF/ADBLUE®hasatypicalshelflifeof6-12months.RefertotheSHELFLIFEtablebelow.Inorderfor
DEF/ADBLUE®toremaininauseablecondition,storagerequirementsmustbemet.
•
Storebetween-11°C(12°F)and30°C(86°F).
•
UseonlyanapprovedDEF/ADBLUE®container.Contactyourdealertoobtainproperstoragecontainer(s).
•
Keepcontainertightlyclosed.
•
Keepcontainerinacool,well-ventilatedarea.
•
Keepawayfromheatanddirectsunlight.
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