1-GENERALINFORMATION
SelectiveCatalyticReduction(SCR)exhausttreatment-Product
overview
WhatisSelectiveCatalyticReduction(SCR)?
YourNEWHOLLANDCONSTRUCTIONmachineisequippedwithadditionalcomponentstocomplywithnational
andlocalexhaustemissionsrequirements.ThemaincomponentsoftheSCRsystemincludetheSCRcatalyst,the
DieselExhaustFluid(DEF)/AdBlue®dosingmodule,andtheDEF/ADBLUE®tank.
HowdoesSelectiveCatalyticReduction(SCR)work?
Duringcombustion,harmfulnitrogenoxide(NOx)moleculesareformedintheexhaust.ByinjectingaDEF/ADBLUE®
solutionintotheexhaustpriortoacatalyst,theNOxcanbeconvertedtoharmlesselementalnitrogenandwater.This
happenswhentheNOxmoleculesreactinsidethecatalystwiththeheatgeneratedbytheengineandtheammonia
intheDEF/ADBLUE®solution.
NOTICE:Donotidlethemachinewithnoloadformorethan6h,ordamagetotheSCRcatalystwilloccur.
Duringcoldengineoperationatlowenginecoolantandambientairtemperatures,watervaporwillbevisiblefromthe
exhaust.Thiswatervaporwillresemblesteamorlightwhitesmoke,andwilldissipateastheengineandmachine
componentswarm.Thiswatervaporisconsiderednormal.
NOTE:Afterengineshutdown,theSCRsystemwillperformapurgecycle,whichpermitsthesupplymoduletocon-
tinuetorunforupto90seconds.Thisisconsiderednormalandrequiresnoactionfromtheoperator.
WhatisExhaustGasRecirculation(EGR)andhowdoesitwork?
YourNEWHOLLANDCONSTRUCTIONmachineisequippedwithadditionalcomponentstocomplywithnational
andlocalexhaustemissionsrequirements.ThemaincomponentsoftheEGRsystemincludeEGRvalve,exhaust
temperaturesensors,differentialpressuresensor,andthrottlevalveactuator.
EGRworksbyrecirculatingaportionoftheengineex-
haustgassesbackintotheenginecombustionchamber
tolowercombustiontemperatures.
WhatisDieselExhaustFluid(DEF)/AdBlue®?
DEF/ADBLUE®isaclear,colorless,non-toxic,aqueousureasolution(32.5%)withaslightammoniaodor.Itisused
tochemicallyreduceNOxemissionsfromheavy-dutydiesel-poweredvehicles.DEF/ADBLUE®isneitherexplosive
norharmfultotheenvironment.DEF/ADBLUE®isclassiedundertheminimum-riskcategoryoftransportableuids.
InternationalstandardISO22241-1denesDEF/
ADBLUE®quality.TheAmericanPetroleumInsti-
tute(API®)hasavoluntarycerticationprogramfor
DEF/ADBLUE®.ToensurethatDEF/ADBLUE®satis-
estherequirementsofISO22241,lookfortheAPI®
DEFCerticationMark™wheneveryoupurchase
DEF/ADBLUE®.APIDieselExhaustFluidCertication
MarkisaregisteredtrademarkofAPIintheUnitedStates
andorothercountries.
FindingDieselExhaustFluid(DEF)/AdBlue®
YourNEWHOLLANDCONSTRUCTIONdealerisfullyequippedtoaccommodateallyourDEF/ADBLUE®needs.
NewHollandConstructionCustomerService:
Call1-888-365-NHCE(1-888-365-6423)oremailcustomerservice.na@cnh.com.
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