Case CX490D - Selective Catalytic Reduction (SCR) System

3-CONTROLSANDINSTRUMENTS
SelectiveCatalyticReduction(SCR)system
TheSCRaftertreatmentsystemisintendedtoabatetheemissionsofNOxintotheengineexhaustgases.
SMIL14CEX2523EB1
1.Engine
2.DEF/AdBlue®tank
3.DEF/AdBlue®dosingcontrolunit
4.SCRcatalystblock
BysprayingDEF/AdBlue®uidintotheexhaustgasespriortoacatalystblock,theNOxmoleculesreactinsidethe
catalystwiththeammoniacontainedintheDEF/AdBlue®,thankstothehightemperaturesgeneratedbytheexhaust
gases.TheNOxarethusconvertedtoharmlesselementalNitrogenandwater.
Makesurenottodamage,modifyorremoveanycomponentrelatedtotheSCRaftertreatmentsystem.
NOTICE:DonotkickorhittheSCRcatalystblockinordernottoseverelydamageit.
NOTICE:Dependingonmachineusage,rustmayformontheexhaustpipeand/orfastenersearlierthanexpected,
evenonnewmachines.Ifanyvisibleabnormalityisfound,contacttheCASECONSTRUCTIONdealerimmediately.
NOTICE:Donotchangethelengthororientationoftheairintakelinetotheengine,oroftheexhaustlinefrom
theengine.ThefunctionoftheSCRsystemmaybenegativelyaffected.Donotremoveormodifycomponentsof
equipmentrelatedtotheexhaustemissioncontrolsystem.
NOTICE:Donottouchthewaterreleasedfromthemufer.Thiswaterisslightlyacidicduetotheactionofthe
oxidationcatalystbuiltintothemufer.Ifthewaterfromthemuferhascomeincontactwithyourskin,etc.,rinsethe
affectedareawithamplewater.
3-78