Case 1121F - Engine cooling system

7-MAINTENANCE
Enginecoolingsystem
Dependingonthedateofmanufacture,yourcooling
systemmaybeequippedwithconventionalethylene
glycolcoolantsuchasCASEAKCELAPREMIUM
ANTI-FREEZEoranOrganicAcidT echnology(OAT)
coolantsolutionsuchasCASEAKCELAACTIFULL
OT®EXTENDEDLIFECOOLANTwhichiseasilyiden-
tiedbyitsyellowcolor.Thecoolanttypesshouldnever
bemixed.Thedecalshownbelow(CNHpartnumber
47488993)islocatednearthellpointofthecooling
systemwheneverCASEAKCELAACTIFULLOT®
EXTENDEDLIFECOOLANTislledatthefactory.
ThefollowingCNHmaterialspecicationsmustbemetfor
eithercoolantsolutionused:
•
MAT3624forOATcoolant.
•
MAT3620forconventionalcoolant.
Ifyouneedtochangeamachinefromconventional
coolanttoOATcoolantorviceversa,youshouldfollow
the“Changingcoolanttypes”procedurebelowtoattain
thefullbenetofthecoolant.YoushouldnotmixOAT
coolantwithconventionalcoolant.MixingOATcoolant
withconventionalcoolantwillreducetheeffectivenessof
OATcoolant.
NOTICE:Issuesasaresultoffailingtofollowtheabove
guidelineswillnotbecoveredunderwarrantly.
474889934
Changingcoolanttypes
TochangecoolantfromOATcoolanttoconventional
coolant(orviceversa):
1.Emptytheenginecoolingsystembydrainingthe
coolantintoasuitablecontainer.
2.Fillthesystemwithcleanwater.
3.Starttheengineandrunforatleast30min.
NOTE:Ensuretheheatingsystem(ifequipped)isac-
tivatedtocirculateuidthroughtheheatercore.
4.RepeatSteps1to3,foratotaloftwowashes.
5.Fillthesystemwithconventionalcoolant(orOAT
coolant).
6.Operatetheengineuntilitiswarm.Inspectthema-
chineforleaks.
7.IfyouarechangingtoOATcoolant,theattachthelabel
(CNHpartnumber47488993)toindicatetheuseof
OATcoolantinthecoolingsystem.
Denitions
Conventionalcoolant
•
Acoolantthatreliesoninorganicinhibitorssuchassil-
icates,nitritesandphosphatesforcorrosionandcavi-
tationprotection
OrganicAcidTechnology(OAT)coolant
•
Acoolantthereliesoninhibitorssuchasorganicacid
saltsforcorrosionandcavitationprotection.
Anti-freeze/Anti-corrosion
Useanti-freezeinallseasonstoprotectthecoolingsys-
temfromcorrosionandriskoffreezing.Forareaswhere
theambienttemperatureisover-36°C(-32.8°F)usea
blendof50%ethylene-glycolbasedanti-freeze.
Forareaswherethetemperatureisbelow-36°C
(-32.8°F)-itisadvisabletouseablendof40%water
and60%anti-freeze.
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