Toro 2024 - Cooling System Maintenance; Checking Cooling System Components and Coolant Concentration; Draining the Coolant from the System

CheckingtheConditionof
Cooling-SystemComponents
ServiceInterval:Every300hours/Yearly(whichevercomes
rst)
Checktheconditionofthecoolingsystemforleaks,damage,
dirt,andloosehosesandclamps.Clean,repair,tighten,and
replacethecomponentsasnecessary.
CheckingtheConcentrationof
theCoolant
ServiceInterval:Every1,000hours/Yearly(whichever
comesrst)—Checktheconcentration
ofthecoolantbeforethewinterseason.
Testtheconcentrationofethyleneglycol-basedantifreeze
inthecoolant.Ensurethatthecoolanthasa50%ethylene
glycoland50%watermixtureorequivalent.
Note:A50%ethyleneglycoland50%watermixturewill
protecttheengineto-37°C(-34°F)throughouttheyear.
Usingaconcentrationtester,checktheconcentrationof
thecoolantmixturetoensurethatitis50%ethyleneglycol
and50%waterorequivalent;refertothemanufacturer’s
instructionsfortesting.
CleaningtheCoolingSystem
ServiceInterval:Every1,000hours/Yearly(whichever
comesrst)(Cleanthecoolingsystem
ifthecoolantbecomesdirtyorrust
colored.)
DrainingtheCoolantfromtheSystem
Important:Donotpourcoolantontothegroundorinto
anunapprovedcontainerthatcanleak.
1.Parkthemachineonalevelsurface,stoptheengine,
andremovetheignitionkey.
2.Allowtheenginetocool.
3.Openthefronthood.
4.Removetheradiatorcap(Figure101).
5.Placeadrainpanunderthedrainplug(Figure102).
Note:Thecoolantcapacityofboththeengineand
theradiatoris16.8L(17.7USqt).
Figure102
1.Radiatordrainplug
6.Openthedrainplugfortheradiatorandallowthe
coolantsystemtodraincompletely.
Note:Disposeoftheusedcoolantproperlyaccording
tolocalcodes.
7.Cleanthethreadsonthedrainplugandapply3layers
ofPTFEsealingtape.
8.Closethedrainplug(Figure102).
FlushingtheCoolingSystem
Engineandradiatorcoolantcapacity:16.8L(17.7USqt)
1.Parkthemachineonalevelsurface,stoptheengine,
andremovetheignitionkey.
2.Conditionthecoolingsystemasfollows:
A.Ensurethatthecoolantisdrainedfromthe
radiatorandthatthedrainplugisclosed;referto
DrainingtheCoolantfromtheSystem(page79).
B.Addacoolingsystemcleaningsolutiontotheto
theradiatorthroughthellerneck(Figure103).
Note:Usecleaningsolutionof21g(12ozdry)
ofsodiumcarbonateforevery17L(18USqt)
ofwater;otherwise,useacommerciallyavailable
equivalent.Followthedirectionsthatcomewith
thecleaningsolution.
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