Toro 09920 Operator's Manual

FormNo.3362-258RevA

ProCoreSR48,SR54,SR54–S,
SR70,SR70–S,SR72and
SR75–HDAerators

ModelNo.09920—SerialNo.290000001andUp

ModelNo.09921—SerialNo.290000001andUp

ModelNo.09922—SerialNo.290000001andUp

ModelNo.09924—SerialNo.290000001andUp

ModelNo.09925—SerialNo.290000001andUp

ModelNo.09926—SerialNo.290000001andUp

ModelNo.09927—SerialNo.290000001andUp

ToregisteryourproductordownloadanOperator'sManualorPartsCatalogatnocharge,gotowww.T oro.com.OriginalInstructions(EN)

Introduction

Readthisinformationcarefullytolearnhowtooperate
andmaintainyourproductproperlyandtoavoidinjury
andproductdamage.Youareresponsibleforoperating
theproductproperlyandsafely.

Thismanualidentiespotentialhazardsandhas
safetymessagesidentiedbythesafetyalertsymbol
(Figure2),whichsignalsahazardthatmaycauseserious
injuryordeathifyoudonotfollowtherecommended
precautions.

YoumaycontactTorodirectlyatwww .T oro.comfor
productandaccessoryinformation,helpndinga
dealer,ortoregisteryourproduct.

Wheneveryouneedservice,genuineToroparts,or
additionalinformation,contactanAuthorizedService
DealerorToroCustomerServiceandhavethemodel
andserialnumbersofyourproductready .Figure1
identiesthelocationofthemodelandserialnumbers
ontheproduct.Writethenumbersinthespace
provided.

Figure2

1.Safetyalertsymbol

Thismanualuses2otherwordstohighlightinformation.
Importantcallsattentiontospecialmechanical
informationandNoteemphasizesgeneralinformation
worthyofspecialattention.

1.Modelandserialnumberlocation

ModelNo.

SerialNo.

Figure1

©2009—TheT oro®Company
8111LyndaleAvenueSouth
Bloomington,MN55420

Contactusatwww.T oro.com.

2

PrintedintheUSA.

AllRightsReserved

Contents

Introduction.................................................................2

Safety...........................................................................4

SafeOperatingPractices.......................................4

SafetyandInstructionalDecals.............................6

Setup............................................................................8

1ConnectingtheLowerLinkArms......................9

2ConnectingtheHydraulicTopLink

(ModelsSR48,SR54,SR70,SR72and

SR75–HD........................................................9

3ConnectingtheTractorUpperLink(Models

SR54–SandSR70–S)......................................11

4VerifyingtheTopLinkSetUp..........................11

5CheckingthePTOAngle.................................12

6FittingthePTOshaft.......................................12

7InstallingthePTOShield.................................14

8ConnectingthePTOShaft...............................15

9AdjustingtheSwayLinks.................................16

10LevelingtheAeratorSide-to-Side...................17

11InstallingtheTines.........................................17

12RemovingtheStorageStands(Models

SR54,SR54S,SR70andSR70–S).....................18

13RemovingtheStorageStands(Models

SR72).............................................................18

ProductOverview......................................................19

Specications.....................................................19

Attachments/Accessories...................................19

Operation...................................................................20

TractorControls.................................................20

PrinciplesofOperation......................................20

TractorPTOSpeed............................................20

TrainingPeriod...................................................20

BeforeAerating..................................................20

AeratingProcedures...........................................21

OperatingTips...................................................21

SubsoilCultivation.............................................22

HardGround.....................................................22

Longer/LargerTines..........................................22

MultiRowAdapterHeads..................................22

RootZoneLifting..............................................22

AdjustingtheTineAngle....................................22

TransportOperation..........................................23

InspectionandCleanupafterUse........................23

Maintenance...............................................................24

RecommendedMaintenanceSchedule(s)................24

LiftingtheMachine............................................24

GreasingtheBearings.........................................25

CheckingtheGearboxOil..................................25

ChangingtheGearboxOil..................................26

Inspecting/AdjustingtheDriveChain................26

AdjustingthePTOClutch..................................27

CheckingtheCoringHeadFastener

Torque...........................................................27

CheckingtheSprings..........................................28

AdjustingtheHoleSpacing.................................28

RemovingtheAeratorfromtheTractor...............28

TroubleShooting...............................................29

Storage.......................................................................30

3

Safety

Improperuseormaintenancebytheoperatoror
ownercanresultininjury.Toreducethepotential
forinjury,complywiththesesafetyinstructions
andalwayspayattentiontothesafetyalert
symbol,whichmeansCAUTION,WARNING,or
DANGER-"personalsafetyinstruction."Failureto
complywiththeinstructionmayresultinpersonal
injuryordeath.

SafeOperatingPractices

BeforeOperating

•OwnersofthisAeratormustgiveoperatorsand
employeesfulloperationandsafetyinstructions
beforeallowingthemtooperatethismachineandat
leastannuallythereafter.Anoperatorwhohasnot
readandfullyunderstoodalloperatingandsafety
instructionsisnotqualiedtooperatethismachine.
Becomefamiliarwithallcontrolsandknowhowto
stopquickly.

•Donotallowchildrentooperatethemachine.Do
notallowadultstooperatethemachinewithout
properinstruction.

•Removealldebrisorotherobjectsthatmight
interferewithoperation.Keepallbystandersaway
fromtheworkarea.

•Locateandmarkallundergroundobstructionssuch
asirrigationcomponents,electricalortelephone
lines.

•Makesuretractorisinneutralandparkingbrake
appliedbeforestarting.RefertoTractorOperator’s
Manualforsafestartingprocedures.

•Ensurethatyourtractorissuitableforusewithan
implementofthisweightbycheckingwithyour
tractorsupplierormanufacturer.

•Mountingtheaeratortotherearofthetractor
willdecreasetheweightonthetractorfrontaxle.
Toassureadequatesteeringcontrolandstability
itmaybenecessarytoaddballasttothefrontof
thetractor.RefertoTractorOperator’sManualfor
ballastrequirements.

•Keepallshieldsandsafetydevicesinplace.Ifa
shield,safetydeviceordecalisdamaged,repairor
replaceitbeforeoperationiscommenced.Also
tightenanyloosenuts,boltsandscrewstoensure
machineisinsafeoperatingcondition.

•Donotoperatemachinewhilewearingsandals,
tennisshoes,sneakersorshorts.Also,donot
wearloosettingclothingwhichcouldgetcaught

inmovingparts.Alwayswearlongpantsand
substantialshoes.Wearingsafetyglasses,safety
shoes,hearingprotectionandahelmetisadvisable
andmayberequiredbysomelocalordinancesand
insuranceregulations.

WhileOperating

•Neveroperatethetractorinreversewhentheaerator
islowered.

•Keepallbystandersandpetsawayfromthework
area.

•Usingthemachinedemandsattention,andto
preventlossofcontrol:

–Useonlyindaylightorwhenthereisadequate

articiallight.
–Watchforholesorotherhiddenhazards.
–Donotoperatethemachineclosetoasandtrap,

ditch,creekorotherhazard.
–Reducespeedonsidehillsandbeforemaking

sharpturnstopreventtippingorlossofcontrol.
–Lookbehindtheaeratorbeforebackingup.

•Ifthetinesstrikeasolidobjectorthemachine
vibratesabnormally,disengagethePTO ,setthe
parkingbrakeandshuttheengineoff.Removekey
fromignitionswitch.Checkaeratorandtractionunit
fordamage.Repairanydamagebeforerestartingthe
engineandoperatingthetines.Besuretinesarein
goodconditionandallboltsaretight.

•Beforeleavingmachineunattended,disengagepower
toaerator,loweraeratorontostoragestandsandset
parkingbrake.Stopengine.

•Neverdismountwhiletractorisinmotion.Never
getonorofftractorwhileengineisrunningand
PTOdriveshaftisengaged.NeverstepoverPTO
shafttoreachothersideofaerator-walkaround
themachine.

•Whenliftingtheaerator,disengagethePTOwhen
therollerisapproximately5”fromtheground.

•Donotoperatethismachinewithouttherolleron
theground.Neveroperatewiththemachinein

theraisedposition.

•Parktheaeratoronahard,levelsurface,installthe
aeratorstoragestandsbeforedisconnectingfrom
tractor.

•Ifitisnecessarytoprobebelowthesoilsurface,use
anonconductivematerialtopreventelectricalshock
incaseelectricalwiresarepresent.

•Alwayslowertheaeratortothegroundbefore
leavingthetractorunattended.Neverleavethe
aeratorintheraisedpositionwhenitisunattended.

4

Transporting

•Theaeratorisheavy.Whenattachedtoatractor
andintheraisedposition,itsweightwillaffect
stability,brakingandsteering.Exercisecautionwhen
transportingbetweenworkingareas.

•Alwaysmaintainpropertractortirepressure.

•Besureyouareincompliancewithallregulations
beforetransportingequipmentonthepublicroads
andhighways.Makesureallrequiredreectors
andlightsareinplaceandarecleanandvisibleby
overtakingandoncomingtrafc.

•Neverallowpassengerstorideonthemachine
duringtransport.

•Reducespeedonroughroadsandsurfaces

•Independentwheelbrakesshouldalwaysbelocked
togetherwhentransporting.

PTOShaft

•ForallPTOshaftsteelparts(tubes,bearings,joints
etc.)disassemblyorrepairs,itishighlyadvisable
tocontactyourlocalTorodistributor.Removalof
componentsforrepairsandreassemblymaydamage
somepartsifnotperformedwithspecialtoolsby
trainedtechnicians.

•ThePTOshaftmustnotbeusedwithouttheguards
supplied,withpartialprotectionorwithdamaged
guards.OnCEmachines,operationisprohibited
withoutthespecialanti-rotationchainscorrectly
installed,soastopermitthemaximumangleofthe
PTOshaftwithoutbreakingthechains.

•Besurethemachineisinsafeoperatingconditionby
keepingnuts,boltsandscrewstight.Checkthetine
mountingboltsdailytobesuretheyaretightened
tospecication.

•Donotcheckoradjustthechaintensionwhenthe
tractorengineisrunning.

•Besureallguardsarereplacedandthehoodis
securedshutaftermaintainingoradjustingthe
machine.

•Performonlythosemaintenanceinstructions
describedinthismanual.Ifmajorrepairsare
everneededorassistanceisdesired,contactan
AuthorizedToroDistributor.Toensureoptimum
performanceandsafety,alwayspurchasegenuine
Tororeplacementpartsandaccessoriestokeepthe
ToroallToro.Neveruse"will-t"replacementparts
andaccessoriesmadebyothermanufacturers.Look
fortheTorologotoensuregenuineness.Using
unapprovedreplacementpartsandaccessoriescould
voidthewarrantyofTheT oroCompany.

StorageSafety

•Storetheaeratoronthestoragestandspositionedon
armlevelsurface.

•Storetheaeratorawayfromareasofhumanactivity.

•Donotallowchildrentoplayonoraroundthe
storedmachine.

•Makesuretheaeratorispositionedonrmandsolid
groundsoitdoesnotsinkortipover.

•Frictionclutchesmaybecomehotduringuse.Do
nottouch.Toavoidtheriskofre,keepthearea
aroundtheclutchfreeofammablematerialand
avoidprolongedslippingoftheclutch.

Maintenance

•Beforemakingadjustmentsorperforming
maintenanceontheaerator,switchofftheengine,
stopthePTOandapplytheparkingbrakebefore
dismountingfromthetractor.Besuretheaeratoris
onthegroundorloweredontothesafetystands.

•Supportthemachinewiththeblocks,jacksoron
storagestandswhenworkingbeneathit.Never

relyonthetractor’shydraulicstosupportthe
machine.

•Placeallcontrolsinneutral,stoptheengine,apply
parkingbrakeandwaitforallmovingpartsto
stopbeforeservicing,maintaining,adjustingor
unblockingtheaerator.

5

SafetyandInstructionalDecals

Safetydecalsandinstructionsareeasilyvisibletotheoperatorandarelocatednearanyareaof
potentialdanger.Replaceanydecalthatisdamagedorlost.

117–7052

1.ReadtheOperator’sManual,donotoilthechaindrive.

100–3612

1.Entanglementhazard—stayawayfrommovingparts,keep
allguardsandshieldsinplace.

110-4668

1.Entanglementhazard,shaft—stayawayfrommovingparts.

2.PTOspeedandinputdirection.

3.Usecliptosecurelashcablewhennotinuse.Uselash
cabletosupportthepowertake-offwhenthemachineis
disconnectedfromtractor.

117–7051

1.Crushinghazardofhandorfoot—keepbystandersasafe
distancefromthemachine.

117–7050

1.Warning—readtheOperator’sManual.

2.Warning—removetheignitionkeyandreadtheinstructionsbeforeservicingorperformingmaintenance.

3.Warning—donotoperatethismachineunlessyouaretrained.

4.Entanglementhazard,belt—stayawayfrommovingparts,keepallguardsinplace.

5.Crushinghazardofhandorfoot—keepbystandersasafedistancefromthemachine.

6.Crushinghazardofhandandbody—supportmachineonstandwhennotinuse.

7.Fallinghazard—donotcarrypassengers.

6

92–1581

92–1582

7

Setup

LooseParts

Usethechartbelowtoverifythatallpartshavebeenshipped.

ProcedureDescription

1

2

3

4
5
6
7

8

Hitchpin2
Lynchpin2
Hydraulictoplink1
Hydraulichose,3–1/2feet
Hydraulichose,2–1/2feet
Extensionbracket2
Rotationalbracket1
Hosequickcouplings(notincluded)
Springloadedtoplink
Linkpin3
Lynchpin3

Nopartsrequired

Nopartsrequired

PTOshaft

PTOShield

Pin(suppliedwithPTOshaft)
Nut(suppliedwithPTOshaft)

Qty.

Use

ConnectLowerLinkArms

1
1

2
1

–

–

1

1

1
1

ConnectHydraulicT opLink

ConnectUpperLink

Verifythetoplinksetup

CheckingthePTOangle

FittingthePTOshaft

InstallthePTOShield

ConnectPTOShaft

9
10
11
12
13

Nopartsrequired

Level(notsupplied)

Tines

Nopartsrequired

Nopartsrequired

–

1

A/R

–

–

AdjustingSwayLinks

LevelAeratorSide-to-Side

InstalltheTines

RemoveStorageStands

RemoveStorageStands

8

MediaandAdditionalParts

Description

Operator’sManual

PartsCatalog

SpringWires-SR54

SpringWires-SR70

SpringWires-SR72

SpringWires-SR72

Allenwrench1

PTOOperatorsManual

1

ConnectingtheLowerLink
Arms

Partsneededforthisprocedure:

2Hitchpin

2Lynchpin

Qty.

1

1

6Replacementspringwires

8Replacementspringwires

4Replacementspringwires

2Replacementspringwires

1

Readbeforeoperatingtheaerator

Usetoreferencepartnumbers

TineheadboltwrenchforSR72

Readbeforeoperatingtheaerator

1.Lowerlink2.Lynchpin

Use

Figure3

Procedure

1.Removetheboltssecuringtheaeratorstoragestands
totheshippingpalletandremovetheaeratorfrom
thepallet.

2.Theaeratormustbepositionedonaat,level
surfaceforinstallation.

3.Backthetractorsquarelyuptotheaeratoruntil
thelowerlinkarmsarealignedwiththemounting
brackets.

4.MakesurethePTOisdisengaged.

5.Engagetheparkingbrake,STOPtheengineand
removethekeyfromtheignition.Waitforthe
engineandallmovingpartstoSTOPbeforeleaving
theOperator’sseatonthetractor.

Note:Formaximumgroundclearance,thehitch
pinsshouldbesecuredintheaeratorlowermounting
bracketholes,whensoequipped.Todetermine
whentousetheuppermountingholes,referto
ConnectingthePTOShaft.

6.Securethelowerlinkarmstotheaeratormounting
bracketswitheitherlynchpins(Figure3)orhitch
pinsandlynchpins(Figure4).

Figure4

1.Hitchpin3.Lowerlink

2.Aeratormountingbracket

9

2

Connectingthe
HydraulicTopLink
(ModelsSR48,SR54,SR70,
SR72andSR75–HD

Partsneededforthisprocedure:

1Hydraulictoplink

1

Hydraulichose,3–1/2feet

1

Hydraulichose,2–1/2feet

2Extensionbracket

1Rotationalbracket

2

Hosequickcouplings(notincluded)

Procedure

Figure5

1.Aeratorhitchpin7.Tractorlinkpin

2.Hydraulictoplink

3.Rotationalblock

4.Connectinglink10.3–1/2foothydraulichose

5.3inchextensionblock

6.5inchextensionblock12.Tractorhydraulicports

8.Clevis&lynchpin

9.2–1/2foothydraulichose

11.Hosequickcouplings(not
included)

Thetractormustbeequippedwithadoubleactingspool
valvewithanoperatorcontrolleverandtwo1/2”(12.7
mm)quick-releasecouplingsattherearofthetractor.It
isalsonecessaryforyoutoprovidetwoquickcouplings
tottothehydraulictoplinkhoses(1/2–14NPTF
hoseendthreadsize).

1.Securetheconnectinglinkendofthehydraulictop
linktothetractorwiththepinssuppliedwiththe
tractor(Figure5).Positionthehydraulictoplinkso
therodendistowardtheaerator.Thecylinderports
shouldbepositionedtowardthetractor’sauxiliary
powerhydraulics.

Note:Ifthehydrauliccylindermustbepositioned
withtheportsfacingupward,usetherotational
blockinsteadofthestandardmountingblockto
repositionthecylinder(Figure5).

Installtherotationalblockasfollows:

A.Removethecotterpinandpinsecuring

thestandardconnectinglinktothecylinder
(Figure5).Removetheconnectinglinkfromthe
cylinder.

B.Installtherotationalblocktothecylinderwith

thepinspreviouslyremoved(Figure5).

2.Connectthe3–1/2footlonghydraulichosetothe
hydraulictoplinkportwhichisclosesttotheaerator
Figure5.ApplyTeontapeorpipethreadsealantto
thehosethreadstopreventanyleaks.

3.Connectthe2–1/2footlonghydraulichosetothe
hydraulictoplinkportwhichisclosesttothetractor
(Figure5).ApplyTeontapeorpipethreadsealant
tothehosethreadstopreventanyleaks.

4.Installquickcouplings(notincluded)tothehydraulic
hoses(1/2–14NPTFhoseendthreadsize).

5.Connectthetwohydraulichosequickcouplingsto
theportsprovidedonthetractor.

6.Startthetractorengineandoperatethetractorspool
valvetochecktheextendandretractmotionofthe
hydraulictoplink.

Note:Reversethehoseconnectionsiftheydono
agreewiththetractorcontroloperation.

7.Securetherodendofhydraulictoplinktothemost
forwardholepossibleintheaeratorbracketwithlink
pinandlynchpin(Figure6).

Important:Whensecuringtherodendof
thehydrauliclink,makesuretousethemost
forwardmountingholesinthemountingbracket
sothereisenoughclearanceforthebarrelofthe
cylinderwhenretracted.

10

Figure6

1.Rodendofcylinder4.Aeratorbracket(forward
holes)

2.Lynchpin5.Linkpin

3.Linkpin

Ifthehydrauliccylinderdoesnotreachtheaerator
mountingbracket,useanextensionblockinsteadof
thestandardmountingblocktoconnectthecylinder
tothetractor(Figure5).

3

Connectingthe
TractorUpperLink
(ModelsSR54–SandSR70–S)

Partsneededforthisprocedure:

1

Springloadedtoplink

3Linkpin

3Lynchpin

Procedure

1.Mountthespringloadedtoplinktotheaerator
bracketwithtwolinkpinsandlynchpins(Figure7)

2.Loosenthelocknutonthetractorupperlink.Adjust
theupperlinkuntilitalignswiththeclevisonthe
springloadedtoplinkoftheaerator(Figure7).

Installtheextensionblocksasfollows:

A.Removethecotterpinandpinsecuring

thestandardconnectinglinktothecylinder
(Figure5).Removetheconnectinglinkfromthe
cylinder.

B.Installtherequiredlengthextensionblockto

thecylinderwiththepinspreviouslyremoved
(Figure5).

Figure7

1.Springloadedtoplink

2.Upperlink5.Locknut

3.Linkpin

3.Connectthetractorupperlinktotheclevisonthe
springloadedtoplinkandsecurewithalinkpinand
lynchpin(Figure7).

4.Greasethethreadedsteelupperlinktubes.

5.Measurethelengthofthespringinthetoplink.

6.Rotatetheupperlinkuntilthespringiscompressed
byabout1/2inch(Figure7).

4.Lynchpin

7.Tightenthelocknuttosecuretheupperlinkinto
position.

11

4

VerifyingtheTopLinkSetUp

NoPartsRequired

Procedure

•Extendingthehydrauliccylinderwillincreasethe
tinedepth.

•Fullyextendthehydrauliccylindertodetermine
thelocationofthetineheadsandtoverifyifthey
contacttheground.

Ifthetineheadscontacttheground,turf
damagewilloccur.

Figure8

1.Breakagewilloccurhere

5

CheckingthePTOAngle

Note:Onundulatingturf,theoperatorcanadjust

thecylindertomaintaintinedepth(crestingahill)
butitwillbenecessarytohavethetineheadsset
about2inchesbelowground.

•Ifthetineheadscontacttheground,adjustthe
locationofthecylinderendstomovethetopofthe
aeratorclosertothetractor.

•Ifthetineheadsdonotcontacttheground,
extensionbrackets(includedwithaerator)canbe
installedtothetoplinktomovethetineheadscloser
totheground.

Important:WhenconnectingthePTO,besure
thattheaeratorisnotbeingliftedhigherthanis
necessary.Liftingthemachinetoohighwillcause
thePTOshaftknucklestobreak(Figure8).Never
leavethePTOturningwhentheaeratorislifted.
ThePTOcanbeoperateduptoanangleof25º,but
canneverexceeda35ºanglewhentheaeratoris
atitshighestpositionorsevereshaftdamagemay
occur.

NoPartsRequired

Procedure

Withtheaeratorpositionedonthegroundandlowered
tothedeepestlocation,checktheanglebetweenthe
PTOandtheaerator.Makesurethetinesareremoved
beforeperformingthisoperation.

Lifttheaeratorandfullyretractthehydraulictoplink
cylinder.ChecktheanglebetweenthePTOandthe
aerator.Ifthisangleisgreaterthan35degrees,make
adjustmentstothetractorsothattheaeratorcannotbe
liftedpast35degrees.Thiscanbeaccomplishedby
usingthetractorliftstop(ifsoequipped)ormovingthe
lowerlinkstoahighermountinghole(ifsoequipped).

6

FittingthePTOshaft

Partsneededforthisprocedure:

1

PTOshaft

Procedure

1.Movethetractorandaeratortoalevelsurface.

2.Raisetheaeratorcompletelyandfullyretractthetop
linkcylinderorupperlink(Figure9).

12

Figure9

Figure12

1.Measurehere

3.Measurethedistancefromthereliefontheendof
thetractorPTOshafttothereliefontheaerator
gearboxPTOshaft(Figure10).Recordthisdistance.
Example:26.5inches(67cm).

Figure10

1.Measurehere

4.Lowertheaeratortothegroundandfullyextendthe
toplinkcylinderorupperlink(Figure11).

6.OnthePTOshaft,measurethedistancefromthe
centeroflockingpinballononeendtothecenterof
thelockingpinbuttonontheotherend(Figure13).
Recordthisdistance.Example:32inches(81cm).

Figure13

1.Measurehere

7.Usingthesmallerofthetwomeasurementsin
Figure12andFigure10,subtractthatdistancefrom
thedistanceinFigure13.Example32(81cm)inches
minus26.5inches(67cm)equals5.5inches(14cm).

8.Theexamplemeasurementsshowthattheshaftis

5.5inchestoolong.Nowyouwillneedtoaddan
extra1/2inch(1.2cm)tobesurethatthePTOshaft
willnotbottomoutwhentheaeratorisliftedtoits
highestposition.

Figure11

5.Measurethedistancefromthereliefontheendof
thetractorPTOshafttothereliefontheaerator
gearboxPTOshaft(Figure12).Recordthisdistance.
Example:27.5inches(70cm).

Example:5.50inches(14cm)plus1/2inch(1.2cm)
equals6.00inches(15cm).

9.SlidethePTOshafttubestogetheruntiltheyare
fullycollapsed.V erifythattheinsidetubedoesnot
protrudeintothecrossandbearingsectionofthe
outertube(Figure14).Ifthishappens,cutmoreoff
theinsidetube,tocorrecttheproblem.

13

Figure14

1.Insidetube

10.SeparatethetwohalvesofthePTOshaft(Figure15,
illustration1).

11.Measurethedistancefromtheendofeachtubeto
itssafetyshield(Figure15,illustration1).Record
thedistances.

12.Usingthedimensionsdeterminedinstep8,locate,
markandcutofftheshieldandtubefromeachPTO
half(Figure15,illustrations2&3).

Note:Morewillhavetobecutofftheinsidetube
onlyifitisprotrudingintothecrossandbearing
sectionoftheoutertube.

13.Usingthedimensionsdeterminedinstep11,locate,
markandcutoffjustthesafetyshieldstoexposethe
tubesFigure15—illustrations4&5.

14.Carefullydeburrtheendsofthetubeswithaleand
removeallthelingsfromthetubes.

15.Greasetheinsidetube.

Note:Telescopingtubesmustalwaysoverlapby
1/2oftheirlengthinnormaloperationandatleast
1/3oftheirlengthinallworkingconditions.During
transport,whenthedrivelineisnotrotating,the
telescopingtubesmusthaveasuitableoverlapto
maintainthetubesalignmentandallowthemtoslide
freely.

1.Measurehere

Figure15

7

InstallingthePTOShield

Partsneededforthisprocedure:

1

PTOShield

Procedure

1.Removethe4bolts,lockwashersandatwashers
securedtotherearoftheaeratorgearbox(Figure16).

14

Figure16

1.PTOshield

2.Flatwasher5.Accesspanel

3.Lockwasher

4.Bolt

2.MountthePTOshieldtotheaeratorgearboxwith
thefastenerspreviouslyremoved(Figure16).When
mountingthePTOshield,makesuretheaccess
panel(Figure16)ispositionedtothetoporside
dependingontheaeratorframeconguration.

8

ConnectingthePTOShaft

Partsneededforthisprocedure:

1

Pin(suppliedwithPTOshaft)

1

Nut(suppliedwithPTOshaft)

Figure17

1.Gearboxinputshaft

2.PTOshaftcoupler

3.Pin

4.Nut

Note:MakesuretocloseandlatchthePTOshield
accesspanelifopened.

3.ConnectthePTOshafttothetractorPTOshaft
(Figure18).

Procedure

Note:Theaccesspanel(Figure16)canbeopened

toeasetheremovalandinstallationofthePTOshaft
mountingfasteners.

1.RemovethepinandnutfromthePTOshaft
(Figure17).

2.ConnecttheclutchendofthePTOshaftto
theaeratorgearboxinputshaftwithpinandnut
previouslyremoved(Figure17).Thepincanonly
beinsertedoneway.

Figure18

1.Tractoroutputshaft3.PTOshaft

2.PTOshaftcoupler

4.SlidethePTOshaftforwardasfarasthetractor
allows.

5.PullbackonthelockingcollartosecurethePTO
shaftinplace.SlidethePTOshaftbackandforthto
makesureitisproperlylocked.

6.ConnecttheshieldsafetychainstothePTOshield
andthetractorbracket(Figure19).Makesurethe
chainsremainslackwhentheaeratorisraisedor
lowered.

15

Figure19

1.Safetychains

Note:Toavoidexcesslift,connecttheliftarmsof
thetractorintothetopholesoftheliftbracket,if
soequipped(Figure20).Themaximumangleon
thePTOshaftis35º.

Figure20

1.Topholes

Figure21

1.Breakagewilloccurhere

9

AdjustingtheSwayLinks

NoPartsRequired

Procedure

Theaeratorisdesignedtobecenteredwiththetractor
PTOshaftcenterline.Adjusttheswaylinksasrequired.

ThePTOshaftshouldbeasstraightaspossibletothe
tractorPTOshaft.

Important:WhenconnectingthePTO,be
surethattheaeratorisnotbeingliftedhigher
thanisnecessary.Liftingthemachinetoohigh
willcausethePTOshaftknucklestobreak
(Figure21).NeverleavethePTOturningwhen
theaeratorislifted.ThePTOcanbeoperated
uptoanangleof25º,butcanneverexceeda35º
anglewhentheaeratorisatitshighestposition.

7.VerifythatthePTOshielddoesnotinterferewith
theclutch.

Adjusttheswaylinksonthelowerliftarmstominimize
side-to-sideswaytoamaximumof1inch(25mm)on
eachside(Figure22).

Figure22

1.Swaylink

16

Adjustthelowerlinksinboarduntiltheycontactthe
aeratormountingplates.Thiswillreducethestress
onthepins.Ifthetractorhasswaychainsinsteadof
swaylinks,itisrecommendedthatwashersbeinstalled
betweenthelowerlinkarmandlynchpintoreducethe
overhungloadontheliftpins.

11

InstallingtheTines

Note:RefertothetractorOperator’sManualfor

additionalinstallationandadjustmentprocedures.

10

LevelingtheAerator
Side-to-Side

Partsneededforthisprocedure:

1

Level(notsupplied)

Procedure

1.Parkthetractorandaeratoronalevel,rmsurface.

2.Placealevelontopoftheaeratorframetocheckfor
levelside-to-side(Figure23).

Partsneededforthisprocedure:

A/R

Tines

Procedure

Awideselectionoftinesareavailablefortheaerator.
Choosethetinetype,sizeandspacingsrequiredforthe
job.RefertothePartsCatalogforthelistofaccessories.

1.Makecertaintheaeratorisfullysupportedonthe
ground,standsorsupportblocks.

2.Turnoffthetractorengineandremovethekey .

Avoidstandingtooclosetotherearofthe
machinewheninstallingtines.

3.Loosentheclampingboltsandremovethepreviously
usedtines(Figure24).

Figure23

1.Level

3.Turntheadjustablelinkbody(ifprovided)toraise
orlowerthelinkarmuntiltheaeratorisleveled
side-to-side.

Note:RefertotractorOperator’sManualfor
additionaladjustmentprocedures.

Figure24

1.Clampingbolt

4.Slidethenewtinesintotheholessizedtotthe
tinesselected.Neverusesmalldiametertinesinthe
largediameterholes-thetinesshouldtcloselyin
thehole.Besuretoslidethetineupintothehead
untilitbottomsout.

Note:Hollowcoringtinesshouldbepositioned
withtheejectionslottotherearwhilethesolidtines
shouldhavethetinetipanglefacingthemachine.

5.Tightentheclampingboltsrmlytosecurethetines.

17

2.Tine

6.Setthetineangleforthenewtines.Referto
AdjustingtheTineAngleintheOperationsection.

7.Beforeaeratingformalturfforthersttimeafter
installingtines,testtheaeratoronalessimportant
areasothatyoucantryalternativetractorgearsand
netunetheadjustmenttoachievetheholespacing
andturfappearancedesired.

12

RemovingtheStorageStands
(ModelsSR54,SR54S,SR70
andSR70–S)

NoPartsRequired

Procedure

1.Raisetheaeratorroller(s)3-6inchesoffground.
Placesupportblocksundertheroller(s).

2.Removethebolts,lockwashersandnutssecuringthe
storagestandstoeachendoftheaerator(Figure25).

13

RemovingtheStorageStands
(ModelsSR72)

NoPartsRequired

Procedure

1.Raisetheaeratorroller(s)3-6inchesoffground.
Placesupportblocksundertheroller(s).

2.Removetheboltsandnutssecuringthestorage
standstoeachendoftheaerator(Figure26).

Figure25

1.Bolts3.Nut

2.Lockwasher

3.Removethestoragestands.

4.Usethestoragestandswhenevertheaeratoris
removedfromthetractor.

4.Storagestand

Figure26

1.Bolts3.Nut

2.Lockwasher

3.Removethestoragestands.

4.Usethestoragestandswhenevertheaeratoris
removedfromthetractor.

Note:Whenreinstallingthestoragestands,make
suretheyaremountedtotheinsideoftheroller
platessothelowerframetubewillrestonthetopof
thestands.

4.Storagestand

18

ProductOverview

Specications

Note:Specicationsanddesignaresubjecttochangewithoutnotice.

withPTO&TopLink

WorkingWidth48”

WorkingDepth

(Adjustable)

HoleSpacing

Productivity25,000

Recommended

TractorSize

Recommended

LiftCapacity

Recommended

CounterWeight

Recommended

PTOSpeed

ActualWorking

Speed@400

PTORPM

(Varieswithhole

LiftSystemStd.3–pointStd.3–pointStd.3–pointStd.3–pointStd.3–pointStd.3–pointStd.3–point

ProCore

SR48

Weight

spacing)

1,450lbs.

(655kg)

(1.22m)

1”-14”

(25–300mm)

3”-6”

(75–150mm)

sq.ft./hr.

(2,325

sq.m/hr.)

25HP16–18HP18HP25–35HP25–35HP45HP55+HP

1,800lbs.

(817kg)

300lbs.
(135kg)

400–500rpm400–500rpm400–500rpm400–500rpm400–500rpm400–460rpm400–500rpm

.8–1.3mph1.5–2.5mph1.5–2.5mph1.5–2.5mph1.5–2.5mph.8–1.5mph.8–1.5mph

ProCore

SR54

990lbs.
(450kg)

(1.37m)

1”-10”

(25–250mm

2.5”-4”

(64–102mm)

36,000

sq.ft./hr.

(3,345

sq.m/hr.)

1,200lbs.

(544kg)

150lbs.

(70kg)

ProCore

SR54–S

1,250lbs.

(567kg)

54”

54”

(1.37m)

1”-10”

(25–250mm

2.5”-4”

(64–102mm)

36,000

sq.ft./hr.

(3,345

sq.m/hr.)

1,500lbs.

(680kg)

150lbs.

(70kg)

ProCore

SR70

1,500lbs.

(681kg)

(1.85m)

1”-10”

(25–250mm

2.5”-4”

(64–102mm)

48,000

sq.ft./hr.

(4,460

sq.m/hr.)

1,700lbs.

(771kg)

250lbs.
(115kg)

ProCore

SR70–S

1,655lbs.

(750kg)

73”

73”

(1.85m)

1”-10”

(25–250mm

2.5”-4”

(64–102mm)

48,000

sq.ft./hr.

(4,460

sq.m/hr.)

1,800lbs.

(817kg)

250lbs.
(115kg)

ProCore

SR72

1,985lbs.

(900kg)

(1.83m)

1”-16”

(25–400mm)

3”-6”

(75–150mm)

38,000

sq.ft./hr.

(3,530

sq.m/hr.)

2,800lbs.
(1,270kg)

300–500lbs.

(135–225kg)

ProCore
SR75HD

3,250lbs.
(1,475kg)

72”

78”

(1.98m)

1”-16”

(25–400mm

3”-6”

(75–150mm)

48,000

sq.ft./hr.

(4,460

sq.m/hr.)

4,000lbs.
(1,815kg)

700–900

(315–410kg)

Attachments/Accessories

AselectionofToroapprovedattachmentsand
accessoriesareavailableforusewiththemachineto
enhanceandexpanditscapabilities.Contactyour
AuthorizedServiceDealerorDistributororgoto
www.Toro.comforalistofallapprovedattachments
andaccessories.

19

Operation

Note:Determinetheleftandrightsidesofthe

machinefromthenormaloperatingposition.

TractorControls

ontherevcounters.SincetheengineandPTOrpms
aredirectlyproportional,youcandeterminetheengine
rpmrequiredfora400rpmPTObycalculatingas
follows:

(Enginerpmat540PTOspeed)x(400÷540)=requiredengine
rpm

Itisnecessarytofamiliarizeyourselfwiththeoperation
ofthefollowingtractorcontrolsbeforeyouareableto
operatetheaerator:

•PTOEngagement

•Engine/PTORpm

•3PointHitch(Raise/Lower)

•AuxiliaryValveOperation

•Clutch

•Throttle

•GearSelection

•Parkingbrake

Note:RefertotractorOperator’sManualfor
operatinginstructions.

PrinciplesofOperation

Thetractor’sthreepointhitchlinkage/hydraulictop
linkliftstheaeratorfortransportandlowersitfor
operation.

Thetractor’spowertakeoff(PTO)poweristransmitted
viashafts,gearboxandO-ringdrivechainstoa
crankshaftwhichdrivesthetineholdingarmsintothe
turfsurface.

AsthetractortravelsforwardwiththePTOengaged
andthemachinelowered,aseriesofholesarecreated
intheturfsurface.

Forexample,iftheenginerpmwere2700foraPTO
speedof540rpm,youwouldget:

2700x(400÷540)=2000rpm

Inthisexample,runningyourtractorat2000rpmnow
providesyouwitha400rpmPTOspeed.

Ifyourtractorindicatessomeotherenginerpmat540
PTOrpm,substitutethatnumberforthe2700thatwas
usedabove.

TrainingPeriod

Beforeusingtheaerator,ndaclearareaandpractice
usingthemachine.Operatethetractoratrecommended
gearsettingsandPTOdrivespeedsandbecome
thoroughlyfamiliarwithmachinehandling.Practice
stoppingandstarting,raisingandloweringtheaerator,
disengagingthePTOdriveandaligningthemachine
withpreviouspasses.Apracticesessionassures
condenceintheperformanceoftheaeratorandhelps
ensureuseofproperoperatingtechniqueswherever
themachineisoperated.

Iftherearesprinklerheads,electricalorcommunication
linesorotherobstructionsintheareatobeaerated,
marktheseitemstoensuretheyarenotdamagedduring
operation.

Thedepthofthetine’spenetrationisdeterminedby
extendingthehydraulictoplinkorsettingthexedtop
linktothedesiredposition.

Note:Donotattempttoadjustaxedtoplinkwhile
themachineisrunning.

Thedistancebetweentheholescreatedisdetermined
bythetractor’sgearratio(orhydrostatictractionpedal
position)andthenumberoftinesineachtinehead.
Simplychangingenginerpmdoesnotchangehole
spacing.

TractorPTOSpeed

TheaeratorisdesignedtooperatewithaPTOspeed
ofupto500rpmdependingonthesize/weightofthe
tines.Mosttractorsindicatea540PTOrpmposition

Toavoidpersonalinjury,neverleavethetractor
seatwithoutrstdisengagingthePTOdrive,
settingtheparkingbrakeandstoppingthe
engine.Neverperformaeratorrepairswithout
rstloweringtheaeratorontothestorage
standorappropriateblockingorjacks.Besure
allsafetydevicesaresecuredinproperplace
beforeresumingoperation.

BeforeAerating

Inspecttheareaofoperationforhazardsthatcould
damagethemachineandremovethem,ifpossible,
orplanhowtoavoidthem.Carryreplacementtines,
springwires,springsandtoolsincasetinesaredamaged
duetocontactwithforeignmaterials.

20

Important:Neveroperatetheaeratorinreverseor
whenitisintheraisedposition.

AeratingProcedures

1.Lowertheaeratorsothatthetinesarenearlytothe
groundatthelowestpartoftheirstroke.

2.Atalowtractorenginerpm,engagethepowertake
off(PTO)clutchtostarttheaeratorworking.

3.Selectagearthatgivesaforwardspeedof
approximately.8-2.5M.P .H.(1to4km/hr.)at
theratedPTOspeedof400–500rpm(refertothe
tractorOperator’sManual).

4.Astheclutchisreleasedandthetractormoves
forward,lowertheaeratorfullyontotheroller(s)
andincreaseenginespeedtogiveamaximumof
400–500rpm(460onmodelSR72)atthePTO .

Important:NeveroperatethetractorPTO
inexcessof500rpmordamagetotheaerator
couldoccur.

Important:Makesurethattherollerison
thegroundatalltimeswhentheaeratoris
operating.

5.Notetheholepattern.Ifyourequiregreaterhole
spacing,increaseforwardthespeedofthetractorby
shiftingupagearorwithahydrostaticdrivetractor,
actuatethehydrostatleverorpedaltogivefaster
speed.Forcloserholespacing,decreasetractor
forwardspeed.Changingenginespeed,whilein

thesamegear,willnotchangetheholepattern.

Important:Lookbehindfrequentlyto
ensurethemachineisoperatingproperlyand
alignmentismaintainedwithpreviouspasses.

6.Usethefronttractorwheelasaguidetomaintain
equallateralholespacingwiththepreviouspass.

7.Attheendoftheaerationpass,raisetheaeratorand
quicklydisengagethePTO.

OperatingTips

1.EngagePTOatlowenginespeed.Increaseengine
speedtoachievethedesiredPTOspeedof400–500
rpm(maximum)andtheloweraerator.Operateat
anenginerpmthattheaeratorrunsmostsmoothly .

Note:Changingtheengine/PTOrpmina
particulartractorgear(orxedhydrostaticpedal
positionontractorswithhydrostatictransmission)
willnotchangeholespacing.

2.Makeverygradualturnswhenaerating.Nevermake
sharpturnswithPTOdriveengaged.Planyour
aerationpathbeforeloweringtheaerator.Making
sharpturnswhileaeratingwilldamagetheaerator
andthetines.

3.Iftractor“bogs”downwhenoperatingonhard
groundorgoinguphill,raiseaeratorslightlyuntil
speedisregained,thenloweraeratoragain.

4.Bestresultsareachievedwhenthetineentryisona
slightinclinetowardtherearofthemachine.Use
cautionwhenextendingthehydraulictoplinkto
keepfromhammeringtheturfwiththetineheads.
Insomecases,youmaynotachievethebestresults
fromusingthepre-setholesinthecamberbrackets.
Especiallywherethegrassrootsareshortorweak.
Youmaywanttoexperimentusinganothercamber
settingthatwillsetthetinesonmoreofanincline
tokeepfrompullingsoiloutofthehole.

5.Donotaerateifthegroundistoohardordry.Best
resultsareobtainedafterarainorwhenturfhas
beenwateredthepreviousday.

Note:Iftherollerridesupoffthegroundwhile
aerating,thegroundistoohardtoachievethe
desireddepth,reducetheaerationdepthuntilthe
rollercontactsthegroundduringoperation.

6.Raiseaeratorpenetration,ifgroundishardpacked.
Cleanupcoresandre-aerateatdeeperpenetration,
preferablyafterwatering.

8.Ifyoubackintoatightarea(likeateebox),
disengagethePTOandraisetheaeratortoits
highestposition.Neverattempttoaerateinreverse.

9.Alwayscleartheareaofalldamagedmachineparts,
suchasbrokentines,etc.,topreventanything
frombeingpickedupbymowersorotherturf
maintenanceequipmentandthrown.

10.Replacebrokentines,inspectandcorrectdamageto
thosestillusable.Repairanyothermachinedamage
beforecontinuingoperation.

Toavoidpersonalinjury,neverleavethetractor
seatwithoutrstdisengagingthePTOdrive,
settingtheparkingbrakeandstoppingthe
engine.Neverperformaeratoradjustments
orrepairswithoutrstloweringtheaerator
ontothesafetystand.Besureallsafetydevices
aresecuredinproperplacebeforeresuming
operation.

7.Lookbehindfrequentlytoensurethemachineis
operatingproperlyandalignmentismaintainedwith

21

previouspasses.Alossofonelineofholesindicates
abentorlosttine.Inspectaftereachpass.

8.Alwayscleartheareaofalldamagedmachine
parts,suchasbrokentines,etc.,topreventthem
frombeingpickedupbymowersorotherturf
maintenanceequipmentandthrown.

9.Replacebrokentines,inspectandcorrectdamageto
thosestillusable.Repairanyothermachinedamage
beforecommencingoperation.

SubsoilCultivation

thePTOspeedisaround400–420rpm.Theforward
spacingisnoteffectedbyreducingtheenginespeed.
Thepushedholecanalsobeaffectedbythepositionof
thecamberbracket.RefertoAdjustingtheTineAngle.

MultiRowAdapterHeads

Whenusingmultirowadapterheads,reducetheengine
speeduntilthePTOspeedisaround400–420rpm.
Theforwardspacingisnoteffectedbyreducingthe
enginespeed.

Subsoilcultivation,fracturingor“heave”iscreatedbya
spadingmotionofthetineinthesoilastheaeratorand
tractormoveforward.Qualityofnishontheplaying
surfaceafteraeratingwilldependonvariousfactors
includingturfcondition,rootgrowthandmoisture
content.

HardGround

Ifthegroundistoormtoobtainthedesiredcoring
depth,thecoringheadcangetintoa“bouncing”
rhythm.Thisisduetothehardpanthetinesare
attemptingtopenetrate.Thisconditioncanbe
correctedbyattemptingoneormoreofthefollowing:

•Bestresultsareobtainedafterarainorwhenturf
hasbeenwateredthepreviousday .

•Reducethenumberoftinesperstomper
arm.Attempttomaintainasymmetricaltine
congurationtoevenlyloadthestomperarms.

•Reduceaeratorpenetration(depthsetting)ifground
ishardpacked.Cleanupcores,waterturf,and
aerateagainatadeeperpenetration.

Aerationofsoiltypesbuiltontopofhardsubsoils
(i.e.sand/soilcapplacedoverrockyground)cancause
undesiredholequality.Thisiscausedwhentheaeration
depthisgreaterthanthesoilcapandthesubsoilis
toohardtopenetrate.Whenthetinescontactthis
subsoiltheaeratormayliftandcausethetopofthe
holestobecomeelongated.Reducetheaerationdepth
sufcientlytoavoidpenetrationintothehardsubsoil.

RootZoneLifting

Usingmulti-tineheadsinconjunctionwithlargercoring
tinesorlargediametersolidtinescaninducesignicant
stressontherootzoneoftheturf.Thisstresscan
fracturetherootzoneandcausealiftingactiontothe
turf.Ifthisdamageoccurstryoneormoreofthe
following:

•Reducetinedensity(removesomeofthetines)

•Decreasecoringdepth(suggestedin1/2inch
increments)

•Increaseforwardholespacing(changetractor
transmissionuponegear)

•Decreasethetinediameter(solidorcoring)

AdjustingtheTineAngle

ModelsSR72

Setthecamberbracket(Figure27)tothecorrect
positionbasedonthelengthoftinestobeused.The
headstopissettooneofvepredeterminedpositions
bychoosingtheholethroughwhichtheadjustmentrod
isbolted.Theseholesarepresetsonly;forinstance,
byusinga10inchtineinthe12inchpositionyou
mayachieveasmoothernish;dependingonthe
application.

1.DisengagethePTOandengagetheparkingbrake.

2.Stoptheengineandremovethekeyfromignition
switch.

Longer/LargerTines

Usinglonger/largertinescanleavethefrontorrearof
theholetuftedorslightlydeformed.Holequalityfor
thiscongurationgenerallyimprovesifthecoringhead
speedisreduced10-15%fromfulloperatingspeed.For
PTOpoweredaeratorsreducetheenginespeeduntil

3.Releasethespringtensiontothetinehead
(Figure27).

4.Removethenutandboltintheadjustmentholesin
thecamberbracket(Figure27).

22

Figure27

1.Camberbracket6.12inchtine(Common)

2.14inchtine7.16inchtine

3.12inchtine(Usethis
positionformorelifting
action)

4.7inchtine

5.10inchtine

8.Tineheadpivotbolt

9.Spring

5.Loosenthetineheadpivotbolt(Figure27).

Figure28

1.Bumperbolt

2.Spring

3.Springpinandclip

4.Removethebumperboltandbumperfromthe
linkagearmandreinsertthemintotheother
adjustmenthole(Figure28).

5.Reconnectthespringtensiontothetinehead.

6.Rotatethecamberbracketuntilitisalignedwiththe
desiredholeinthearmandinstalltheboltandnut.

Note:Makesuretheboltgoesthroughthe
chamberbracketandplate.

7.Torquethetineheadpivotboltto300ft-lb.

8.Reconnectthespringtensiontothetinehead.

ModelsSR54,SR54–S,SR70and
SR70–S

Setthetineangleaccordingtothetinelengthbyusing
oneofthetwoadjustmentholesinthelinkagearm.
Theseholesarepresetsonly.Whenusing7inch(17.77
cm)to10inch(25.4cm)tines,theheadbumpershould
bepositionedclosesttotherearofthetinehead.The
otherposition(theholefarthestfromthehead)maybe
neededduetovariancesofsoilconditions.

1.DisengagethePTOandengagetheparkingbrake.

2.Stoptheengineandremovethekeyfromignition
switch.

TransportOperation

Tobegintransportoperation,raisetheaeratorand
disengagethePTO.Toavoidlossofcontrol,traverse
steepinclinesslowly,approachroughareasatreduced
speedandcrosssevereundulationscarefully.

Important:Donotexceedtransportspeedsof15
m.p.h.(24km/hr.).

InspectionandCleanupafter
Use

Afterdailyuse,thoroughlywashthemachinewith
agardenhosewithoutanozzlesocontamination
andsealandbearingdamageduetoexcessivewater
pressurewillbeavoided.Abrushmaybeusedto
removecaked-onmaterial.Usemilddetergenttoclean
thecovers.Aftercleaning,greasealldrivelinesand
rollerbearings,inspectformachinedamage,oilleakage,
componentandtinewear.DonotoiltheO-ring

drivechain.

3.Releasethespringtensiontothetinehead
(Figure28).

Remove,cleanandoilthetines.Sprayalightoilmist
oncoringheadbearings(crank&damperlinks).

Cleanandcoatthespringswithadrylubricantlike
graphiteorsilicone.

23

Maintenance

RecommendedMaintenanceSchedule(s)

MaintenanceService

Interval

Aftertherst8hours

Aftertherst50hours

Beforeeachuseordaily

Every50hours

Every500hours

Beforestorage

Yearlyorbeforestorage

MaintenanceProcedure

•Checkthetorqueofallthecoringheadfasteners

•ChangetheGearboxOil

•Inspectthechaintension

•Checkthesprings

•Cleanandlubricatespringsandtinemountingscrews

•InspectthePTOforsignsofwear .

•GreasethebearingsandPTOshaft

•ChecktheGearboxOil

•Inspectthechaintension

•Checkthetorqueofthecrankpinnutsandthehingebolts.

•Inspectbearings

•ChangetheGearboxOil

•Inspectbearingsandreplaceasneeded

•Performall50hourmaintenanceprocedures

•Chippedsurfaces-Paint

•LoosenthePTOclutchbolts

•Removeandcleantines

•Removealldebris

•AdjustthePTOclutch

LiftingtheMachine

Whenchangingattachmentsorperforming
otherservice,usecorrectblocks,hoistsor
jacks.Makesuremachineisparkedonasolid
levelsurfacesuchasaconcreteoor.Priorto
raisingmachine,removeanyattachmentsthat
mayinterferewiththesafeandproperraising
ofthemachine.Alwayschockorblocktow
vehiclewheels.Usestoragestandsorblocksto
supporttheraisedmachine.Ifthemachineis
notproperlysupported,themachinemaymove
orfall,whichmayresultinpersonalinjury.

Note:Ahoistcanbeusedtolifttheaerator.Use
thecoringheadeyeletasahoistattachmentpoint
(Figure29).Makesurethehoisthasenoughliftcapacity.
Refertothespecicationchartforaeratorweights.

Figure29

1.Coringheadeyelet

24

GreasingtheBearings

ServiceInterval:Every50hours

Themainworkingbearingsoftheaeratoraresealedand
requirenomaintenanceorlubrication.Thisdrastically
reducesthemaintenancerequiredandeliminatestherisk
ofgreaseoroilbeingdroppedontotheturf.

Therearegreasettingsthatmustbelubricatedwith
anSAEmultipurpose,high-temperaturegreasewith
highpressure(EP)performanceorSAEmultipurpose
lithiumbasegrease.

Thelubricationpointsare:

PTOShaft(3)(Figure30)

Figure30

Rollerbearings(Qty .2or4,dependingonmodel)
(Figure31)

Thesealedbearingsrequirenolubricationorshortterm
maintenance.Thisminimizesroutineservicerequired
andreducesthepotentialofturfdamageduetogrease
contamination.Thesesealedbearingpackageswill
providegoodperformanceandlifeundernormaluse,
butperiodicinspectionsofbearingconditionandseal
integrityshouldbeconductedtoavoiddowntime.These
bearingsshouldbeinspectedseasonallyandreplacedif
damagedorworn.Bearingsshouldoperatesmoothly
withnodetrimentalcharacteristicssuchashighheat,
noise,loosenessorrustweeping.

Duetotheoperatingconditionsthesebearing/seal
packagesaresubjectto(i.e.sand,turfchemicals,water,
impacts,etc.)theyareconsiderednormalwearitems.
Bearingsthatfailduetootherthandefectsinmaterialsor
workmanshiparetypicallynotcoveredunderwarranty.

Note:Bearinglifecanbenegativelyaffectedby
improperwashdownprocedures.Donotuse
high-pressureorhighvolumespraydirectlyatthe
bearings.

Itiscommonfornewbearingstopurgesomegrease
outthesealsonanewunit.Thispurgedgreasewillturn
blackincolorduetocollectionofdebrisandnotdueto
excessiveheat.Itisgoodpracticetowipethisexcess
greasefromthesealsaftertheinitial8hours.Theremay
alwaysappeartobeawetareaaroundtheseallip.This
isgenerallynotdetrimentaltobearinglife,butkeeps
thesealliplubricated.

Inspectthecoringheadbearingsevery500operating
hoursandreplaceasneeded.

Figure31

O-ringchain—Donotlubricatethechain.

Important:Bearingsrarelyfailfromdefectsin
materialsorworkmanship.Themostcommon
reasonforfailureismoistureandcontamination
workingitswaypasttheprotectiveseals.Bearings
thataregreasedwillrelyuponregularmaintenance
topurgeharmfuldebrisfromthebearingarea.
Sealedbearingsrelyonaninitialllofspecialgrease
andarobustintegralsealtokeepcontaminantsand
moistureoutoftherollingelements.

CheckingtheGearboxOil

ServiceInterval:Every50hours

Thegearboxislledwith80W–90gearoilorequivalent.
Allowthegearboxtocoolbeforecheckingtheoillevel.

1.Cleandebrisfromllplugandcheckplugtoavoid
contamination.

2.Removethecheckplugfromthegearbox(Figure32).

Note:Ifthegearboxhastwocheckplugs,usethe
bottomone.

25

Figure32

1.Vent/Fillplug

2.Checkplug

3.Drainplug

3.Makesureoilisuptothebottomofthecheckplug
holeingearbox(Figure32).

4.Ifoillevelislow ,removevent/llplugfromtopof
gearboxandreplenishoilasrequired.

Model

SR542quarts(1.9liters)

SR54–S2quarts(1.9liters)

SR702quarts(1.9liters)

SR70–S2quarts(1.9liters)

SR724quarts(3.8liters)

GearCaseCapacity

6.Installthevent/llplug.

7.Checktheoillevelandreplenishasrequired.

Inspecting/AdjustingtheDrive
Chain

ServiceInterval:Beforeeachuseordaily

Every50hours

Checkthedrivechainfordamageandcorrect
adjustment.Thechainshouldhaveapproximately1/2
inch(12.7mm)ofoveralldeection(1/4inch[6mm]in
eachdirection).

Chaintensioncanbeadjustedbyslightlylooseningthe
mainjamnutandtighteningthejamrodtodesired
position(Figure33orFigure34).Donotadjustthe
chaintensionwhenthechainishotorwarm.

5.Installplugs.

ChangingtheGearboxOil

ServiceInterval:Aftertherst50hours

Every500hours

Thegearboxislledwith80W–90gearoilorequivalent.

1.Cleandebrisfromvent/llpluganddrainplugto
avoidcontamination(Figure32).

2.Removethevent/llplugtorelieveairdraw.

3.Positionadrainpanunderthedrainplugandremove
theplug.

Note:Thehighviscosityofcooloilwillextendthe
draintime.(approximately30minutes)

4.Aftertheoiliscompletelydrained,reinstallthedrain
plug.

5.Fillthegearboxwithhighquality80W-90gearlube.
Usethefollowingcharttodeterminethegearbox
oilcapacity .

Figure33

Models54,54–S,70,&72

1.Drivechain3.Jamrod

2.Jamnut

26

Figure34

Models72

1.Drivechain3.Jamrod

2.Jamnut

Important:Donotovertightenchains;excess
tighteningofchainscancausegearbox/sprocket
damage.

stoppingthePTO.Turnbackthenutsanadditional
2turns.

Note:Donotallowtheclutchtoslipforan
extendedamountoftime.

3.Iftheclutchcontinuestoslipafterturningbackthe
nuts,tighteneachnutanaddition1/4turnuntilthe
slippingceases.Donotovertightenthenutsasshaft
damagemayoccur.

CheckingtheCoringHead
FastenerTorque

ServiceInterval:Aftertherst8hours

Every50hours

Usingthechartbelow,todeterminethetorqueofthe
crankpinnutsandthehingebolts(Figure36).These
arethetwomostcrucialareasofthemachinewhereloss
oftorquewillcausedamagetothecrankshaftalmost
immediately.

AdjustingthePTOClutch

ServiceInterval:Yearlyorbeforestorage

Frictionclutchesmaybecomehotduringuse.

Do not touch.

theareaaroundtheclutchfreeofammable
materialandavoidprolongedslippingofthe
clutch.

1.Attheendoftheseason,backoffeachoftheclutch
nuts2turns(Figure35).

Toavoidtheriskofre,keep

ModelsSR54,
SR54–S,SR70
&SR72–S

CrankShaftNut950ft-lbs.1200ft-lbs.

CrankPinNut950ft-lbs.950ft-lbs.

HingeBolt

1.Crankshaftnut

2.Crankpinnut

265ft-lbs.300ft-lbs.

Figure36

3.Hingebolts

SR72

Figure35

1.Clutchnut2.Clutch

2.Atthestartofthenewseason,startthePTOand
allowtheclutchtoslipforafewsecondsbefore

27

CheckingtheSprings

ServiceInterval:Beforeeachuseordaily

hosesandtheconnectinglinkfromthetractor.Cap
thehydraulichoses.Storethesecomponentswith
theaerator.

Checkthespringsforcrossedorbrokenwires
(Figure37).Crossedorbrokenspringwireswillcause
anerraticholepatternintheturf.

Figure37

1.Correctspringwires2.Crossedspringwires

Note:Replacementwiresareincludedwiththeaerator.
Thewiresareconsideredaconsumableitem.

AdjustingtheHoleSpacing

10.DisconnectthesafetyshieldchainsfromPTOshaft.

11.Pullbackonthelockcollartodisconnectthepower
shaftfromthetractorPTOshaft.

12.SlidethePTOshaftbackandremovefromtractor.

13.ConnectthePTOsafetychaintotheaeratorto
preventthePTOshaftfromcontactingtheground.

14.Removethepinssecuringthelowerlinkarmstothe
aeratorbrackets.Retainpinswithaerator.

Theforwardholespacingisdeterminedbythetractor’ s
gearratio(orthehydrostatictractionpedal).Changing
theengineRPMdoesnotchangetheforwardhole
spacing.

Thelateralholespacingisdeterminedbythenumber
oftinesinthetineheads.

RemovingtheAeratorfrom
theTractor

1.Stoptheaeratoronalevelsurface,notonaslope.

2.DisengagethePTOandengagetheparkingbrake.

3.Raisetheaeratorroller(s)3-6inchesoffground.
Placesupportblocksundertheroller(s).

4.Stoptheengineandremovethekeyfromignition
switch.

5.BeforeleavingtheOperator’sseatontractor,wait
forengineandallmovingpartstostop.

6.Removethetines.

7.Installthestoragestand.

8.Slowlyloweraeratoruntilstoragestandscontact
ground.

9.Removethepinsecuringthetoplinktotheaerator
bracket.Retainpinwithaerator.Also,onmodels
withahydraulictoplink,disconnectthehydraulic

28

TroubleShooting

Problem

Springsarebreakingornotpullingbackthe
headtonormalposition.

Holesareelongatedorpicking.

Tinesarehittingthegroundwithanerratic
pattern.

PTOclutchslipsexcessively.Adjusttinestoshallowdepth.ReplacePTOclutches.Reviewclutchadjustment

Turfispullingupwithcoringtines.Shallow-rootedturfmayrequiresolidtinesthersttime.

Thesoilistoohardforfullpenetration.

Coringtinesarebreaking.Youaretryingtogettoomuchdepthforthesoilcondition.Seeaboveandaerateto

Tineswillnotstayinthehead.

Tinespullthesoilupwhenthemachineis
raised.

Themachinewillnotturn.

Thetractorhasdifcultyliftingtheaerator.Movetractorliftarms3”(76.19mm)to4”(101.6mm)closertotheaerator.Make

Thehydraulictoplinkcylinderisspongy.(It
“gives”andmovesinandoutashortspan
whenforceisapplied.

Machineisnoisyorknocking.

Thehydraulictoplinkcylindercannotbefully
retracted(PTOshaftjams).

Thetractorisdifculttosteerwhenintransport.•Addweighttothefrontofthetractor.

SlowthePTOspeedofthetractor.Thelongerandheavierthetines,thegreaterthe
centrifugalforceonthehead.Checkforcrossedorbrokenspringwires.

Adjusttheangleofthetineorchangethetractorgroundspeed.Makesurethatthe
aeratorcanbeloweredatleast2inchesbelowatgroundleveltoallowforundulation.

•Checkforcrossedorbrokenspringwires.

•SlowthePTOspeedofthetractor.

procedure.

Aerateatadepththatthemachinecanachieve,waterovernight,andthenincrease
thedepth.Repeatifnecessaryuntilsoilcanbeaeratedatdesireddepth.

ashallowerdepth.

Tightenthetineholderbolts;donotusejamnutsorimpactwrench.Iftheboltwillnot
holdthetine,replaceit.

RaisethemachinepartofthewayoutofthesoilbeforedisengagingthePTO.

MakesurethePTO,driveshaftanddrivechainsareworkingproperly .

surethetractorhasthecapacitytolifttheaerator.

Airisinthecylinderorlinesandmustbebledout.

•Crankpinnuthasvibratedloose.•Chainsaretooloose.

•Boltsonthebottomoftheframeattherearofthemainarmhavevibratedloose.

•Checkoillevelingearbox.

ThePTOshaftistoolongforyourtractorandshouldbecuttothecorrectlength.

•Checktirepressureandadjustasrequired.

Solution

29

Storage

Attheendofanaeratingseasonorwhentheaeratorwill
notbeusedforalongperiod,itisgoodpracticetocarry
outthefollowingpreventativemaintenance.

1.Cleanoffanydirtorgreasethatmayhave
accumulatedontheaeratororanyofthemoving
parts.

2.Removeandcleanouttines.Coattineswithoilto
preventrustingduringstorage.

3.Openthehoodandcleanouttheinsideofthe
machine.

4.Lubricateallgreasettingsandtinefastenerscrew
threads.

5.Storethemachineontheprovidedstoragestandson
ahard,drysurface.

6.LoosenthePTOclutchboltstwoturns.

7.ConnectthePTOsafetychaintotheaeratorinstored
positiontopreventdamageorremovethePTOand
storeunderthehoodtominimizecorrosion.

8.Painttherollerandtouch-upanyotherscratcheson
thepaintedsurfaces.

9.Replaceanymissingordamageddecals.

10.Storetheaeratorinsideadrysecurebuilding.Inside
storagewillreducemaintenance,givealonger
workinglifeandincreasetheresidualvalueofthe
machine.Ifinsidestorageisnotavailable,coverwith
aheavysheetortarpaulinandsecuretightly .

30

Notes:

31

Toro Commercial Aerator Products Warranty

A Two-Year Limited Warranty

Conditions and Products Covered

The Toro Company and its affi liate, Toro Warranty Company,
pursuant to an agreement between them, jointly warrant your Toro
Hydroject or ProCore Aerator (“Product”) to be free from defects in
materials or workmanship for two years or 500 operational hours*,
whichever occurs fi rst. Where a warrantable condition exists, we
will repair the Product at no cost to you including diagnosis, labor,
parts, and transportation. This warranty begins on the date the
Product is delivered to the original retail purchaser.

* Product equipped with hour meter

Instructions for Obtaining Warranty Service

You are responsible for notifying the Commercial Products Dis­tributor or Authorized Commercial Poducts Dealer from whom
you purchased the Product as soon as you believe a warrantable
condition exists. If you need help locating a Commercial Products
Distributor or Authorized Dealer, or if you have questions regard­ing your warranty rights or responsibilities, you may contact us at:

Toro Commercial Products Service Department
Toro Warranty Company
8111 Lyndale Avenue South
Bloomington, MN 55420-1196
952-888-8801
E-mail: [e-mail]

Owner Responsibilities

As the Product owner, you are responsible for required mainte­nance and adjustments stated in your Operator’s Manual.
Failure to perform required maintenance and adjustments can be
grounds for disallowing a warranty claim.

Items and Conditions Not Covered

Not all product failures or malfunctions that occur during the
warranty period are defects in materials or workmanship. This
warranty does not cover the following:

Product failures which result from the use of non-Toro

•
replacement parts, or from installation and use of add-on,
or modifi ed non-Toro branded accessories and products. A
seperate warranty may be provided by the manufacturer of
these items.
Product failures which result from failure to perform recom-

•
mended maintenance and/or adjustments. Failure to properly
maintain your Toro product per the Recommended Mainte­nance listed in the Operator’s Manual can result in claims for
warranty being denied.
Product failures which result from operating the Product in an

•
abusive, negligent or reckless manner.
Parts subject to consumption through use unless found to

•
be defective. Examples of parts which are consumed, or
used up, during normal Product operation include, but are
not limited to, brake pads and linings, clutch linings, blades,
reels, rollers and bearings (sealed or greasable), bedknives,
aerator crankshaft and stomper arm bearings, tines, spark
plugs, castor wheels and bearings, tires, fi lters, belts, and
certain sprayer components such as diaphragms, nozzles,
and check valves, etc.

Failures caused by outside infl uence. Items considered to

•
be outside infl uence include, but are not limited to, weather,
storage practices, contamination, use of unapproved coolants,
lubricants, additives, fertilizers, water, or chemicals, etc.
Normal noise, vibration, wear and tear, and deterioration.

•
Normal “wear and tear” includes, but is not limited to, dam-

•
age to seats due to wear or abrasion, worn painted surfaces,
scratched decals or windows, etc.

Parts

Parts scheduled for replacement as required maintenance are war­ranted for the period of time up to the scheduled replacement time
for that part. Parts replaced under this warranty are covered for the
duration of the original product warranty and become the property
of Toro. Toro will make the fi nal decision whether to repair any ex-
isting part or assembly or replace it. Toro may use remanufactured
parts for warranty repairs.

Maintenance is at Owner’s Expense

Engine tune-up, lubrication cleaning and polishing, replacement of
fi lters, coolant, and completing Recommended Maintenance are
some of the normal services Toro products require that are at the
owner’s expense.

General Conditions

Repair by an Authorized Toro Distributor or Dealer is your sole
remedy under this warranty.

Neither The Toro Company nor Toro Warranty Company is
liable for indirect, incidental or consequential damages in
connection with the use of the Toro Products covered by this
warranty, including any cost or expense of providing sub­stitute equipment or service during reasonable periods of
malfunction or non-use pending completion of repairs under
this warranty. Except for the Emissions warranty referenced
below, if applicable, there is no other express warranty. All
implied warranties of merchantability and fi tness for use are
limited to the duration of this express warranty.

Some states do not allow exclusions of incidental or consequential
damages, or limitations on how long an implied warranty lasts, so
the above exclusions and limitations may not apply to you. This
warranty gives you specifi c legal rights, and you may also have
other rights which vary from state to state.

Note regarding engine warranty:

The Emissions Control System on your Product may be covered
by a separate warranty meeting requirements established by the
U.S. Environmental Protection Agency (EPA) and/or the California
Air Resources Board (CARB). The hour limitations set forth above
do not apply to the Emissions Control System Warranty. Refer to
the Engine Emission Control Warranty Statement printed in your
Operator’s Manual or contained in the engine manufacturer’s
documentation for details.

Countries Other than the United States or Canada

Customers who have purchased Toro products exported from the United States or Canada should contact their Toro Distributor (Dealer)
to obtain guarantee policies for your country, province, or state. If for any reason you are dissatisfi ed with your Distributor’s service or
have diffi culty obtaining guarantee information, contact the Toro importer.

Part Number 374-0032 Rev. C