
FormNo.3368-805RevC
ProCoreSR48,SR54,SR54–S,
SR70,SR70–S,SR72andSR75
Aerators
ModelNo.09930—SerialNo.311000001andUp
ModelNo.09931—SerialNo.311000001andUp
ModelNo.09932—SerialNo.311000001andUp
ModelNo.09933—SerialNo.311000001andUp
ModelNo.09934—SerialNo.311000001andUp
ModelNo.09935—SerialNo.311000001andUp
ModelNo.09936—SerialNo.311000001andUp
ToregisteryourproductordownloadanOperator'sManualorPartsCatalogatnocharge,gotowww.Toro.com.OriginalInstructions(EN)

Introduction
Readthisinformationcarefullytolearnhowtooperate
andmaintainyourproductproperlyandtoavoidinjury
andproductdamage.Youareresponsibleforoperating
theproductproperlyandsafely.
YoumaycontactTorodirectlyatwww .Toro.comfor
productandaccessoryinformation,helpndingadealer,
ortoregisteryourproduct.
Wheneveryouneedservice,genuineToroparts,
oradditionalinformation,contactanAuthorized
ServiceDealerorToroCustomerServiceandhave
themodelandserialnumbersofyourproductready .
Figure1identiesthelocationofthemodelandserial
numbersontheproduct.Writethenumbersinthe
spaceprovided.
Thismanualidentiespotentialhazardsandhassafety
messagesidentiedbythesafetyalertsymbol(Figure2),
whichsignalsahazardthatmaycauseseriousinjury
ordeathifyoudonotfollowtherecommended
precautions.
Figure2
1.Safetyalertsymbol
Thismanualuses2otherwordstohighlightinformation.
Importantcallsattentiontospecialmechanical
informationandNoteemphasizesgeneralinformation
worthyofspecialattention.
1.Modelandserialnumberlocation
ModelNo.
SerialNo.
©2011—TheToro®Company
8111LyndaleAvenueSouth
Bloomington,MN55420
Figure1
Contactusatwww.Toro.com.
2
PrintedintheUSA.
AllRightsReserved

Contents
Introduction.................................................................2
Safety...........................................................................4
SafeOperatingPractices.......................................4
SafetyandInstructionalDecals.............................6
Setup...........................................................................8
1RemovingtheAeratorfromtheCrating..............9
2ConnectingtheLowerLinkArms......................9
3ConnectingtheHydraulicTopLink
(ModelsSR48,SR54,SR70,SR72and
SR75).............................................................10
4ConnectingtheTractorUpperLink(Models
SR54–SandSR70–S)......................................12
5VerifyingtheHydraulicTopLinkSet
Up..................................................................12
6CheckingthePTOAngle.................................13
7FittingthePTOshaft.......................................14
8InstallingthePTOShield.................................15
9ConnectingthePTOShaft...............................16
10AdjustingtheSwayLinks................................17
11LevelingtheAeratorSide-to-Side...................18
12InstallingtheTines.........................................18
13SettingtheTineDepth(ModelsSR54–S
andSR70–S)...................................................18
14InstallingtheRearGuard................................19
15InstallingtheLatchLock................................20
16RemovingtheStorageStands(ModelsSR54
andSR70)......................................................20
17RemovingtheStorageStands(ModelsSR48
andSR72).......................................................21
ProductOverview......................................................22
Specications.....................................................22
Attachments/Accessories...................................22
Operation...................................................................23
TractorControls.................................................23
PrinciplesofOperation......................................23
TractorPTOSpeed............................................23
TrainingPeriod...................................................23
BeforeAerating..................................................23
AeratingProcedures...........................................24
OperatingTips...................................................24
SubsoilCultivation.............................................25
HardGround.....................................................25
Longer/LargerTines..........................................25
MultiRowAdapterHeads..................................25
RootZoneLifting..............................................25
UsingtheHoodPropRodsModelSR75
only................................................................25
AdjustingtheTineAngle....................................26
AdjustingtheTineDepth(ModelsSR54–S
andSR70–S)...................................................27
TransportOperation..........................................27
InspectionandCleanupafterUse........................28
Maintenance...............................................................29
RecommendedMaintenanceSchedule(s)................29
LiftingtheMachine............................................29
GreasingtheBearings.........................................30
CheckingtheGearboxOil..................................30
ChangingtheGearboxOil..................................31
Inspecting/AdjustingtheDriveChain................31
AdjustingthePTOClutch..................................32
FastenerTorqueSpecications............................32
CheckingtheSprings..........................................33
AdjustingtheHoleSpacing.................................33
RemovingtheAeratorfromtheTractor...............33
TroubleShooting...............................................34
Storage.......................................................................35
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
instructionsisnotqualiedtooperatethismachine.
Becomefamiliarwithallcontrolsandknowhowto
stopquickly.
•Donotallowchildrentooperatethemachine.Do
notallowadultstooperatethemachinewithout
properinstruction.
•Removealldebrisorotherobjectsthatmight
interferewithoperation.Keepallbystandersaway
fromtheworkarea.
•Locateandmarkallundergroundobstructionssuch
asirrigationcomponents,electricalortelephone
lines.
•Makesuretractorisinneutralandparkingbrake
appliedbeforestarting.RefertoTractorOperator's
Manualforsafestartingprocedures.
•Ensurethatyourtractorissuitableforusewithan
implementofthisweightbycheckingwithyour
tractorsupplierormanufacturer.
•Mountingtheaeratortotherearofthetractorwill
decreasetheweightonthetractorfrontaxle.To
assureadequatesteeringcontrolandstabilityitmay
benecessarytoaddballasttothefrontofthetractor.
RefertoTractorOperator'sManualforballast
requirements.
•Keepallshieldsandsafetydevicesinplace.Ifa
shield,safetydeviceordecalisdamaged,repairor
replaceitbeforeoperationiscommenced.Also
tightenanyloosenuts,boltsandscrewstoensure
machineisinsafeoperatingcondition.
•Donotoperatemachinewhilewearingsandals,
tennisshoes,sneakersorshorts.Also,donotwear
loosettingclothingwhichcouldgetcaughtin
movingparts.Alwayswearlongpantsandsubstantial
shoes.W earingsafetyglasses,safetyshoes,hearing
protectionandahelmetisadvisableandmaybe
requiredbysomelocalordinancesandinsurance
regulations.
WhileOperating
•Neveroperatethetractorinreversewhentheaerator
islowered.
•Keepallbystandersandpetsawayfromthework
area.
•Usingthemachinedemandsattention,andto
preventlossofcontrol:
–Useonlyindaylightorwhenthereisadequate
articiallight.
–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
therollerisapproximately5inchesfromtheground.
•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.Makesureallrequiredreectors
andlightsareinplaceandarecleanandvisibleby
overtakingandoncomingtrafc.
•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
tospecication.
•Donotcheckoradjustthechaintensionwhenthe
tractorengineisrunning.
•Besureallguardsarereplacedandthehoodis
securedshutaftermaintainingoradjustingthe
machine.
•Performonlythosemaintenanceinstructions
describedinthismanual.Ifmajorrepairsare
everneededorassistanceisdesired,contactan
AuthorizedToroDistributor.Toensureoptimum
performanceandsafety,alwayspurchasegenuine
Tororeplacementpartsandaccessoriestokeepthe
ToroallT oro.Neveruse"will-t"replacementparts
andaccessoriesmadebyothermanufacturers.Look
fortheTorologotoensuregenuineness.Using
unapprovedreplacementpartsandaccessoriescould
voidthewarrantyofTheToroCompany .
StorageSafety
•Storetheaeratoronthestoragestandspositionedon
armlevelsurface.
•Storetheaeratorawayfromareasofhumanactivity.
•Donotallowchildrentoplayonoraroundthe
storedmachine.
•Makesuretheaeratorispositionedonrmandsolid
groundsoitdoesnotsinkortipover.
•Frictionclutchesmaybecomehotduringuse.Do
nottouch.Toavoidtheriskofre,keepthearea
aroundtheclutchfreeofammablematerialand
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
92–1581
1.Crushinghazardofhandorfoot—keepbystandersasafe
distancefromthemachine.
92–1582
6

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.
120-0625
1.Pinchpoint,hand—keephandsaway.
7

Setup
LooseParts
Usethechartbelowtoverifythatallpartshavebeenshipped.
ProcedureDescription
1
2
3
4
5
6
7
Nopartsrequired
Hitchpin2
Lynchpin2
Hydraulictoplink1
Hydraulichose,3–1/2feet
Hydraulichose,2–1/2feet
Extensionbracket2
Rotationalbracket1
Hosequickcouplings2
Springloadedtoplink
Linkpin3
Lynchpin3
Nopartsrequired
Nopartsrequired
PTOshaft
Qty.
Use
–
1
1
1
–
–
1
Removetheaeratorfromthecrating
Connectlowerlinkarms(Hitchpinsand
lynchpinsareshippedinstalledonthe
SR54andSR54-SAerators)
ConnectHydraulicT opLink(Models
SR48,SR54,SR70,SR72andSR75)
ConnectUpperLink(ModelsSR54–S
andSR70–S)
Verifythetoplinksetup
CheckingthePTOangle
FittingthePTOshaft
8
9
10
11
12
13
14
15
16
PTOShield
Pin(suppliedwithPTOshaft)
Nut(suppliedwithPTOshaft)
Nopartsrequired
Level(notsupplied)
Tines
Nopartsrequired
Rearguard1
Screw,3/8x3–1/4inch
Flatwasher,.438x1.00inch12
Locknut4
Endcap2
Lockplate2
Tapbolt2
Retainingring2
Nopartsrequired
1
1
1
–
1
A/R
–
4
–
InstallthePTOShield
ConnectPTOShaft
AdjustingSwayLinks
LevelAeratorSide-to-Side
InstalltheTines
Setthetinedepth
Installtherearguard
Installthelatchlock
RemoveStorageStands
17
Nopartsrequired
8
–
RemoveStorageStands

MediaandAdditionalParts
Operator'sManual
PartsCatalog
SpringWires-SR48
SpringWires-SR48
SpringWires-SR54&SR54-S
SpringWires-SR70&SR70-S
SpringWires-SR72
SpringWires-SR72
SpringWires-SR75
SpringWires-SR75
Operatortrainingmaterials
PTOOperatorsManual
Description
Qty.
1
1
4Replacementspringwires
2Replacementspringwires
6Replacementspringwires
8Replacementspringwires
4Replacementspringwires
2Replacementspringwires
4Replacementspringwires
2Replacementspringwires
1
1
Readbeforeoperatingtheaerator
Usetoreferencepartnumbers
Viewbeforeoperatingtheaerator
Readbeforeoperatingtheaerator
Use
1
RemovingtheAeratorfrom
theCrating
NoPartsRequired
Procedure
1.Removetheaeratorfromthecrating.
2.Removetheboltssecuringtheaeratorstoragestands
totheshippingpalletandremovetheaeratorfrom
thepallet.
3.Removethestoragestandsfromtheaerator.Retain
themforstorageuse.
Note:TheSR54-SandtheSR70-Sdonothave
shippingstands.
4.Placetheaeratoronaat,levelsurfacewiththe
frontrolleronthegroundanda2x4positioned
undertheheads.
2
ConnectingtheLowerLink
Arms
Partsneededforthisprocedure:
2Hitchpin
2Lynchpin
Procedure
1.Backthetractorsquarelyuptotheaeratoruntil
thelowerlinkarmsarealignedwiththemounting
brackets.
Note:Theaeratorgearboxshaftshouldbeinline
withthetractorPTOshaft(centeredonthetractor).
Iftheyarenotinline,adjustthelowerlinkarms,
fromsidetosideuntiltheshaftsarealigned.
2.MakesurethePTOisdisengaged.
3.Engagetheparkingbrake,STOPtheengineand
removethekeyfromtheignition.Waitforthe
engineandallmovingpartstoSTOPbeforeleaving
theOperator'sseatonthetractor.
Note:Formaximumgroundclearance,thehitch
pinsshouldbesecuredintheaeratorlowermounting
bracketholes,whensoequipped.Todetermine
9

whentousetheuppermountingholes,referto
ConnectingthePTOShaft.
SR54andSR54-SAeratorsonly
Note:Thehitchpinsandlynchpinsareshipped
installedontheSR54andSR54-SAerators.
4.Securethelowerlinkarmstotheaeratormounting
pinswithlynchpins(
1.Aeratormountingpin3.Lynchpin
2.Lowerlink
Figure3).
Figure3
3
Connectingthe
HydraulicTopLink
(ModelsSR48,SR54,SR70,
SR72andSR75)
Partsneededforthisprocedure:
1Hydraulictoplink
1
Hydraulichose,3–1/2feet
1
Hydraulichose,2–1/2feet
2Extensionbracket
1Rotationalbracket
2Hosequickcouplings
Procedure
Note:Makesurethesuppliedcouplingsarecorrectfor
thetractor.Ifnot,itwillbenecessarytocontactthe
tractormanufacturertoobtainthecorrectcouplings.
SR48,SR70,SR70-S,SR72andSR75Aerators
only
5.Securethelowerlinkarmstotheaeratormounting
bracketswithhitchpinsandlynchpins(
Figure4
1.Hitchpin3.Lowerlink
2.Aeratormountingbracket4.Lynchpin
Figure4).
Thetractormustbeequippedwithadoubleactingspool
valvewithanoperatorcontrolleverandtwo1/2inch
(12.7mm)quick-releasecouplingsattherearofthe
tractor.Twoquickcouplingshavebeenprovidedtot
tothehydraulictoplinkhoses(1/2–14NPTFhoseend
threadsize).
Thissectionwillbeusedtoinstallthehosesand
determinetheneedfortheextensionorrotationblocks.
Thisinformationwillhelptodeterminethedepthrange
oftheaerator.
1.Securetheconnectinglinkendofthehydraulictop
linktothetractorwiththepinssuppliedwiththe
tractor(
therodendistowardtheaerator.Thecylinderports
shouldbepositionedtowardthetractor'sauxiliary
powerhydraulics.
Note:Ifthehydrauliccylindermustbepositioned
withtheportsfacingupward,usetherotationalblock
insteadofthestandardmountingblocktoreposition
thecylinder(
maybeusedinsteadoftherotationalblock(ttings
arenotsupplied).
Figure5).Positionthehydraulictoplinkso
Figure5).A90degreehydraulictting
Installtherotationalblockasfollows:
A.Removethecotterpinandpinsecuring
thestandardconnectinglinktothecylinder
10

(Figure5).Removetheconnectinglinkfromthe
cylinder.
B.Installtherotationalblocktothecylinderwith
thepinspreviouslyremoved(
Figure5
Figure5).
Important:Whensecuringtherodendof
thehydrauliclink,makesuretousethemost
forwardmountingholesinthemountingbracket
sothereisenoughclearanceforthebarrelofthe
cylinderwhenretracted.
1.Aeratorhitchpin7.Tractorlinkpin
2.Hydraulictoplink
3.Rotationalblock
4.Connectinglink10.3–1/2foothydraulichose
5.3inchextensionblock11.Hosequickcouplings
6.5inchextensionblock12.Tractorhydraulicports
8.Clevis&lynchpin
9.2–1/2foothydraulichose
2.Connectthe3–1/2footlonghydraulichosetothe
hydraulictoplinkportwhichisclosesttotheaerator
Figure5.ApplyTeontapeorpipethreadsealantto
thehosethreadstopreventanyleaks.
3.Connectthe2–1/2footlonghydraulichosetothe
hydraulictoplinkportwhichisclosesttothetractor
Figure5).ApplyTeontapeorpipethreadsealant
(
tothehosethreadstopreventanyleaks.
4.Installquickcouplingstothehydraulichoses
(1/2–14NPTFhoseendthreadsize).ApplyTeon
tapeorpipethreadsealanttothehosethreadsto
preventanyleaks.
5.Connectthetwohydraulichosequickcouplingsto
theportsprovidedonthetractor.
6.Startthetractorengineandoperatethetractorspool
valvetochecktheextendandretractmotionofthe
hydraulictoplink.
Note:Reversethehoseconnections,atthetractor,
iftheydonoagreewiththetractorcontroloperation.
Figure6
SR54andSR70mountingshown
1.Rodendofcylinder
2.Lynchpin
SR48andSR72mountingshown
1.Lynchpin3.Linkpin
2.Aeratorbracket
3.Linkpin
4.Aeratorbracket(forward
Figure7
4.Rodendofcylinder
holes)
7.Securetherodendofhydraulictoplinktothemost
forwardholepossibleintheaeratorbracketwithlink
pinandlynchpin(
Figure6,Figure7orFigure8).
11