Toro Groundsmaster 3320-D - Checking and Correcting Mismatch of Blades; Replacing the Drive Belt

Figure34
1.Sharpenatoriginalangle
Note:Removethebladesandsharpenthemona
grinder;refertoRemovingtheCuttingBlades.After
sharpeningthecuttingedges,installthebladewith
theanti-scalpcupandbladebolt.Thebladesails
mustbeontopoftheblade.Tightenthebladebolt
to85-110ft-lb(115-149N-m).
CheckingandCorrecting
MismatchofBlades
Ifthereismismatchbetweentheblades,thegrasswill
appearstreakedwhenitiscut.Thisproblemcanbe
correctedbymakingsurethatthebladesarestraightand
allofthebladesarecuttingonthesameplane.
1.Usinga3foot(1meter)longcarpenterslevel,nd
alevelsurfaceontheshopoor.
2.Raisetheheight-of-cuttothehighestposition;refer
toAdjustingtheHeight-of-Cut.
3.Lowerthecuttingunitontotheatsurface.Remove
thecoversfromthetopofthecuttingunit.
4.Rotatethebladesuntiltheendsfaceforwardand
backward.Measurefromtheoortothefronttipof
thecuttingedge.Rememberthisdimension.Then
rotatethesamebladesothattheoppositeendis
forward,andmeasureagain.Thedifferencebetween
thedimensionsmustnotexceed1/8inch(3mm).
Ifthedimensionexceeds1/8inch(3mm),replace
thebladebecauseitisbent.Makesuretomeasure
alloftheblades.
5.Comparethemeasurementsoftheouterbladeswith
thecenterblade.Thecenterblademustnotbemore
than3/8in.(10mm)lowerthantheouterblades.If
thecenterbladeismorethan3/8in.(10mm)lower
thantheouterblades,proceedtostep
6andadd
shimsbetweenthespindlehousingandthebottom
ofthecuttingunit.
6.Removethebolts,atwashers,lockwashers,and
nutsfromtheouterspindleintheareawhere
theshimsmustbeadded.Toraiseorlowerthe
blade,addashim,PartNo.3256-24,betweenthe
spindlehousingandthebottomofthecuttingunit.
Continuetocheckthealignmentofthebladesand
addshimsuntilthetipsofthebladesarewithinthe
requireddimension.
Important:Donotusemorethanthreeshimsat
anyoneholelocation.Usedecreasingnumbers
ofshimsinadjacentholesifmorethanoneshim
isaddedtoanyoneholelocation.
7.Installthebeltcovers.
ReplacingtheDriveBelt
Thebladedrivebelt,tensionedbythespringloaded
idlerpulley,isverydurable.However,aftermanyhours
ofuse,thebeltwillshowsignsofwear.Signsofaworn
beltare:squealingwhenbeltisrotating,bladesslipping
whencuttinggrass,frayededges,burnmarksandcracks.
Replacethebeltifanyoftheseconditionsareevident.
1.Lowerthecuttingunittotheshopoor.Remove
thebeltcoversfromthetopofthecuttingunitand
setthecoversaside.
2.Usingatorquewrenchorsimilartool,movetheidler
pulley(
Figure35)awayfromthedrivebelttorelease
thebelttensionandallowthebelttobeslippedoff
thegearboxpulley(Figure36).
Figure35
1.Idlerpulley
Figure36
1.Gearbox
3.Removetheoldbeltfromaroundthespindlepulleys
andidlerpulley.
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