Toro 74990 - Servicing the Cutting Blades

ServicingtheCutting
Blades
Maintainsharpbladesthroughoutthecuttingseason,
becausesharpbladescutcleanlywithouttearingor
shreddingthegrassblades.T earingandshredding
turnsgrassbrownattheedges,whichslowsgrowth
andincreasesthechanceofdisease.
Checkthecutterbladesdailyforsharpness,and
foranywearordamage.Filedownanynicksand
sharpenthebladesasnecessary.Ifabladeis
damagedorworn,replaceitimmediatelywitha
genuineTororeplacementblade.Forconvenient
sharpeningandreplacement,youmaywanttokeep
extrabladesonhand.
DANGER
Awornordamagedbladecanbreak,anda
pieceofthebladecouldbethrownintothe
operator'sorbystander'sarea,resultingin
seriouspersonalinjuryordeath.
•Inspectthebladeperiodicallyforwearor
damage.
•Replaceawornordamagedblade.
BeforeInspectingorServicingthe
Blades
Parkthemachineonalevelsurface,disengagethe
blade-controlswitch(PTO),andsettheparkingbrake.
TurntheignitionkeytoOff.Removethekey.
InspectingtheBlades
ServiceInterval:Beforeeachuseordaily
1.Inspectthecuttingedges(Figure95).Ifthe
edgesarenotsharporhavenicks,removeand
sharpentheblades.RefertoSharpeningthe
Blades.
2.Inspecttheblades,especiallythecurvedarea
(Figure95).Ifyounoticeanydamage,wear,ora
slotforminginthisarea(Figure95),immediately
installanewblade.
g006530
Figure95
1.Cuttingedge3.Wear/slotforming
2.Curvedarea4.Crack
CheckingforBentBlades
1.Disengagetheblade-controlswitch(PTO),move
themotion-controlleverstotheneutral-locked
positionandsettheparkingbrake.
2.Stoptheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.Rotatethebladesuntiltheendsfaceforward
andbackward(Figure96).Measurefromalevel
surfacetothecuttingedge,positionA,ofthe
blades(Figure96).Notethisdimension.
g000975
Figure96
1.Measureherefromblade
tohardsurface
2.PositionA
4.Rotatetheoppositeendsofthebladesforward.
5.Measurefromalevelsurfacetothecuttingedge
ofthebladesatthesamepositionasinstep3
above.Thedifferencebetweenthedimensions
obtainedinsteps3and4mustnotexceed
1/8inch(3mm).Ifthisdimensionexceeds
1/8inch(3mm),thebladeisbentandmustbe
replaced;refertoRemovingtheBlades(page
66)andInstallingtheBlades(page66).
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