Figure84
1.Bladebolt2.Anti-scalpcup
InspectingandSharpeningthe
CutterBlade(s)
DANGER
Awornordamagedbladecanbreak,andapiece
ofthebladecouldbethrownintotheoperator's
orbystander'sarea,resultinginseriouspersonal
injuryordeath.Tryingtorepairadamagedblade
mayresultindiscontinuedsafetycerticationof
theproduct.
•Inspectthebladeperiodicallyforwearor
damage.
•Nevertrytostraightenabladethatisbentor
weldabrokenorcrackedblade.
•Replaceawornordamagedblade.
Twoareasmustbeconsideredwhencheckingandservicing
thecutterblade-thesailandthecuttingedge.Bothcutting
edgesandthesail,whichistheturnedupportionopposite
thecuttingedge,contributetoagoodquality-of-cut.The
sailisimportantbecauseitliftsthegrassupstraight,thereby
producinganevencut.However,thesailwillgraduallywear
downduringoperation,andthisconditionisnormal.Asthe
sailwearsdown,thequality-of-cutwilldegradesomewhat,
althoughthecuttingedgesaresharp.Thecuttingedgeof
theblademustbesharpsothatthegrassiscutratherthan
torn.Adullcuttingedgeisevidentwhenthetipsofthegrass
appearbrownandshredded.Sharpenthecuttingedgesto
correctthiscondition.
1.Positionthemachineonalevelsurface.Raisethe
cuttingunit,engagetheparkingbrake,putthetraction
pedalinneutral,putthePTOleverintheOffposition,
stoptheengine,andremovetheignitionkey.
2.Examinethecuttingendsofthebladecarefully,
especiallywheretheatandcurvedpartsoftheblade
meet(
Figure85).Sincesandandabrasivematerialcan
wearawaythemetalthatconnectstheatandcurved
partsoftheblade,checkthebladebeforeusingthe
mower.Ifwearisnoticed(
Figure85),replacetheblade.
Figure85
1.CuttingEdge3.Wear/slotForming
2.CurvedArea4.Crack
3.Examinethecuttingedgesofalloftheblades.Sharpen
thecuttingedgesiftheyaredullornicked.Sharpen
onlythetopofthecuttingedgeandmaintainthe
originalcuttingangletomakesureofsharpness(Figure
86).Thebladewillremainbalancedifthesameamount
ofmetalisremovedfrombothcuttingedges.
56
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