BladeMaintenance
BladeSafety
•Inspectthebladesperiodicallyforwearordamage.
•Usecarewhencheckingtheblades.Wrapthe
bladesorweargloves,andusecautionwhen
servicingtheblades.Onlyreplaceorsharpenthe
blades;neverstraightenorweldthem.
•Onmulti-bladedmachines,takecareasrotating
onebladecancauseotherbladestorotate.
•Replacewornordamagedbladesandboltsinsets
topreservebalance.
ServicingtheCutting
Blades
Toensureasuperiorqualityofcut,keeptheblades
sharp.Forconvenientsharpeningandreplacement,
youmaywanttokeepextrabladesonhand.
BeforeInspectingorServicingthe
Blades
1.Parkthemachineonalevelsurface,disengage
theblade-controlswitch(PTO),andengagethe
parkingbrake.
2.Shutofftheengine,removethekey,and
disconnectthespark-plugwiresfromthespark
plugs.
InspectingtheBlades
ServiceInterval:Beforeeachuseordaily
1.Inspectthecuttingedges(Figure72).
2.Iftheedgesarenotsharporhavenicks,remove
andsharpentheblade;refertoSharpeningthe
Blades(page58).
3.Inspecttheblades,especiallyinthecurvedarea.
4.Ifyounoticeanycracks,wear,oraslotforming
inthisarea,immediatelyinstallanewblade
(Figure72).
g006530
Figure72
1.Cuttingedge3.Wear/slotforming
2.Curvedarea4.Crack
CheckingforBentBlades
1.Rotatethebladesuntiltheendsfaceforward
andbackward.
2.Measurefromalevelsurfacetothecutting
edge,positionA,oftheblades(Figure73).
g000975
Figure73
1.Measureherefromblade
tohardsurface
2.PositionA
3.Rotatetheoppositeendsofthebladesforward.
4.Measurefromalevelsurfacetothecuttingedge
ofthebladesatthesamepositionasinstep2
above.
Note:Thedifferencebetweenthedimensions
obtainedinsteps2and4mustnotexceed3
mm(1/8inch).
Note:Ifthisdimensionexceeds3mm(1/8
inch),thebladeisbentandmustbereplaced.
57
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