ReplacingtheBlades
Model21623
ServiceInterval:Yearly
Important:Youwillneedatorquewrenchto
installthebladeproperly.Ifyoudonothavea
torquewrenchorareuncomfortableperforming
thisprocedure,contactanAuthorizedService
Dealer.
Ifthebladeisdamagedorcracked,replaceit
immediately.Ifthebladeedgeisdullornicked,have
itsharpenedandbalanced,orreplaceit.
WARNING
Whenservicingtheblade,thebladecanstill
moveeventhoughthepowersourceisoff.
Thebladeissharp;contactingthebladecan
resultinseriouspersonalinjury.
•Keepyourhandsandfeetawayfroma
movingblade.
•Weargloveswhenservicingtheblade.
1.Removetheelectric-startbuttonandbattery
packfromthemachine.
2.Useablockofwoodtoholdthebladesteady
(Figure23).
3.Removetheblades,savingallmounting
hardware(Figure23).
g423077
Figure23
4.Removetheboltsandnutssecuringthetopand
bottombladestogether.
5.Securethenewbladestoeachotherasshown
inFigure24;torquethenutssecuringblades
togetherto18.9to19.6N∙m(167to173in-lb).
Note:Ensurethatthebladeisinstalledbetween
thetabsontheundersideofthefan.
g423066
Figure24
1.Tabmarkingsonfan
4.Bottomblade
2.Locknut5.Hex-headbolts
3.Topblade6.Bladebolt
6.Installthenewbladesusingthebladebolt
(Figure24).
7.Useatorquewrenchtotightenthebladebolt
to61to74N∙m(45to55ft-lb).
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