Oregon CS250 - Oregon Chainsaw Kickback Safety; Understanding Kickback; Kickback Safety Devices

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OREGON® PowerNow™ 40V MAX CHAINSAW
MODEL CS250 OPERATOR’S MANUAL
F/N 547361 RevAD
© 2011 Blount, Inc.
SAFETY RULES
•Whenfelling,keepbystandersatleast
two tree lengths away.
•Achainsawisintendedfortwo-handed
use(Fig.2).Seriousinjurytothe
operator,helpers,and/orbystanders
canresultfromone-handedoperation.
Fig. 2
•Whenbucking,securethework
piecepriortocutting.Whenfellingor
pruning,identifyandsecurehazardous
branches.
•Aggressiveorabusivecuttingor
misuseofthechainsawcancause
prematurebar,chain,and/orsprocket
wear, as well as broken chain or bar,
leading to kickback, chain throw or the
ejectionofmaterial.
•Neverusetheguidebarasalever.A
bentguidebarcancausepremature
bar,chain,and/orsprocketwear,as
well as broken chain or bar, leading to
kickback,chainthrowortheejection
ofmaterial.
•Useextremecautionwhencutting
smallbrushandsaplingsbecause
slender material can catch the saw
chainandbewhippedtowardyouor
cancausethechaintobethrownfrom
the guide bar.
•Cutonlyoneworkpieceatatime.
KICKBACK
WARNING: KICKBACK IS AN
EXTREMELY FAST, BACKWARD
AND/OR UPWARD MOTION OF THE
CHAINSAW OCCURRING WHEN THE
SAW CHAIN NEAR THE NOSE OR TOP
AREA OF THE GUIDE BAR CONTACTS
ANY OBJECT, OR WHEN THE WOOD
CLOSES IN AND PINCHES THE GUIDE
BAR.
•Allsawchaincankickback.
•Kickbackcanleadtodangerousloss
ofcontrolofthechainsawwhichcan
resultinseriouspersonalinjurytosaw
operatorortobystanders.
•Avoidcontactoftheupperquadrant
oftheguidebarnosewithanyobject.
KICKBACK SAFETY DEVICES
ON THIS SAW
CHAIN BRAKE
Thechainsawcomesequippedwith
achainbrake,whichstopsboththe
motorandthemotionofthechain
whenkickbackoccurs(Fig.3).Thechain
brakecanbeactivatedbytheforward
motionofthehandguardasthesaw
rotates backward during kickback; it can
alsobeactivatedbytheinertialforces
generatedduringrapidpushback.
Fig. 3