Product Manual

20
AF 0911 - F/N 547361
OREGON® PowerNow™
CHAINSAW MODEL CS250
OPERATING THE SAW
PRUNING
Whenpruning,makesureallbystanders
orhelpersareasafedistancefrom
fallingbranchesandarenotdirectly
infrontoforbehindthesawoperator.
Secureanybranchesthatmightpose
ahazard.Usetheproperauxiliary
equipment.Maintaingoodfooting,hold
thesawrmlywithbothhands,anddo
notoverreach.
Withthesawatfullspeed,bringthe
bottomoftheguidebarintocontact
withthebranchtobecut.Continue
cuttingusinglightpressure.Forlarger
branches,rstmakeashallowundercut
onthebottomofthebranchandthen
nishthecutfromthetop.Cuttinga
largebranchcompletelyfromthetop
couldcausesplintering.Acompletecut
fromthebottomcancausethebranch
topinchthebar.
FELLING A TREE
Whenbuckingandfellingoperations
arebeingperformedbytwoormore
persons,atthesametime,thefelling
operationshouldbeseparatedfrom
thebuckingoperationbyadistance
ofatleasttwicetheheightofthetree
beingfelled.Treesshouldnotbefelled
inamannerthatwouldendangerany
person,strikeanyutilitylineorcause
anypropertydamage.Ifthetreedoes
makecontactwithanyutilityline,the
utilitycompanyshouldbenotied
immediately.
Thechainsawoperatorshouldkeepon
theuphillsideoftheterrainasthetree
islikelytorollorslidedownhillafteritis
felled.Aretreatpathshouldbeplanned
andclearedasnecessarybeforecutsare
started.Theretreatpathshouldextend
backanddiagonallytotherearofthe
expectedlineoffall(Fig.14).
RETREAT PATH OPTIONS
DIRECTION
OF FALL
RETREAT
RETREAT
Fig. 14
45°
Beforefellingisstarted,considerthe
naturalleanofthetree,thelocationof
largerbranchesandthewinddirection
tojudgewhichwaythetreewillfall.
Removedirt,stones,loosebark,nails,
staples,andwirefromthetreewhere
fellingcutsaretobemade.
1
)
NOTCHING UNDERCUT
Makethenotch1/3thediameter
ofthetree,perpendiculartothe
directionoffall.Makethelower
horizontalnotchingcutrst.Thiswill
helptoavoidpinchingofeitherthe
sawchainortheguidebarwhenthe
secondnotchisbeingmade(Fig.15).
NOTCHING UNDERCUT
DIRECTION
OF FALL
NOTCH
Fig. 15